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Line Pair GaugeThanks Mr. Lopez for your quick response. The figure of gauge does NOT have clear instruction label which numerical scale is LP/mm and it placed on the middle so it’s created confusion and could be any of the two numerical scale. From your explanation I could understand the right numerical scale is LP/mm. Based on your explanation I could imagine if able to see 5 Individual Peaks in line profile (say at red line position) then my resolution is 3.5 lp/mm. Still not clear what is the purpose of left numerical scale and if their conversion from left to right. Most of the searched found documents lacks in clear practical instruction about its use and might assumed that they user already know how to use it.   Reply Translate  close  Rick Lopez R & D, John Deere - Tech Works Ames, USA, Joined Jul 2011, 220 17:01 Dec-15-2016 https://www.ndt.net/forum/thread.php?msgID=66274#66274 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 16:17 Dec-15-2016 . You are almost on the right track. A simple left-side to right-side horizontal line is not correct. The numbers on the right just tell the user what the horizontal increments on the left side are. For example, if your magnification system allows you to resolve as fine as the 17th increment down, then you would have 16 line-pairs per millimeter resolution.   Reply Translate  close  rhinemine Germany, Joined Dec 2016, 11 18:07 Dec-16-2016 https://www.ndt.net/forum/thread.php?msgID=66286#66286 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to Rick Lopez at 17:01 Dec-15-2016 . Thanks again Rick for clarification. My previous understanding was wrong. So its as you said "numbers on the right are horizontal increments value on the left side are". So need to get horizontal increment position from left scale (lowest position of line signal profile where still can see five distinct individual peaks) and corresponding numerical value (as per right scale) is LP/MM. So right is scale is just aiding to display the left increment value and you can still gauge LP/MM just using the left scale only. When I correlate left increment position to right number only one number still remain odd is number 11. I could not match with it any left horizontal increment. Correct me if I am wrong again. How about when you are in middle or somewhere between two horizontal increment? Assuming just visual interpolation of value. Thanks.   Reply Translate  close  Dr. Uwe Zscherpel Director, BAM Berlin, Germany, Joined Jan 2010, 127 128 11:24 Dec-20-2016 https://www.ndt.net/forum/thread.php?msgID=66304#66304 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 18:07 Dec-16-2016 . Hi, nicely figured out how to read the scale of the converning line pair gauge correctly! But how to measure image unsharpness or basic spatial resolution with this tpye of gauge? The only usefully parameter I found which could be meaured by this type of gauge is the pixel size of the digital image. Exactly for this measurement is was designed in the printing industry about 50 years ago! But this need a correct procedure how to convert the visible line pair resolution in LP/mm into pixel size of mm. So a pixel size of 100 micron corresponds to a maximum of 5 LP/mm. For unsharpness measurements and basic spatial resolution in digital images I recommend ASTM E 2002 or ISO 19232-5 Duplex wire IQIs and the evalustion procedures given in these standards. Best regards Uwe Z.   Reply Translate  close  SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases Subscribe Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Publish Privacy Policy Contact & Imprint About Follow us © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website. More Info Accept top this is debug window

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by LN Thibos · 2013 · Cited by 95 — Methods: We examined the possibility that ocular spherical aberration (SA) elicits a sign of defocus by optical modeling of image formation using the principles ...

Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases

A quick Google search shows that some background info can be found here: https://www.nde-ed.org/EducationResources/CommunityCollege/Radiography/AdvancedTechniques/Real_Time_Radiography/ImageQualityIndicators.htm Horizontal lines on left in your photo correlate to increments of line pairs per millimeter resolution of system under test shown on the right (e.g. "I can see no better than the 5th horizontal line", so your resolution is the 5th value down on the right, or 3.5 LP/mm).   Reply Translate  close  rhinemine Germany, Joined Dec 2016, 11 16:17 Dec-15-2016 https://www.ndt.net/forum/thread.php?msgID=66272#66272 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to Rick Lopez at 23:08 Dec-14-2016 . Line Pair GaugeThanks Mr. Lopez for your quick response. The figure of gauge does NOT have clear instruction label which numerical scale is LP/mm and it placed on the middle so it’s created confusion and could be any of the two numerical scale. From your explanation I could understand the right numerical scale is LP/mm. Based on your explanation I could imagine if able to see 5 Individual Peaks in line profile (say at red line position) then my resolution is 3.5 lp/mm. Still not clear what is the purpose of left numerical scale and if their conversion from left to right. Most of the searched found documents lacks in clear practical instruction about its use and might assumed that they user already know how to use it.   Reply Translate  close  Rick Lopez R & D, John Deere - Tech Works Ames, USA, Joined Jul 2011, 220 17:01 Dec-15-2016 https://www.ndt.net/forum/thread.php?msgID=66274#66274 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 16:17 Dec-15-2016 . You are almost on the right track. A simple left-side to right-side horizontal line is not correct. The numbers on the right just tell the user what the horizontal increments on the left side are. For example, if your magnification system allows you to resolve as fine as the 17th increment down, then you would have 16 line-pairs per millimeter resolution.   Reply Translate  close  rhinemine Germany, Joined Dec 2016, 11 18:07 Dec-16-2016 https://www.ndt.net/forum/thread.php?msgID=66286#66286 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to Rick Lopez at 17:01 Dec-15-2016 . Thanks again Rick for clarification. My previous understanding was wrong. So its as you said "numbers on the right are horizontal increments value on the left side are". So need to get horizontal increment position from left scale (lowest position of line signal profile where still can see five distinct individual peaks) and corresponding numerical value (as per right scale) is LP/MM. So right is scale is just aiding to display the left increment value and you can still gauge LP/MM just using the left scale only. When I correlate left increment position to right number only one number still remain odd is number 11. I could not match with it any left horizontal increment. Correct me if I am wrong again. How about when you are in middle or somewhere between two horizontal increment? Assuming just visual interpolation of value. Thanks.   Reply Translate  close  Dr. Uwe Zscherpel Director, BAM Berlin, Germany, Joined Jan 2010, 127 128 11:24 Dec-20-2016 https://www.ndt.net/forum/thread.php?msgID=66304#66304 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 18:07 Dec-16-2016 . Hi, nicely figured out how to read the scale of the converning line pair gauge correctly! But how to measure image unsharpness or basic spatial resolution with this tpye of gauge? The only usefully parameter I found which could be meaured by this type of gauge is the pixel size of the digital image. Exactly for this measurement is was designed in the printing industry about 50 years ago! But this need a correct procedure how to convert the visible line pair resolution in LP/mm into pixel size of mm. So a pixel size of 100 micron corresponds to a maximum of 5 LP/mm. For unsharpness measurements and basic spatial resolution in digital images I recommend ASTM E 2002 or ISO 19232-5 Duplex wire IQIs and the evalustion procedures given in these standards. Best regards Uwe Z.   Reply Translate  close  SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases Subscribe Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Publish Privacy Policy Contact & Imprint About Follow us © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website. More Info Accept top this is debug window

French physicist who pioneered in optics and did much to establish the wave theory of light advanced by English physicist Thomas Young.

Fixed thermal and multi-sensor cameras for condition monitoring and critical equipment monitoring.

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JE Harvey · 1998 · 131 — The grating equation in direction cosine space. As a specific example, consider diffraction from a conventional linear reflection grating. However, suppose ...

The f-number is essentially the size of the hole in the lens that lets light in to the camera. The larger that hole, the more light gets into ...

Mar 24, 2022 — The power of a magnifying lens is just the inverse of its focal length: P = 1 / f. This means that lenses that have short focal lengths have ...

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Thanks again Rick for clarification. My previous understanding was wrong. So its as you said "numbers on the right are horizontal increments value on the left side are". So need to get horizontal increment position from left scale (lowest position of line signal profile where still can see five distinct individual peaks) and corresponding numerical value (as per right scale) is LP/MM. So right is scale is just aiding to display the left increment value and you can still gauge LP/MM just using the left scale only. When I correlate left increment position to right number only one number still remain odd is number 11. I could not match with it any left horizontal increment. Correct me if I am wrong again. How about when you are in middle or somewhere between two horizontal increment? Assuming just visual interpolation of value. Thanks.   Reply Translate  close  Dr. Uwe Zscherpel Director, BAM Berlin, Germany, Joined Jan 2010, 127 128 11:24 Dec-20-2016 https://www.ndt.net/forum/thread.php?msgID=66304#66304 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 18:07 Dec-16-2016 . Hi, nicely figured out how to read the scale of the converning line pair gauge correctly! But how to measure image unsharpness or basic spatial resolution with this tpye of gauge? The only usefully parameter I found which could be meaured by this type of gauge is the pixel size of the digital image. Exactly for this measurement is was designed in the printing industry about 50 years ago! But this need a correct procedure how to convert the visible line pair resolution in LP/mm into pixel size of mm. So a pixel size of 100 micron corresponds to a maximum of 5 LP/mm. For unsharpness measurements and basic spatial resolution in digital images I recommend ASTM E 2002 or ISO 19232-5 Duplex wire IQIs and the evalustion procedures given in these standards. Best regards Uwe Z.   Reply Translate  close  SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases Subscribe Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Publish Privacy Policy Contact & Imprint About Follow us © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website. More Info Accept top this is debug window

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Good Day I am trying to understand the way to measure resolution using line pair gauge. Attached is one of the LP gauge available in web for radiographic image assessment. I could not find any literature explaining the number on left and number of right and their conversion relationship. Assuming my resolution is somewhere in the gauges where five distinct wires are separate visible. Please explain how to assess image resolution at some point in the gauge. Thanks in advance for your time and appreciate your support. Happy Holidays.   Reply Translate  close SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos  Rick Lopez R & D, John Deere - Tech Works Ames, USA, Joined Jul 2011, 220 23:08 Dec-14-2016 https://www.ndt.net/forum/thread.php?msgID=66255#66255 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 22:22 Dec-14-2016 (Opening). A quick Google search shows that some background info can be found here: https://www.nde-ed.org/EducationResources/CommunityCollege/Radiography/AdvancedTechniques/Real_Time_Radiography/ImageQualityIndicators.htm Horizontal lines on left in your photo correlate to increments of line pairs per millimeter resolution of system under test shown on the right (e.g. "I can see no better than the 5th horizontal line", so your resolution is the 5th value down on the right, or 3.5 LP/mm).   Reply Translate  close  rhinemine Germany, Joined Dec 2016, 11 16:17 Dec-15-2016 https://www.ndt.net/forum/thread.php?msgID=66272#66272 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to Rick Lopez at 23:08 Dec-14-2016 . Line Pair GaugeThanks Mr. Lopez for your quick response. The figure of gauge does NOT have clear instruction label which numerical scale is LP/mm and it placed on the middle so it’s created confusion and could be any of the two numerical scale. From your explanation I could understand the right numerical scale is LP/mm. Based on your explanation I could imagine if able to see 5 Individual Peaks in line profile (say at red line position) then my resolution is 3.5 lp/mm. Still not clear what is the purpose of left numerical scale and if their conversion from left to right. Most of the searched found documents lacks in clear practical instruction about its use and might assumed that they user already know how to use it.   Reply Translate  close  Rick Lopez R & D, John Deere - Tech Works Ames, USA, Joined Jul 2011, 220 17:01 Dec-15-2016 https://www.ndt.net/forum/thread.php?msgID=66274#66274 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 16:17 Dec-15-2016 . You are almost on the right track. A simple left-side to right-side horizontal line is not correct. The numbers on the right just tell the user what the horizontal increments on the left side are. For example, if your magnification system allows you to resolve as fine as the 17th increment down, then you would have 16 line-pairs per millimeter resolution.   Reply Translate  close  rhinemine Germany, Joined Dec 2016, 11 18:07 Dec-16-2016 https://www.ndt.net/forum/thread.php?msgID=66286#66286 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to Rick Lopez at 17:01 Dec-15-2016 . Thanks again Rick for clarification. My previous understanding was wrong. So its as you said "numbers on the right are horizontal increments value on the left side are". So need to get horizontal increment position from left scale (lowest position of line signal profile where still can see five distinct individual peaks) and corresponding numerical value (as per right scale) is LP/MM. So right is scale is just aiding to display the left increment value and you can still gauge LP/MM just using the left scale only. When I correlate left increment position to right number only one number still remain odd is number 11. I could not match with it any left horizontal increment. Correct me if I am wrong again. How about when you are in middle or somewhere between two horizontal increment? Assuming just visual interpolation of value. Thanks.   Reply Translate  close  Dr. Uwe Zscherpel Director, BAM Berlin, Germany, Joined Jan 2010, 127 128 11:24 Dec-20-2016 https://www.ndt.net/forum/thread.php?msgID=66304#66304 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 18:07 Dec-16-2016 . Hi, nicely figured out how to read the scale of the converning line pair gauge correctly! But how to measure image unsharpness or basic spatial resolution with this tpye of gauge? The only usefully parameter I found which could be meaured by this type of gauge is the pixel size of the digital image. Exactly for this measurement is was designed in the printing industry about 50 years ago! But this need a correct procedure how to convert the visible line pair resolution in LP/mm into pixel size of mm. So a pixel size of 100 micron corresponds to a maximum of 5 LP/mm. For unsharpness measurements and basic spatial resolution in digital images I recommend ASTM E 2002 or ISO 19232-5 Duplex wire IQIs and the evalustion procedures given in these standards. Best regards Uwe Z.   Reply Translate  close  SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases Subscribe Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Publish Privacy Policy Contact & Imprint About Follow us © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website. More Info Accept top this is debug window

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SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases Subscribe Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Publish Privacy Policy Contact & Imprint About Follow us © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website. More Info Accept top this is debug window

You are almost on the right track. A simple left-side to right-side horizontal line is not correct. The numbers on the right just tell the user what the horizontal increments on the left side are. For example, if your magnification system allows you to resolve as fine as the 17th increment down, then you would have 16 line-pairs per millimeter resolution.   Reply Translate  close  rhinemine Germany, Joined Dec 2016, 11 18:07 Dec-16-2016 https://www.ndt.net/forum/thread.php?msgID=66286#66286 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to Rick Lopez at 17:01 Dec-15-2016 . Thanks again Rick for clarification. My previous understanding was wrong. So its as you said "numbers on the right are horizontal increments value on the left side are". So need to get horizontal increment position from left scale (lowest position of line signal profile where still can see five distinct individual peaks) and corresponding numerical value (as per right scale) is LP/MM. So right is scale is just aiding to display the left increment value and you can still gauge LP/MM just using the left scale only. When I correlate left increment position to right number only one number still remain odd is number 11. I could not match with it any left horizontal increment. Correct me if I am wrong again. How about when you are in middle or somewhere between two horizontal increment? Assuming just visual interpolation of value. Thanks.   Reply Translate  close  Dr. Uwe Zscherpel Director, BAM Berlin, Germany, Joined Jan 2010, 127 128 11:24 Dec-20-2016 https://www.ndt.net/forum/thread.php?msgID=66304#66304 Re: Digital Radiography Line Pair Gauge Resolution Measurement In Reply to rhinemine at 18:07 Dec-16-2016 . Hi, nicely figured out how to read the scale of the converning line pair gauge correctly! But how to measure image unsharpness or basic spatial resolution with this tpye of gauge? The only usefully parameter I found which could be meaured by this type of gauge is the pixel size of the digital image. Exactly for this measurement is was designed in the printing industry about 50 years ago! But this need a correct procedure how to convert the visible line pair resolution in LP/mm into pixel size of mm. So a pixel size of 100 micron corresponds to a maximum of 5 LP/mm. For unsharpness measurements and basic spatial resolution in digital images I recommend ASTM E 2002 or ISO 19232-5 Duplex wire IQIs and the evalustion procedures given in these standards. Best regards Uwe Z.   Reply Translate  close  SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases Subscribe Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Publish Privacy Policy Contact & Imprint About Follow us © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website. More Info Accept top this is debug window

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Hi, nicely figured out how to read the scale of the converning line pair gauge correctly! But how to measure image unsharpness or basic spatial resolution with this tpye of gauge? The only usefully parameter I found which could be meaured by this type of gauge is the pixel size of the digital image. Exactly for this measurement is was designed in the printing industry about 50 years ago! But this need a correct procedure how to convert the visible line pair resolution in LP/mm into pixel size of mm. So a pixel size of 100 micron corresponds to a maximum of 5 LP/mm. For unsharpness measurements and basic spatial resolution in digital images I recommend ASTM E 2002 or ISO 19232-5 Duplex wire IQIs and the evalustion procedures given in these standards. Best regards Uwe Z.   Reply Translate  close  SponsoredPanther 2For integrators, manufacturers, industrial labs, and NDT service providers, Panther™ 2 by Eddyfi... Technologies is the ultimate phased array ultrasonic testing (PAUT) instrument with a complete total focusing method (TFM) toolbox delivering data results faster than any other commercially available solution. With advanced inspection data results made accessible with a complete software ecosystem to suit specific needs, including an open software development kit (SDK), Panther 2 is your go-to for flexible and scalable testing requirements.➤Eddyfi TechnologiesStand12 Showcases10 Videos Product SpotlightOur pocket-sized penetrant systemOur pocket-sized penetrant system is the ideal solution when only small areas need to be inspected..., the environment does not allow for contamination or known areas need to be inspected quickly. In this case, it was a small surface on the one hand and a very sensitive environment on the other that led us to the pen system in our dialogue.➤MR Chemie GmbHStand4 Showcases4 Videos20% off for 100 daysNDT.net is celebrating reaching 100 exhibition members with a special 100-day promotion offering 20%... off on new memberships and additional ads for existing exhibition members. Don't miss this opportunity to increase your visibility in the global NDT community!➤NDT.netStand5 Showcases4 VideosMsS Guided Wave SystemMsS Guided Wave Testing Equipment and its accessoriesGuided Wave Analysis LLCStand3 Showcases9 VideosNovascan 64/128 Portable TFM and Phased Array Flaw DetectorNovascan 64/128 combines TFM, PWI (plane wave), Phased Array detection, and independent TOFD/UT de...tection (dual channels). Multiple groups of TFM and PWI (plane wave) detection can be detected simultaneously with multiple groups of PAUT, UT, and TOFD and displayed on the same screen. The instrument's unique high-end intelligent analysis technology can realize functions such as intelligent identification of defects and high-precision measurement analysis for application scenarios such as corrosion detection, weld detection, composite bonding detection, etc., greatly expanding the instrument's special application fields.➤Guangzhou Doppler Electronic Technologies INCStand40 Showcases57 Videosmore Showcases Subscribe Share... Home Exhibition Archive Forum Jobs Members Events Directory NDT A-Z Advertise Publish Privacy Policy Contact & Imprint About Follow us © NDT.net - Where expertise comes together. The Largest Open Access Portal of Nondestructive Testing (NDT)- since 1996 We use technical and analytics cookies to ensure that we will give you the best experience of our website. More Info Accept top this is debug window

Sep 11, 2023 — The Fresnel lens is a composite compact lens which was developed by a French physicist Augustin-Jean Fresnel for use as lighthouse lenses. Terry ...