The first HeNe laser was developed in 1960 at Bell Labs by Ali Javan, in conjunction with William Bennet Jr. and Donald Herriott. Along the way, the team encountered many issues and setbacks, from melting a laser tube to destroying mirror coatings.

A HeNe laser (also helium-neon laser or he-ne laser) is a type of continuously operating, or continuous-wave (CW) gas laser that uses a mixture of helium and neon gases as the active medium, most commonly emitting light at 632.8 nanometers (red).

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A common problem for HeNe laser customers is the issue of polarization switching, which is the sudden change of the polarization of different modes, especially in shorter tubes, which can be particularly detrimental when operating frequency stabilized HeNe laser tubes. This phenomenon is sometimes referred to as ‘mode hopping.’ However, this is not accurate.

An anti-reflective coating is available for all types of eyeglass lenses, including reading glasses. To include the premium AR treatment, choose either the Standard or Premium option when adding lenses to your frames. You can select these treatment options for single vision, progressive, bifocal, reader, or plano (non-prescription) lenses.

Stable Central Wavelength: The typical emission wavelength of HeNe lasers is about 632.816 nm in air. Very stable oscillation frequency of <1 MHz (<0.001 pm @633 nm) drift is characteristic just to the most sophisticated HeNe lasers, having extra stabilization measures. The central wavelength of non-stabilized lasers can drift in the range  of 1 pm, which is still fairly good, comparing to other laser types.

Anti-glare coatings shield your eyes from external light sources, while anti-reflective coatings react to both external and internal light. Lenses with an anti-reflective coating also work better to filter blue-violet light from sunlight and indoor light. Whether you choose anti-glare or anti-reflective lenses, you’ll appreciate the benefits of reduced glare and reflections in your vision.

While somewhat similar to polarization switching, mode hopping involves (mostly in single-frequency lasers) the laser’s operation on a single resonator mode, which suddenly switches to another mode, causing the optical power to switch over to this new mode. Polarization switching shares this feature of erratic output power. However, with this phenomenon, the output power fluctuations are due to the swapping of the two perpendicularly polarized modes’ polarization states rather than the swapping from one particular mode to another.

Learn about the other lens options available at FramesDirect.com, or call one of our certified opticians at 1-800-248-9427 (Int'l: +1 513-765-2513) to find out more about anti-reflective coating or to add it to your lenses.

High Spectral Purity: HeNe lasing medium features several emission peaks, however it is relatively easy to force the laser to oscillate in just one of the emission bands. Once it is done, no spontaneous emission or emission from other bands is detectable.

With over 25 years experience matching the right laser source to your application, and our wide range of industry-leading HeNe Laser options, the team at RPMC is prepared and eager to help you find the right solution!

Premium anti-reflective treatments also include a superhydrophobic coating that repels dust and resists water, oil, and fingerprints so your lenses are easier to clean. FramesDirect.com offers premium anti-reflective treatment as part of both the Standard and Premium lens options.

Very Bulky: A 35 mW output power HeNe laser is about 1 meter long. It is not cost effective anymore to buy it, nor to store or transport it. Such big but not very powerful lasers are typically used in scientific labs or in some sophisticated holography applications.

The primary purpose of an anti-reflective (AR) treatment for prescription eyewear lenses is to allow more light to pass through the lens and therefore reduce glare. The coating reduces reflections on the lens to reduce distractions and allow you to see more of what’s ahead of you. It also increases your eye comfort while you use digital screens, read, or drive and helps prevent eye fatigue. We strongly recommend an anti-reflective treatment for all lenses.

Use warm, never hot, water and mild soap to clean your anti-glare-coated glasses. As is true for any eyeglass lenses, your primary objective when cleaning anti-glare lenses is to avoid scratching them.

A gas laser light source produces a laser beam by applying a high voltage electrical discharge through a gas (e.g., CO2, Helium-Neon, or Argon-Ion). The gas laser was the first continuous operation laser and the first laser to operate by converting electrical energy to a laser light output.

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These HeNe lasers boast long life, low noise, and high-stability, with many customization options. Because of these features, HeNe lasers are perfect for alignment, Raman spectroscopy, Fabry Perot interferometry, holography, gas sensing, digital imaging, medical and biophotonics applications, other he ne laser experiments, and more!

How to Clean Anti-Glare-Coated Glasses Use warm, never hot, water and mild soap to clean your anti-glare-coated glasses. As is true for any eyeglass lenses, your primary objective when cleaning anti-glare lenses is to avoid scratching them. Using the same steps as you would clean regular eyeglass lenses: Wet your lenses with clean water or an approved eyeglasses cleaning solution. Using a clean microfiber cloth, gently wipe each side of the lens in a circular motion to remove residue. Repeat steps 1 and 2 until the lenses are clean. Available Anti-Reflective Treatments and Lens Options An anti-reflective coating is available for all types of eyeglass lenses, including reading glasses. To include the premium AR treatment, choose either the Standard or Premium option when adding lenses to your frames. You can select these treatment options for single vision, progressive, bifocal, reader, or plano (non-prescription) lenses. Standard Lens Option The Standard lens option includes DuraClear™, a premium anti-reflective treatment that lets in 99% of available light and improves clarity and contrast. Lenses coated with Duraclear help prevent eye strain and are easy to clean, thanks to the superhydrophobic coating. Premium Lens Option The Premium lens option includes Blue-Violet Light Filtering with BlueReflect™ to filter blue-violet light, as well as premium anti-reflective treatment and UV protection. BlueReflect provides clearer vision while you use digital devices. Buying your glasses online can be less expensive than visiting your local optician, and we make the process simple. Are Anti-Reflective Lenses Worth It? For most glasses wearers the benefits of lenses with an anti-reflective coating far outweigh the disadvantages. The long lifespan and everyday vision improvements AR-coated lenses offer are well worth the minor addition to the overall price tag of a new pair of glasses. Learn about the other lens options available at FramesDirect.com, or call one of our certified opticians at 1-800-248-9427 (Int'l: +1 513-765-2513) to find out more about anti-reflective coating or to add it to your lenses. Reviewed by Sonia Kelley, OD, MS on June 27, 2023 Shop All Eyeglasses

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He-Nelaserworking

The gain medium of a HeNe gas laser is a 10:1 gas mixture of helium and neon, pressurized within a glass tube. Applying a DC current to electrodes on opposite ends of the HeNe tube excites helium gas atoms into metastable states. Thus, when excited, helium atoms can efficiently transfer energy to neon atoms with quite similar excitation energies leading to population inversion. Due to the multiple energy levels of neon gas atoms, multiple laser transitions (helium neon laser’s emitted wavelengths) are possible, providing green HeNe lasers, yellow HeNe lasers, red HeNe lasers, and even IR HeNe lasers.

Using the same steps as you would clean regular eyeglass lenses: Wet your lenses with clean water or an approved eyeglasses cleaning solution. Using a clean microfiber cloth, gently wipe each side of the lens in a circular motion to remove residue. Repeat steps 1 and 2 until the lenses are clean.

High Coherence Length: This is very typical to most gas lasers. In case of HeNe, the coherence length varies from 20 cm (for multiple longitudinal modes) to more than 100 m. It all depends on cavity parameters and mirrors and etalons used in the design.

he-nelaserwavelength

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Long Warm-Up Time: Manufacturers specify typical warm-up time of 10 minutes. This might not be a big issue in some applications requiring continuous operation, however in situations where the laser has to be frequently turned on and off, this is a big drawback, which typically means that one has to install mechanical shutters, which open up for laser exposure, i.e. the laser must run continuously, which further decreases life time.

The minor disadvantage to an anti-reflective coating is that it can become marred or scratched over time. Clean your lenses properly and often in order to avoid scratching caused by normal wear and tear, and always store glasses in a case. Besides the minor cost increase the coating adds and a minimal chance for scratching, an AR coating offers no real disadvantages.

Low Output Power: Most powerful HeNe lasers emit 35 to 50 mW of output power. This is low comparing with a 100 mW to 200 mW TEM00 output from some semiconductor lasers. Even frequency stabilized 633 nm lasers emit 70 mW to 100 mW of narrow-linewidth power.

He-Nelaserdiagram

This will not be a comprehensive, step by step laser alignment tutorial for every situation. However this blog will cover a few of these tips and methods, focusing on the benefits of utilizing time-tested, high-quality HeNe lasers to assist in the alignment process. If you are looking for a very in-depth optical alignment tutorial, or have a particularly unique or complicated laser alignment challenge, you may consider looking into a more focused laser alignment training service.

LASOS brings many years of experience and expertise to the design and manufacturing of sophisticated laser systems, with company roots and in-house laser manufacturing dating back to 1966. LASOS’ industry proven HeNe laser sources cover a wide range of applications requiring 543nm, 594nm, and 638.2nm wavelengths. With the closed chain of development, design and manufacturing LASOS is able to adapt to customer’s requirements and deliver solutions that cater specifically to your application requirements.

Short Life-Time: Helium atoms are very important for reducing the lasing threshold of the complete laser. But these atoms are small and tend to diffuse through the walls of the glass tube. Diffusion of He atoms is the main reason of short lifetime of HeNe lasers, which is often in the range of 1000 to 10000 hours, and that is less than 1 year of 24/7 operation. This is considered the main drawback of HeNe lasers in industrial applications.

Low-Cost: Deep traditions of HeNe laser manufacturing and its wide spread in such applications as first barcode scanners and CD players has been driving the cost down and now a laser of 2-3 mW output power costs typically less than 1000 EUR. This is cheap, considering nice and useful characteristics described above.

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Polarization, which is an anti-glare coating that is used on sunglasses only. Many top sunglasses makers, including Maui Jim, will infuse their lenses with polarization and anti-reflective technologies in order to provide the brightest, clearest vision.

The stabilized HeNe lasers we offer boast an excellent TEM00 beam, robust mechanical design, and a long service life of up to 30,000 hours. 543 nm, 594 nm, and 632.8 nm (633 nm) wavelengths are available.

Check out our Online Store: This page contains In-Stock products and an ever-changing assortment of various types of new lasers at marked-down/discount prices.

On average, anti-reflective lens coatings last about two years, but with proper care an AR coating should last the life of the lens. How to Clean Anti-Glare-Coated Glasses Use warm, never hot, water and mild soap to clean your anti-glare-coated glasses. As is true for any eyeglass lenses, your primary objective when cleaning anti-glare lenses is to avoid scratching them. Using the same steps as you would clean regular eyeglass lenses: Wet your lenses with clean water or an approved eyeglasses cleaning solution. Using a clean microfiber cloth, gently wipe each side of the lens in a circular motion to remove residue. Repeat steps 1 and 2 until the lenses are clean. Available Anti-Reflective Treatments and Lens Options An anti-reflective coating is available for all types of eyeglass lenses, including reading glasses. To include the premium AR treatment, choose either the Standard or Premium option when adding lenses to your frames. You can select these treatment options for single vision, progressive, bifocal, reader, or plano (non-prescription) lenses. Standard Lens Option The Standard lens option includes DuraClear™, a premium anti-reflective treatment that lets in 99% of available light and improves clarity and contrast. Lenses coated with Duraclear help prevent eye strain and are easy to clean, thanks to the superhydrophobic coating. Premium Lens Option The Premium lens option includes Blue-Violet Light Filtering with BlueReflect™ to filter blue-violet light, as well as premium anti-reflective treatment and UV protection. BlueReflect provides clearer vision while you use digital devices. Buying your glasses online can be less expensive than visiting your local optician, and we make the process simple. Are Anti-Reflective Lenses Worth It? For most glasses wearers the benefits of lenses with an anti-reflective coating far outweigh the disadvantages. The long lifespan and everyday vision improvements AR-coated lenses offer are well worth the minor addition to the overall price tag of a new pair of glasses. Learn about the other lens options available at FramesDirect.com, or call one of our certified opticians at 1-800-248-9427 (Int'l: +1 513-765-2513) to find out more about anti-reflective coating or to add it to your lenses. Reviewed by Sonia Kelley, OD, MS on June 27, 2023 Shop All Eyeglasses

Parts of the microscope and their function ; Condenser, Aids in focusing of the light onto the specimen ; Iris diaphragm, A shutter that adjusts the amount of ...

High Voltage: HeNe lasers often use voltages above 1500 V. Such high voltages create certain risks for people and equipment around.

He-Nelaserratio

The Premium lens option includes Blue-Violet Light Filtering with BlueReflect™ to filter blue-violet light, as well as premium anti-reflective treatment and UV protection. BlueReflect provides clearer vision while you use digital devices. Buying your glasses online can be less expensive than visiting your local optician, and we make the process simple.

The Standard lens option includes DuraClear™, a premium anti-reflective treatment that lets in 99% of available light and improves clarity and contrast. Lenses coated with Duraclear help prevent eye strain and are easy to clean, thanks to the superhydrophobic coating.

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Laser alignment can be a challenging task, but aligning a laser beam doesn’t have to be as complicated as it might seem with the right optical alignment tools and proper laser alignment techniques. Multiple optical alignment techniques have been developed over the years, utilized by technicians and engineers to simplify the alignment process. With the development of these universal laser beam alignment methods, along with some laser alignment tips and tricks, you don’t need to be a laser expert to perform your alignments with relative ease, ensuring your laser beam path is right where you want it to be and your beam is on target every time.

wavelength of he-nelaserin cm

There are many types of gas lasers. We currently offer a selection of Helium-Neon (HeNe / He-Ne) laser tubes and modules. These gas lasers feature a robust mechanical design, excellent beam quality, and a variety of configurations. Furthermore, HeNe laser wavelengths are available in the Green, Yellow, and Red spectral ranges, with output powers up to 20mW.

Learn More About HeNe Lasers A gas laser light source produces a laser beam by applying a high voltage electrical discharge through a gas (e.g., CO2, Helium-Neon, or Argon-Ion). The gas laser was the first continuous operation laser and the first laser to operate by converting electrical energy to a laser light output. The gain medium of a HeNe gas laser is a 10:1 gas mixture of helium and neon, pressurized within a glass tube. Applying a DC current to electrodes on opposite ends of the HeNe tube excites helium gas atoms into metastable states. Thus, when excited, helium atoms can efficiently transfer energy to neon atoms with quite similar excitation energies leading to population inversion. Due to the multiple energy levels of neon gas atoms, multiple laser transitions (helium neon laser’s emitted wavelengths) are possible, providing green HeNe lasers, yellow HeNe lasers, red HeNe lasers, and even IR HeNe lasers.  He Ne Laser Diagram Our He Ne Laser Products: LASOS brings many years of experience and expertise to the design and manufacturing of sophisticated laser systems, with company roots and in-house laser manufacturing dating back to 1966. LASOS’ industry proven HeNe laser sources cover a wide range of applications requiring 543nm, 594nm, and 638.2nm wavelengths. With the closed chain of development, design and manufacturing LASOS is able to adapt to customer’s requirements and deliver solutions that cater specifically to your application requirements. There are many types of gas lasers. We currently offer a selection of Helium-Neon (HeNe / He-Ne) laser tubes and modules. These gas lasers feature a robust mechanical design, excellent beam quality, and a variety of configurations. Furthermore, HeNe laser wavelengths are available in the Green, Yellow, and Red spectral ranges, with output powers up to 20mW. The stabilized HeNe lasers we offer boast an excellent TEM00 beam, robust mechanical design, and a long service life of up to 30,000 hours. 543 nm, 594 nm, and 632.8 nm (633 nm) wavelengths are available. Standard and customized models are available with a host of options including single-mode or multimode, random or linear polarization, Brewster window tubes, fiber-coupling, and frequency stability. We also offer HeNe laser power supplies. All models can be provided with either a laboratory HeNe power supply, or one of three OEM power supply versions. Deeper Dive into HeNe Lasers He Ne Laser Applications: These HeNe lasers boast long life, low noise, and high-stability, with many customization options. Because of these features, HeNe lasers are perfect for alignment, Raman spectroscopy, Fabry Perot interferometry, holography, gas sensing, digital imaging, medical and biophotonics applications, other he ne laser experiments, and more! Laser Beam Alignment: Laser alignment can be a challenging task, but aligning a laser beam doesn’t have to be as complicated as it might seem with the right optical alignment tools and proper laser alignment techniques. Multiple optical alignment techniques have been developed over the years, utilized by technicians and engineers to simplify the alignment process. With the development of these universal laser beam alignment methods, along with some laser alignment tips and tricks, you don’t need to be a laser expert to perform your alignments with relative ease, ensuring your laser beam path is right where you want it to be and your beam is on target every time. This will not be a comprehensive, step by step laser alignment tutorial for every situation. However this blog will cover a few of these tips and methods, focusing on the benefits of utilizing time-tested, high-quality HeNe lasers to assist in the alignment process. If you are looking for a very in-depth optical alignment tutorial, or have a particularly unique or complicated laser alignment challenge, you may consider looking into a more focused laser alignment training service. Read the full article here. Why is Polarization Switching Unsuitable for Interferometry? A common problem for HeNe laser customers is the issue of polarization switching, which is the sudden change of the polarization of different modes, especially in shorter tubes, which can be particularly detrimental when operating frequency stabilized HeNe laser tubes. This phenomenon is sometimes referred to as ‘mode hopping.’ However, this is not accurate. While somewhat similar to polarization switching, mode hopping involves (mostly in single-frequency lasers) the laser’s operation on a single resonator mode, which suddenly switches to another mode, causing the optical power to switch over to this new mode. Polarization switching shares this feature of erratic output power. However, with this phenomenon, the output power fluctuations are due to the swapping of the two perpendicularly polarized modes’ polarization states rather than the swapping from one particular mode to another. Read the full article here. He Ne Lasers vs Diode Lasers: There have been many discussions around whether or not diodes will replace HeNe lasers. However, while this may be plausible for certain applications, the superior beam quality, long service lifetime, low noise, high stability, long coherence length and competitive helium neon laser cost ensures a solid foothold in applications where enhanced performance and excellent beam quality is critical.  Advantages of HeNe Lasers High Coherence Length: This is very typical to most gas lasers. In case of HeNe, the coherence length varies from 20 cm (for multiple longitudinal modes) to more than 100 m. It all depends on cavity parameters and mirrors and etalons used in the design. Stable Central Wavelength: The typical emission wavelength of HeNe lasers is about 632.816 nm in air. Very stable oscillation frequency of <1 MHz (<0.001 pm @633 nm) drift is characteristic just to the most sophisticated HeNe lasers, having extra stabilization measures. The central wavelength of non-stabilized lasers can drift in the range  of 1 pm, which is still fairly good, comparing to other laser types. High Spectral Purity: HeNe lasing medium features several emission peaks, however it is relatively easy to force the laser to oscillate in just one of the emission bands. Once it is done, no spontaneous emission or emission from other bands is detectable. Good Beam Quality and Alignment: The longer is the gas tube, the easier it is to get good Gaussian beam profile, good beam quality and very good angular and spatial alignment with respect to the laser housing. Low-Cost: Deep traditions of HeNe laser manufacturing and its wide spread in such applications as first barcode scanners and CD players has been driving the cost down and now a laser of 2-3 mW output power costs typically less than 1000 EUR. This is cheap, considering nice and useful characteristics described above. Drawbacks of HeNe Lasers Short Life-Time: Helium atoms are very important for reducing the lasing threshold of the complete laser. But these atoms are small and tend to diffuse through the walls of the glass tube. Diffusion of He atoms is the main reason of short lifetime of HeNe lasers, which is often in the range of 1000 to 10000 hours, and that is less than 1 year of 24/7 operation. This is considered the main drawback of HeNe lasers in industrial applications. Long Warm-Up Time: Manufacturers specify typical warm-up time of 10 minutes. This might not be a big issue in some applications requiring continuous operation, however in situations where the laser has to be frequently turned on and off, this is a big drawback, which typically means that one has to install mechanical shutters, which open up for laser exposure, i.e. the laser must run continuously, which further decreases life time. Low Output Power: Most powerful HeNe lasers emit 35 to 50 mW of output power. This is low comparing with a 100 mW to 200 mW TEM00 output from some semiconductor lasers. Even frequency stabilized 633 nm lasers emit 70 mW to 100 mW of narrow-linewidth power. Very Bulky: A 35 mW output power HeNe laser is about 1 meter long. It is not cost effective anymore to buy it, nor to store or transport it. Such big but not very powerful lasers are typically used in scientific labs or in some sophisticated holography applications. High Voltage: HeNe lasers often use voltages above 1500 V. Such high voltages create certain risks for people and equipment around. Read the full article here. A Brief History of the HeNe Laser: The first HeNe laser was developed in 1960 at Bell Labs by Ali Javan, in conjunction with William Bennet Jr. and Donald Herriott. Along the way, the team encountered many issues and setbacks, from melting a laser tube to destroying mirror coatings. Late one snowy day in December, 1960, after many failed tests and disappointments, the team discussed their predicament. As the discussion progressed, Herriott continued tweaking the mirror alignment, when suddenly…. it happened! Javan looked over at the oscilloscope as Herriott was making his adjustments, and to his great delight, saw the signal displayed that they were waiting for. They had finally dialed in the tube alignment for a stable output, emitting in the infrared (IR) region at 1153nm. It was the first gas laser and the first laser with CW output. However, a laser emitting IR radiation didn’t have much demand at the time, and the research continued, seeking a laser configuration emitting radiation in the visible spectrum. In early 1962, a mere eighteen months later, the tried-and-true 632.8nm HeNe laser was developed. Read the full article here. Let Us Help RPMC Lasers is your HeNe Laser Supplier. We provide industry-leading HeNe Laser Tubes, HeNe Laser Modules, and HeNe Laser Power Supplies. The tried-and-true HeNe laser has been around forever as a staple in the laser lab with their excellent beam quality and long service life. These proven, reliable HeNe lasers are readily available with quick turnaround, perfect as a drop-in replacement! With over 25 years experience matching the right laser source to your application, and our wide range of industry-leading HeNe Laser options, the team at RPMC is prepared and eager to help you find the right solution! If you have any questions, or if you would like some assistance please Contact Us here. Furthermore, you can email us at [email protected] to talk to a knowledgeable Product Manager. Alternatively, use the filters on this page to assist in narrowing down the selection of HeNe lasers for sale. Finally, head to our Knowledge Center with our Lasers 101 page and Blogs, Whitepapers, and FAQ pages for further, in-depth reading. Check out our Online Store: This page contains In-Stock products and an ever-changing assortment of various types of new lasers at marked-down/discount prices.

helium-neonlaserpdf

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Standard and customized models are available with a host of options including single-mode or multimode, random or linear polarization, Brewster window tubes, fiber-coupling, and frequency stability.

Alternatively, use the filters on this page to assist in narrowing down the selection of HeNe lasers for sale. Finally, head to our Knowledge Center with our Lasers 101 page and Blogs, Whitepapers, and FAQ pages for further, in-depth reading.

he-nelaseris which levellaser

However, a laser emitting IR radiation didn’t have much demand at the time, and the research continued, seeking a laser configuration emitting radiation in the visible spectrum. In early 1962, a mere eighteen months later, the tried-and-true 632.8nm HeNe laser was developed. Read the full article here.

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If you have any questions, or if you would like some assistance please Contact Us here. Furthermore, you can email us at [email protected] to talk to a knowledgeable Product Manager.

Late one snowy day in December, 1960, after many failed tests and disappointments, the team discussed their predicament. As the discussion progressed, Herriott continued tweaking the mirror alignment, when suddenly…. it happened! Javan looked over at the oscilloscope as Herriott was making his adjustments, and to his great delight, saw the signal displayed that they were waiting for. They had finally dialed in the tube alignment for a stable output, emitting in the infrared (IR) region at 1153nm. It was the first gas laser and the first laser with CW output.

Anti-reflective coatings help to reduce eye strain and fatigue and increase comfort while using screens and driving. This is extremely important if you spend any significant time driving at night, whether commuting, working, or going out to dinner. With fewer reflections, more light can reach your eyes, improving visual acuity and reducing many risks associated with nighttime driving.

he-nelaserconstructionandworking

RPMC Lasers is your HeNe Laser Supplier. We provide industry-leading HeNe Laser Tubes, HeNe Laser Modules, and HeNe Laser Power Supplies. The tried-and-true HeNe laser has been around forever as a staple in the laser lab with their excellent beam quality and long service life. These proven, reliable HeNe lasers are readily available with quick turnaround, perfect as a drop-in replacement!

Good Beam Quality and Alignment: The longer is the gas tube, the easier it is to get good Gaussian beam profile, good beam quality and very good angular and spatial alignment with respect to the laser housing.

For most glasses wearers the benefits of lenses with an anti-reflective coating far outweigh the disadvantages. The long lifespan and everyday vision improvements AR-coated lenses offer are well worth the minor addition to the overall price tag of a new pair of glasses.

We also offer HeNe laser power supplies. All models can be provided with either a laboratory HeNe power supply, or one of three OEM power supply versions.

There have been many discussions around whether or not diodes will replace HeNe lasers. However, while this may be plausible for certain applications, the superior beam quality, long service lifetime, low noise, high stability, long coherence length and competitive helium neon laser cost ensures a solid foothold in applications where enhanced performance and excellent beam quality is critical.