Yes, there is a difference between a fisheye and a wide-angle lens. A definition from the Smith's Modern Optical Engineering, Fourth Edition, page 718, is:

Part No.RC & EFL Centration Range (mm)Measuring AccuracyMax Sample Aperture (mm)Centration Measuring FixtureDimension (mm)SCT-500±3 – ±500±1″100Electric motor drive, V-shaped fixture500 x 400 x 1100SCT-1000±3 – ±1000±1″100Electric motor drive, V-shaped fixture500 x 400 x 1100SCT-2000±3 – ±2000±1″100Electric motor drive, V-shaped fixture500 x 400 x 1100ACT-500±3 – ±500±1″400Air bearing rotary table, 3-jaw chunk, 4-D regulator500 x 400 x 1100ACT-1000±3 – ±1000±1″400Air bearing rotary table, 3-jaw chunk, 4-D regulator500 x 400 x 1100ACT-2000±3 – ±2000±1″400Air bearing rotary table, 3-jaw chunk, 4-D regulator500 x 400 x 1100

Goniometers consist of a high precision air-bearing turntable, high accuracy angle sensor and an autocollimator. It is helpful in the absolute measurement of any dihedral angle from 0° to 180° and any 3-D turn angle from 0° to 360°, the beam bending angle of an optical device and the material refractive index. They are applicable in a high-precision test of a rectangular prism, pentagonal prism, polygonal prism and other optical prisms and all kinds of precision measurement blocks and also used in high-precision optical system debugging and the precise positioning of the space of an optical device.

Optical Axis: Vertical/Horizontal, Turning light pathEFL Repeatability: 0.03% – 0.2%EFL Accuracy: 0.1% – 0.3% @ 3 – 25mm / 0.03% – 0.1% @ 25 – 500mm / 0.1% – 0.3% @ 500 – 1000mmBFL & RC Repeatability: 0.02% – 0.2%BFL & RC Accuracy: 0.05% – 0.3%On-Axis MTF Repeatability: ±0.02On-Axis Accuracy: ±0.05Light: Cold Light @ 546.1nm/LED Light

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Focometer is helpful for the measurement of EFL (Effective Focal Length), RC (Radius Curvature), BFL (Back Focal Length), On-axis MTF (Modulation Transfer Function) and Parallelism of optical components having aperture less than 80mm. WOE offers two versions (FMV & FMHT) of Focometer based on the state of the Optical Axis (Vertical/Horizontal).

The formula for angular magnification is: M = α i α o = D d i + 1 The near point for a standard eye is generally taken to be 25 cm. So, D = 25 cm, and we have ...

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Fisheye Lenses with 180°+ Field of View do not always provide 180° FoV if used with a smaller sensor.For example, a Fisheye with Full Coverage can provide much smaller fields of view such as 160° Diagonal, where they act as a "Wide Angle" Lens.The reason for this is the "Fisheye Fill Factor" which has six different general categories.

Part No.Optical AxisEFL range (mm)BFL & RC range (mm)Parallelism Test AccuracyMax Sample Aperture (mm)On-Axis MTF Aperture (mm)DimensionFMV-500Vertical±3 – ±500±3 – ±5001″80< 30500 x 400 x 1100FMV-1000Vertical±3 – ±1000±3 – ±5001″80< 30500 x 400 x 1100FMV-2000Vertical±3 – ±2000±3 – ±5001″80< 30500 x 400 x 1100FMHT-500Horizontal, Turning light path±3 – ±500±3 – ±5001″80< 301350 x 300 x 460FMHT-1000Horizontal, Turning light path±3 – ±1000±3 – ±5001″80< 301350 x 300 x 460FHMT-2000Horizontal, Turning light path±3 – ±2000±3 – ±5001″80< 301350 x 300 x 460

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Part No.ResolutionRepeatabilityAccuracyTurntable Dia (mm)Air ConsumptionWeight (Kg)Data InterfaceGM-Pro0.041″±0.5″±1″20080L/min45DB62, USB2.0GM-Base0.24″±1″±3″20080L/min45DB62, USB2.0GM-Mac1″10″20″200–30USB2.0

Optical distortion is a third order transverse aberration. The simple explanation is that distortion is the change in magnification (angular resolution) versus image height.Distortion is present in all fisheye lenses and most wide-angle lenses.Rule of Thumb 1: A lens with greater distortion has greater field of view than another lens which has the same Effective Focal Length.Rule of Thumb 2: The smaller the field of view, the less apparent optical distortion is.

Optical metrology instruments are precision tools designed for the measurement and alignment of optical components, ensuring high accuracy in various applications.

Distortion is the change in magnification and angular resolution as a function of field angle in an image.Optical Distortion, Wide Angle, and Fisheye are used when discussing lenses that provide a large field of view.

Optical distortion is a third order transverse aberration. The simple explanation is that distortion is the change in magnification (angular resolution) versus image height.Distortion is present in all fisheye lenses and most wide-angle lenses.Additionally, distortion is a function of field angle, and usually increases as field increases.Rule of Thumb 1: A lens with greater distortion has greater field of view than another lens which has the same Effective Focal Length.Rule of Thumb 2: The smaller the field of view, the less apparent optical distortion is.The distortion profile of a lens dramatically changes the field of view output from a camera system. In the below charts you can see that a 1.9mm lens can provide anywhere from 106° Field of View to 180°+ Field of View at 5.0mm image circle.

SCT series is used for centration measuring of single-lens with aperture less than 100mm using V-shaped fixture. ACT series is used for centring assembly and centration measuring of spherical and cylindrical optics of aperture less than 400mm (or can be customized) using air bearing turntable and 4-D regulator with high-precision and ultra-high accuracy.

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Jul 27, 2023 — Parallel Resonant Bandpass Filters. A bandpass filter using a parallel resonant circuit is shown in Figure 4. In this case, the output voltage ...

Pei, et. al. "Effects of Image Degradations to CNN-based Image Classification" Li, et.al. 2020, “ULSD: Unified Line Segment Detection across Pinhole, Fisheye, and Spherical Cameras”​

Mixed helium–neon lasers will give lines at 534, 594, 612 and 632 nm. Finally in the gas laser class are the helium–cadmium lasers which give lines in the ...

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Therefore, a Fisheye Lens can be a Wide Angle Lens when an image sensor smaller than the image circle is used. A Wide Angle Lens is not necessarily a Fisheye Lens.GoPro's marketing team was stuck with "Fisheye" because the first product used a cropped Fisheye lens. The newer GoPros use Wide Angle lenses which are not Fisheye lenses.

Autocollimators measure small angles with high-precision and have stable performance, greater accuracy with easy accessibility. Wavelength Opto-Electronic offer multiples series of Autocollimator such as Base, Std, Pro and Laser based on the accuracy degree. The Laser series uses a laser source, and the others use a white light source. The Laser series has an additional field for CCD chip positioning for the laser high power property. They are useful for optical aligning, precision angle measuring, straightness, parallelism, squareness and flatness measuring purposes.

Le Joint Torique de référence OR-80X1.25-NBR70 possède un diamètre intérieur de 80 mm et une épaisseur de 1.25 mm. Il est fabriqué en matière NBR.

With the latest innovation IDS NXT, the complete system for the use of intelligent cameras to make it easier to access AI-based image processing. Filter.

DEPSTECH 5.5mm Lens Industrial Endoscope Camera 1080P Digital Inspection Camera · botasy1988 (7188) · 99.3% positive feedback.

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Distortion changes the scale of objects at different parts of the field of view. Additionally, the scale changes both radially and tangentially, causing object deformation.CNN-based methods should ideally be trained on data that has the distortion profile used by your embedded vision system. Otherwise, activations will occur in incorrect locations.

Measuring Mode: Transmittance (RC: Radius Curvature) / Reflectance (EFL: Effective Focal Length)EFL Accuracy: 0.1% – 0.3% @ 3-25mm / 0.03% – 0.1% @ 25 – 500mm / 0.1% – 0.3% @ 500-1000mmLight: Cold Light & LED Light

Quick Reference. Applied to observations in optical microscopy which use parallel beams of light passing through the atomic structure of a crystal. This is the ...

Measuring Angle: Dihedral angle: 0° – 180° / Arbitrary angle: 0° – 360°Turntable Diameter: 200mmAuto Collimator Focal Length: 200mmAuto Collimator Aperture: 30mm

Part No.Focal Length (mm)ResolutionRepeatabilityAccuracy ±20″Accuracy ±900″Aperture (mm)Field of ViewWorking Range (m)Data Interface @ 5VACM-160-Base1600.02″0.10″0.3″0.5″304000″ x3250″8USB2.0ACM-200-Base2000.02″0.10″0.3″0.5″30/553200″ x 2600″10/30USB2.0ACM-300-Base3000.02″0.10″0.3″0.5″40/552100″ x 1700″20/30USB2.0ACM-200-Std2000.01″0.03″0.1″0.3″30/553400″ x 2600″10/30USB3.0ACM-300-Std3000.01″0.03″0.1″0.3″40/552230″ x 1700″20/30USB3.0ACM-500-Std5000.01″0.03″0.1″0.3″601300″ x 950″30USB3.0ACM-300-Pro3000.01″0.02″0.1″0.1″402230″ x 1700″20USB3.0ACM-500-Pro5000.01″0.02″0.1″0.1″601300″ x 950″30USB3.0ACM-200-Laser2000.30″0.50″1.0″1.0″303200″ x 2600″10USB2.0ACM-300-Laser3000.10″0.30″0.5″0.5″402100″ x 1700″30USB2.0