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All Products / Optics / Optical Lenses / Infrared (IR) Lenses / Germanium Meniscus 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

25mm Dia. x 25mm FL, 3-5μm Coated Germanium Meniscus Lens

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Stock #87-961 3-5 days
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A$830.40
Qty 1-5
A$830.40
Qty 6+
A$664.32
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Diameter (mm):
25.00 +0.0/-0.1
Effective Focal Length EFL (mm):
25.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Germanium (Ge)
f/#:
1.00
Numerical Aperture NA:
0.50
Coating:
BBAR (3000-5000nm)
Type:
Meniscus Lens
Wavelength Range (nm):
3000 - 5000
Back Focal Length BFL (mm):
23.34
Center Thickness CT (mm):
2.50
Center Thickness Tolerance (mm):
±0.10
Centering (arcmin):
<3
Clear Aperture (%):
90.00
Coating Specification:
Ravg <3.0% @ 3 - 5μm
Edge Thickness ET (mm):
1.3
Focal Length Specification Wavelength (μm):
10.6
Radius R1 (mm):
28.32
Radius R2 (mm):
42.46
Surface Quality:
60-40
Wavelength Range (μm):
3 - 5

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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REACH 241:
Compliant
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Product Family Description

  • Wavelength Range of 2 - 16μm
  • Durable Design for Demanding Applications
  • Superior Spherical Correction
  • Due to material supply chain disruptions with germanium, there may be increased lead times and price changes on our germanium products. For more information, please contact our customer service team.

TECHSPEC® Germanium Meniscus Lenses are designed for demanding infrared applications including infrared imaging or surveillance, remote sensing, or infrared spectroscopy. TECHSPEC Germanium Meniscus Lenses offer superior spherical correction and smaller spot sizes than comparable focal length TECHSPEC Germanium PCX Lenses. These meniscus lenses are offered uncoated or anti-reflection coated for increased performance in the designated coating wavelength range.

Technical Information

AR COATED GERMANIUM

Typical transmission of a 3mm thick Ge window with BBAR (3000-5000nm) coating at 0° AOI.

The blue shaded region indicates the coating design wavelengh range, with the following specification: 

Ravg <3% @ 3000 - 5000nm

Data outside this range is not guaranteed and is for reference only.

Click Here to Download Data

Typical transmission of a 3mm thick Ge window with BBAR (3000-12000nm) coating at 0° AOI.

The blue shaded region indicates the coating design wavelengh range, with the following specification: 

Ravg <5.0% @ 3 - 12μm

Data outside this range is not guaranteed and is for reference only.

Click Here to Download Data

Typical transmission of a 3mm thick Ge window with BBAR (8000-12000nm) coating at 0° AOI.

The blue shaded region indicates the coating design wavelengh range, with the following specification: 

Ravg <3.0% @ 8 - 12μm

Data outside this range is not guaranteed and is for reference only.

Click Here to Download Data