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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25mm Dia x 12.5mm FL 3-5μm Coated, Hybrid Ge Aspheric Lens

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Stock #68-259
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€920,00 €782,00
Qty 1-5
€920,00 €782,00
Qty 6+
€723,00 €614,55
Volume Pricing
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Specifications

Diameter (mm):
25.00 +0.0/-0.1
Effective Focal Length EFL (mm):
12.50 @ 4000nm
Numerical Aperture NA:
1.00
Back Focal Length BFL (mm):
11.56
Center Thickness CT (mm):
4.22 ±0.10
Coating:
BBAR (3000-5000nm)
Coating Specification:
Ravg <3.0% @ 3 - 5μm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Germanium (Ge)
Clear Aperture CA (mm):
24.0
Surface Accuracy, P-V (μm):
0.3
Surface Quality:
60-40
Edge Thickness ET (mm):
1.22
Centering (arcmin):
≤5
Bevel:
Protective bevel as needed
f/#:
0.5
Edges:
Diamond Turned
Radius R2 (mm):
440.2
Shape of Back Surface:
Convex
Wavelength Range (nm):
3000 - 5000
Conjugate Distance:
Infinite
Focal Length Specification Wavelength (nm):
4000
Asphere Figure Error, RMS @ 632.8nm:
λ/6

Regulatory Compliance

RoHS:

Learn More

Product Family Description

  • Color Corrected for 3 – 5μm
  • Near Diffraction Limited Focusing Performance
  • Full Prescription Data Available

Our TECHSPEC® Germanium Infrared (IR) Hybrid Aspheric Lenses provide diffraction limited focusing performance at any wavelength in the 3 – 5μm region, and near diffraction limited performance when used over the entire 3 -5μm spectral range. They are ideal for integration into imaging applications, FTIR spectrometers, or any Mid-Wave IR application utilizing a broad band light source.

Each hybrid aspheric lens is coated for >95% transmission for the most efficient use of costly infrared illumination. However, transmission is limited by the inherent diffraction efficiency of the aspheric surface, yielding lower overall transmission at the extremes of the design spectral band. For custom design or coating options, please contact our Sales Department.

Technical Information

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