ZnSe Meniscus Lenses
ZnSe meniscus lenses for CO2 laser cutting, IR focusing, and aberration control. Send drawings for custom coating review.
Product Overview
Overview
Zinc selenide has low absorption to infrared wavelength and can transmit visible light. It is the preferred material for making infrared lens, window, output coupling mirror and beam expander.
Meniscus Lens Types
Meniscus lens is divided into positive meniscus lens and negative meniscus lens:
- Positive meniscus (convex) lens is designed to reduce spherical aberration. When combined with another lens, the positive meniscus lens can reduce the focal length, so as to increase the numerical aperture (NA) of the system without introducing obvious spherical aberration. When used to converge parallel light, the convex surface of the lens shall face the light source to reduce the spherical aberration.
- Negative meniscus (convex) lens is designed to reduce spherical aberration in optical system. When combined with another lens, the negative meniscus lens can increase the focal length and reduce the numerical aperture (NA) of the system. When used to converge parallel light, the convex surface of the lens shall face the light source to reduce the spherical aberration.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | CVD laser-grade ZnSe |
| Dimension Tolerance | ±0.10 mm |
| Diameter Tolerance | +0/-0.1 mm |
| Thickness Tolerance | ±0.20 mm |
| Clear Aperture | >90% |
| Surface Quality | 60-40 S/D |
| Surface Flatness | λ/2 per 1 inch |
| Parallelism | <1 arc minute |
| Coating | AR coated (10.6 µm typical) |
Typical Specifications for CO2 Laser
| Parameter | Value |
|---|---|
| Type | Meniscus Laser Focal Lens |
| Power Rating | <5000W (5KW) |
| Absorption | <0.17% |
| Coating | 10.6 µm AR Both Sides |
| Diameter Tolerance | +0/-0.13 mm |
| Center Thickness Tolerance | ±0.1 mm |
| Focal Length Tolerance | <1% |
| Clear Aperture | ≥90% Diameter |
| Scratch/Dig | 40-20 |
Applications
Meniscus lenses are commonly used for CO2 laser processing industry, laser cutting, engraving, marking, drilling and other laser systems.
Selection Guidance
Confirm the lens orientation, focal length, beam diameter, coating wavelength, and mounting constraints before ordering.
Request a Quote
Send your drawing and operating wavelength through OPTOstokes-IROptical contact for review.
Technical Parameters
Detailed specifications are not available for this product yet. Please contact the team for application guidance.