Name: 12.5mm Dia x 25mm FL Uncoated, Ge Aspheric Lens
Brand: TECHSPEC
SKU: 22-769
Price: €400,00

12.5mm Dia x 25mm FL Uncoated, Ge Aspheric Lens

Diameter (mm):

12.50 +0.00/-0.10

Effective Focal Length EFL (mm):

25.00 @ 8000nm

Numerical Aperture NA:

0.25

Back Focal Length BFL (mm):

24.25

Germanium (Ge)

Coating:

Uncoated

Centering (arcmin):

≤5

Surface Quality:

60-40

Clear Aperture CA (mm):

11.25

Edge Thickness ET (mm):

2.74

Center Thickness CT (mm):

3.00 ±0.10

f/#:

2.00

Bevel:

Protective bevel as needed

Edges:

Diamond Turned

Radius R₂ (mm):

Infinite

Shape of Back Surface:

Plano

Wavelength Range (nm):

2000 - 14000

Conjugate Distance:

Infinite

Asphere Figure Error, RMS @ 632.8nm:

λ/6

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

View

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.