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Products / Optics / Optical Lenses / Aspheric Lenses / Infrared / Germanium Infrared (IR) Aspheric Lenses
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
25mm Dia x 25mm FL Uncoated, Ge Aspheric Lens

Stock #68-238
€515.00
Qty 1-5
€515.00
Qty 6
€412.00
Volume Pricing
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Diameter (mm):
25.00 +0.0/-0.1
Effective Focal Length EFL (mm):
25.00
Numerical Aperture NA:
0.50
Back Focal Length BFL (mm):
22.51
Focal Length Specification Wavelength (μm):
4.00
Center Thickness CT (mm):
3.45
Center Thickness Tolerance (mm):
±0.10
Coating:
Uncoated
Substrate:
Germanium (Ge)
Clear Aperture (%):
90.00
Asphere Figure Error (μm RMS):
0.1
Surface Quality:
60-40
Centering (arcmin):
≤5
f/#:
1.00
Edges:
Diamond Turned
Type:
Aspheric Lens
Wavelength Range (nm):
2000 - 14000
Type of Optics:
Meniscus Lens
Wavelength Range (μm):
2 - 14

Regulatory Compliance

RoHS:
Compliant
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Product Family Description

  • Diffraction Limited Performance
  • Variety of Coating Options
  • Full Prescription Data Available

Our TECHSPEC® Germanium Infrared (IR) Aspheric Lenses provide diffraction limited focusing performance over a broad spectral range in the Mid- and Long Wave infrared regions. Ideal for monochromatic light sources, such as quantum cascade lasers, these lenses offer a high performance alternative to standard plano-convex lenses.

Each aspheric lens is available uncoated, or with BBAR coating options. Uncoated germanium has transmission of <50%, so custom anti-reflection (AR) coatings should be considered if specifying an uncoated lens. Each BBAR coated lens offers >95% transmission, making it ideal for integration into a variety of OEM applications. For custom design or coating options, please contact our Sales Department.

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Edmund Optics GmbH Germany acts as an agent for Edmund Optics Ltd. UK.
The contract partner is Edmund Optics Ltd. UK. Products are shipped from the UK.

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