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TECHSPEC^® components are designed, specified, or manufactured by Edmund Optics. Learn More

25mm Dia x 12.5mm FL 3-5μm Coated, Ge Aspheric Lens

Name: 25mm Dia x 12.5mm FL 3-5μm Coated, Ge Aspheric Lens
Brand: TECHSPEC
SKU: 68-243
Price: €855,00

Stock #68-243 Other Coating Options

- +

€855,00

Qty 1-5
€855,00

Qty 6+
€671,00

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Specifications

Diameter (mm):

25.00 +0.0/-0.1

Effective Focal Length EFL (mm):

12.50 @ 4000nm

Numerical Aperture NA:

1.00

Back Focal Length BFL (mm):

11.61

Center Thickness CT (mm):

4.24 ±0.10

Coating:

BBAR (3000-5000nm)

Coating Specification:

R_avg <3.0% @ 3 - 5μm

Germanium (Ge)

Clear Aperture CA (mm):

22.5

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):

435.187

Shape of Back Surface:

Convex

Wavelength Range (nm):

3000 - 5000

Conjugate Distance:

Infinite

Focal Length Specification Wavelength (nm):

4000

Asphere Figure Error, RMS @ 632.8nm:

λ/6

Regulatory Compliance

RoHS 2015:

Compliant

Reach 224:

Compliant

Learn More

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.

Technical Information

Compatible Mounts

Title	Type	Stock Number	Price	Buy
25.0/25.4mm Optic Dia., SM1 Thin Mount, M4	Fixed	#13-787	€17,50 Qty 5+ €16,60 Request Quote	3-4 days ×
25.0/25.4mm Optic Dia., SM1 Thin Mount, 8-32	Fixed	#13-788	€17,50 Qty 5+ €16,60 Request Quote	3-4 days ×
25mm Thin Inner Single Optic Mount	Fixed	#38-755	€29,50 Qty 5+ €28,30 Request Quote	3-4 days ×
25.0mm Optic Dia., Optic Mount	Fixed	#64-560	€42,50 Qty 10+ €38,20 Request Quote	In Stock ×
25/25.4mm Diameter, T-Mount Thin Optic Mount	Fixed	#52-292	€58,00 Qty 5+ €51,50 Request Quote	In Stock ×
25mm Thin Inner Pair Optic Mounts	Fixed	#11-052	€59,00 Qty 5+ €55,10 Request Quote	3-4 days ×
25mm Thick Inner Pair Optic Mounts	Fixed	#11-054	€59,00 Qty 5+ €55,10 Request Quote	3-4 days ×
25.0/25.4mm Optic Dia., L-Slot Direct Mount	Fixed	#36-410	€59,50 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., Side Flange Direct Mount	Fixed	#36-414	€59,50 Request Quote	3-4 days ×
25.0/25.4mm Optic Dia., L-Slot and Rotation Direct Mount	Adjustable - Rotary	#36-411	€86,00 Request Quote	3-4 days ×
25/25.4mm Diameter, C-Mount Thin Optic Mount	Fixed	#56-353	€86,50 Qty 5+ €76,60 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., X-Y Translating Optic Mount	Adjustable - Linear (XY)	#62-956	€245,00 Qty 5+ €233,00 Request Quote	3-4 days ×
25.0/25.4mm Optic Dia., X-Y-Z Translating Optic Mount	Adjustable - Linear (XYZ)	#62-959	€481,00 Qty 5+ €433,00 Request Quote	3-4 days ×
25.0/25.4mm Optic Dia., 5 Axes Optical Mount	Adjustable - Linear (XYZ) & Tip-Tilt	#13-776	€670,00 Qty 5+ €637,00 Request Quote	3-4 days ×

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