Name: 50mm Dia x 25mm FL 3-12μm Coated, Ge Aspheric Lens
Brand: TECHSPEC
SKU: 89-615
Price: A$2,248.00

50mm Dia x 25mm FL 3-12μm Coated, Ge Aspheric Lens

Diameter (mm):

50.00 +0.0/-0.1

Effective Focal Length EFL (mm):

25.00 @ 4000nm

Numerical Aperture NA:

1.00

Back Focal Length BFL (mm):

20.64

Center Thickness CT (mm):

7.75 ±0.10

Coating:

BBAR (3000-12000nm)

Coating Specification:

R_avg <5.0% @ 3 - 12μm

Germanium (Ge)

Clear Aperture CA (mm):

Surface Quality:

60-40

Edge Thickness ET (mm):

2.5

Centering (arcmin):

≤5

Bevel:

Protective bevel as needed

f/#:

0.5

Edges:

Diamond Turned

Radius R₂ (mm):

49.34

Shape of Back Surface:

Concave

Wavelength Range (nm):

3000 - 12000

Conjugate Distance:

Infinite

Focal Length Specification Wavelength (nm):

4000

Asphere Figure Error, RMS @ 632.8nm:

λ/6

Regulatory Compliance

RoHS 2015:

Compliant

Reach 223:

Compliant

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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