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All Products / Optics / Optical Lenses / Aspheric Lenses / Infrared / Zinc Selenide (ZnSe) Aspheric Lenses
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25.4mm Dia. x 20.0mm FL, 8-12µm AR Coated, ZnSe Aspheric Lens

See More by Coherent®
TECHSPEC Zinc Selenide (ZnSe) Aspheric Lenses

TECHSPEC Zinc Selenide (ZnSe) Aspheric Lenses

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Stock #39-515 3-4 days
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£1,015.58
Qty 1-10
£1,015.58
Qty 11+
£914.02
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Specifications

General

Type:
Aspheric Lens

Physical & Mechanical Properties

Diameter (mm):
25.40 +0.00/-0.10
Centering (arcmin):
≤3
Centering, ETD (μm):
≤12.7
Clear Aperture CA (mm):
22.86
Edge Thickness ET (mm):
2.23
Center Thickness CT (mm):
5.00 ±0.10
Bevel:
Protective bevel as needed
Shape of Back Surface:
Plano
Surface Roughness (Å):
<50 RMS

Optical Properties

Effective Focal Length EFL (mm):
20.00
Numerical Aperture NA:
0.64
Back Focal Length BFL (mm):
17.92
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Coherent® Infrared ZnSe
Asphere Figure Error, RMS @ 632.8nm:
λ/2
Coating:
BBAR (8000-12000nm)
Coating Specification:
Ravg <0.5% @ 8 - 12μm
Surface Quality:
40-20
f/#:
0.78
Wavelength Range (nm):
8000 - 12000
Conjugate Distance:
Infinite
Power (P-V) @ 632.8nm:
λ/10

Electrical

Power (P-V) @ 10.6μm:
λ/10

Regulatory Compliance

RoHS 2015:
Compliant
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Reach 224:
Compliant
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Certificate of Conformance:
View
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Product Details

  • Edmund Optics Designed, Coherent® Manufactured
  • Premier Grade ZnSe Material
  • Uncoated or Broadband 8-12µm AR Coating Available

TECHSPEC® Zinc Selenide (ZnSe) Aspheric Lenses are designed to provide diffraction-limited focusing performance for 10.6µm CO2 lasers. Manufactured from Coherent® Infrared ZnSe material featuring <0.0005 cm-1 bulk absorption at 10.6µm, these lenses are available uncoated or with a broadband anti-reflection coating providing superior transmission from 8 - 12µm. The precision designs are ideal for integration into laser systems, thermal imaging assemblies, and FTIR devices. TECHSPEC Zinc Selenide Aspheric Lenses feature an irregularity of <λ/20 at 10.6µm, 40-20 surface quality, and <50Å surface roughness.

Notes: II-VI Incorporated is now Coherent Corp.

Special care should be taken when handling Zinc Selenide as it is a toxic material. Always wear rubber or plastic gloves to avoid risk of contamination.
 

Technical Information

Special Handling

These optics require special handling to avoid damage and ensure long-term performance. Proper handling, cleaning, and storage are essential to maintain optical quality. Explore our Optics Cleaning Resources for step-by-step guides and best practices. For personalized assistance, Email us or Chat with our technical support team.

Component Handling Tools
Component Handling Tools

Custom

Edmund Optics offers comprehensive custom manufacturing services for optical and imaging components tailored to your specific application requirements. Whether in the prototyping phase or preparing for full-scale production, we provide flexible solutions to meet your needs. Our experienced engineers are here to assist—from concept to completion.

Our capabilities include:

  • Custom dimensions, materials, coatings, and more
  • High-precision surface quality and flatness
  • Tight tolerances and complex geometries
  • Scalable production—from prototype to volume

Learn more about our custom manufacturing capabilities or submit an inquiry here.

Compatible Mounts