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All Products / Popular Brands / ISP Optics / ISP Optics Infrared Lenses / ISP Optics Zinc Selenide (ZnSe) Meniscus Lenses
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25.4mm Dia. x 76.2mm FL, 8 - 12µm BBAR Coated, ISP Optics Zinc Selenide (ZnSe) Meniscus Lens | AR812-ZC-PM-25-76

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Diameter (mm):
25.40 +0.00/-0.13
Effective Focal Length EFL (mm):
76.20 @ 10.6μm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Zinc Selenide (ZnSe), CVD Grade
f/#:
3.00
Numerical Aperture NA:
0.17
Coating:
BBAR (8000-12000nm)
Type:
Meniscus Lens
Wavelength Range (nm):
8000 - 12000
Center Thickness CT (mm):
2.80 ±0.20
Centering (arcmin):
<3
Clear Aperture (%):
90
Clear Aperture CA (mm):
22.86
Coating Specification:
Ravg <0.5% @ 8 - 12μm
Rabs <1% @ 8 - 12μm
Edge Thickness ET (mm):
2.00
Focal Length Tolerance (%):
±2
Model Number:
AR812-ZC-PM-25-76
Radius R1 (mm):
179.47
Radius R2 (mm):
68.23
Surface Quality:
60-40
Irregularity (P-V) @ 10.6μm:
λ/20

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 240:
Compliant
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Product Family Description

  • Positive or Negative Meniscus Lenses
  • CVD Grade Zinc Selenide (ZnSe) Ideal for CO2 Systems
  • Uncoated or BBAR Coated for 8 – 12µm

ISP Optics Zinc Selenide (ZnSe) Meniscus Lenses feature positive and negative meniscus designs that minimize spherical aberration. Positive meniscus lenses enable smaller spot sizes than possible with PCX lenses, making them ideal for use in CO2 laser applications for precise marking or cutting. Negative meniscus lenses are used to increase the focal length when used with additional lenses, decreasing the numerical aperture of an optical system. ISP Optics Zinc Selenide (ZnSe) Meniscus Lenses are available in standard imperial sizes either uncoated or Broadband Anti-Reflection (BBAR) coated for enhanced transmission from 8 – 12µm.