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25mm Dia x 100mm FL 3-5μm Coated, Hybrid Ge Aspheric Lens

Stock #68-267
€670.00
Qty 1-5
€670.00
Qty 6
€536.00
Volume Pricing
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Diameter (mm):
25.00 +0.0/-0.1
Effective Focal Length EFL (mm):
100.00
Numerical Aperture NA:
0.13
Back Focal Length BFL (mm):
97.73
Focal Length Specification Wavelength (nm):
4000
Center Thickness CT (mm):
2.50 ±0.10
Coating:
BBAR (3000-5000nm)
Coating Specification:
Ravg <3.0% @ 3 - 5μm
Substrate:
Germanium (Ge)
Clear Aperture CA (mm):
24.0
Asphere Figure Error (μm RMS):
0.1
Surface Accuracy, P-V (μm):
0.3
Surface Quality:
60-40
Edge Thickness ET (mm):
2.23
Centering (arcmin):
≤5
Bevel:
Protective bevel as needed
f/#:
3.85
Coefficient of Thermal Expansion CTE (10-6/°C):
6.1
Edges:
Diamond Turned
Index of Refraction nd:
4.002 @ 11µm
Radius R2 (mm):
111
Shape of Back Surface:
Concave
Type:
Aspheric Lens
Wavelength Range (nm):
3000 - 5000
Conjugate Distance:
Infinite

Regulatory Compliance

RoHS:

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.

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