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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

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Stock #68-238 Other Coating Options
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- +
€630,00
Qty 1-5
€630,00
Qty 6+
€504,00
Volume Pricing
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Diameter (mm):
25.00 +0.0/-0.1
Effective Focal Length EFL (mm):
25.00 @ 4000nm
Numerical Aperture NA:
0.50
Back Focal Length BFL (mm):
22.51
Center Thickness CT (mm):
3.45 ±0.10
Coating:
Uncoated
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Germanium (Ge)
Clear Aperture CA (mm):
22.5
Surface Quality:
60-40
Edge Thickness ET (mm):
2.32
Centering (arcmin):
≤5
Bevel:
Protective bevel as needed
f/#:
1.00
Edges:
Diamond Turned
Radius R2 (mm):
37.8
Shape of Back Surface:
Concave
Wavelength Range (nm):
2000 - 14000
Conjugate Distance:
Infinite
Focal Length Specification Wavelength (nm):
4000
Asphere Figure Error, RMS @ 632.8nm:
λ/6

Regulatory Compliance

RoHS:
Certificate of Conformance:

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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