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

Germanium Infrared (IR) Aspheric Lenses

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  • Diffraction Limited Performance
  • Variety of Coating Options
  • Full Prescription Data Available
  • Due to material supply chain disruptions with germanium, there may be increased lead times and price changes on our germanium products. For more information, please contact our customer service team.

Common Specifications

Centering (arcmin):
≤5
Bevel:
Protective bevel as needed
Edges:
Diamond Turned
Substrate:
Germanium (Ge)
Asphere Figure Error, RMS @ 632.8nm:
λ/6
Surface Quality:
60-40
Conjugate Distance:
Infinite
Dia. (mm) EFL (mm) NA  Coating   Compare   Stock Number   Price  Buy
12.50 9.50 0.65 Uncoated #22-767 Clearance A$1,352.00   Request Quote  
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12.50 12.50 0.50 Uncoated #22-768 Clearance A$1,200.00   Request Quote  
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12.50 25.00 0.25 Uncoated #22-769 Clearance A$1,200.00 Qty 6+ A$960.00   Request Quote  
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12.50 37.50 0.16 Uncoated #22-770 Clearance A$1,200.00 Qty 6+ A$960.00   Request Quote  
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12.50 9.50 0.65 BBAR (3000-12000nm) #22-775 Clearance A$1,648.00   Request Quote  
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12.50 12.50 0.50 BBAR (3000-12000nm) #22-776 Clearance A$1,504.00   Request Quote  
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12.50 25.00 0.25 BBAR (3000-12000nm) #22-777 Clearance A$1,504.00   Request Quote  
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12.50 37.50 0.16 BBAR (3000-12000nm) #22-778 Clearance A$1,504.00   Request Quote  
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12.50 9.50 0.65 BBAR (8000-12000nm) #22-779 Clearance A$1,648.00   Request Quote  
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12.50 12.50 0.50 BBAR (8000-12000nm) #22-780 Clearance A$1,504.00   Request Quote  
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12.50 25.00 0.25 BBAR (8000-12000nm) #22-781 Clearance A$1,504.00   Request Quote  
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12.50 37.50 0.16 BBAR (8000-12000nm) #22-782 Clearance A$1,504.00 Qty 6+ A$1,200.00   Request Quote  
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25.00 12.50 1.00 Uncoated
Other Coating Options
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#68-235 Clearance A$2,352.00   Request Quote  
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25.00 15.00 0.83 Uncoated
Other Coating Options
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#68-236 Clearance A$2,192.00   Request Quote  
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25.00 20.00 0.63 Uncoated
Other Coating Options
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#68-237 Clearance A$1,992.00   Request Quote  
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25.00 25.00 0.50 Uncoated
Other Coating Options
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#68-238 Clearance A$1,888.00   Request Quote  
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25.00 30.00 0.42 Uncoated
Other Coating Options
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#68-239 Clearance A$1,888.00   Request Quote  
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25.00 40.00 0.31 Uncoated
Other Coating Options
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#68-240 Clearance A$1,888.00   Request Quote  
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25.00 50.00 0.25 Uncoated
Other Coating Options
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#68-241 Clearance A$1,888.00   Request Quote  
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25.00 75.00 0.17 Uncoated
Other Coating Options
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#68-242 Clearance A$1,888.00   Request Quote  
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25.00 12.50 1.00 BBAR (3000-5000nm)
Other Coating Options
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#68-243 Clearance A$2,744.00   Request Quote  
  • 3-5 days
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25.00 15.00 0.83 BBAR (3000-5000nm)
Other Coating Options
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#68-244 Clearance A$2,576.00   Request Quote  
  • 3-5 days
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25.00 20.00 0.63 BBAR (3000-5000nm)
Other Coating Options
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#68-245 Clearance A$2,384.00   Request Quote  
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25.00 25.00 0.50 BBAR (3000-5000nm)
Other Coating Options
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#68-246 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 30.00 0.42 BBAR (3000-5000nm)
Other Coating Options
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#68-247 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 40.00 0.31 BBAR (3000-5000nm)
Other Coating Options
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#68-248 Clearance A$2,280.00   Request Quote  
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25.00 50.00 0.25 BBAR (3000-5000nm)
Other Coating Options
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#68-249 Clearance A$2,280.00   Request Quote  
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25.00 75.00 0.17 BBAR (3000-5000nm)
Other Coating Options
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#68-250 Clearance A$2,280.00   Request Quote  
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25.00 12.50 1.00 BBAR (3000-12000nm)
Other Coating Options
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#89-607 Clearance A$2,744.00   Request Quote  
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25.00 15.00 0.83 BBAR (3000-12000nm)
Other Coating Options
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#89-608 Clearance A$2,584.00   Request Quote  
  • 3-5 days
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25.00 20.00 0.63 BBAR (3000-12000nm)
Other Coating Options
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#89-609 Clearance A$2,384.00   Request Quote  
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25.00 25.00 0.50 BBAR (3000-12000nm)
Other Coating Options
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#89-610 Clearance A$2,280.00   Request Quote  
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25.00 30.00 0.42 BBAR (3000-12000nm)
Other Coating Options
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#89-611 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 40.00 0.31 BBAR (3000-12000nm)
Other Coating Options
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#89-612 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 50.00 0.25 BBAR (3000-12000nm)
Other Coating Options
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#89-613 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 75.00 0.17 BBAR (3000-12000nm)
Other Coating Options
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#89-614 Clearance A$2,280.00   Request Quote  
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25.00 12.50 1.00 BBAR (8000-12000nm)
Other Coating Options
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#68-251 Clearance A$2,752.00   Request Quote  
  • 3-5 days
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25.00 15.00 0.83 BBAR (8000-12000nm)
Other Coating Options
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#68-252 Clearance A$2,576.00   Request Quote  
  • 3-5 days
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25.00 20.00 0.63 BBAR (8000-12000nm)
Other Coating Options
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#68-253 Clearance A$2,384.00   Request Quote  
  • 3-5 days
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25.00 25.00 0.50 BBAR (8000-12000nm)
Other Coating Options
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#68-254 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 30.00 0.42 BBAR (8000-12000nm)
Other Coating Options
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#68-255 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 40.00 0.31 BBAR (8000-12000nm)
Other Coating Options
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#68-256 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 50.00 0.25 BBAR (8000-12000nm)
Other Coating Options
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#68-257 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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25.00 75.00 0.17 BBAR (8000-12000nm)
Other Coating Options
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#68-258 Clearance A$2,280.00   Request Quote  
  • 3-5 days
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50.00 25.00 1.00 Uncoated
Other Coating Options
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#87-993 Clearance A$3,752.00   Request Quote  
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50.00 50.00 0.50 Uncoated
Other Coating Options
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#87-994 Clearance A$3,752.00   Request Quote  
  • 3-5 days
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50.00 25.00 1.00 BBAR (3000-5000nm)
Other Coating Options
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#87-995 Clearance A$4,528.00   Request Quote  
  • 3-5 days
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50.00 50.00 0.50 BBAR (3000-5000nm)
Other Coating Options
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#87-996 Clearance A$4,528.00   Request Quote  
  • 3-5 days
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50.00 25.00 1.00 BBAR (3000-12000nm)
Other Coating Options
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#89-615 Clearance A$4,528.00   Request Quote  
  • 3-5 days
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50.00 50.00 0.50 BBAR (3000-12000nm)
Other Coating Options
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#89-616 Clearance A$4,528.00   Request Quote  
  • 3-5 days
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50.00 25.00 1.00 BBAR (8000-12000nm)
Other Coating Options
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#87-997 Clearance A$4,528.00   Request Quote  
  • 3-5 days
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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. 
The lenses are available in a 12.5, 25, or 50mm diameter. TECHSPEC® Germanium Infrared (IR) Aspheric Lenses are 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

AR COATED GERMANIUM

Typical transmission of a 3mm thick Ge window with BBAR (3000-5000nm) coating at 0° AOI.

The blue shaded region indicates the coating design wavelengh range, with the following specification: 

Ravg <3% @ 3000 - 5000nm

Data outside this range is not guaranteed and is for reference only.

Click Here to Download Data

Typical transmission of a 3mm thick Ge window with BBAR (3000-12000nm) coating at 0° AOI.

The blue shaded region indicates the coating design wavelengh range, with the following specification: 

Ravg <5.0% @ 3 - 12μm

Data outside this range is not guaranteed and is for reference only.

Click Here to Download Data

Typical transmission of a 3mm thick Ge window with BBAR (8000-12000nm) coating at 0° AOI.

The blue shaded region indicates the coating design wavelengh range, with the following specification: 

Ravg <3.0% @ 8 - 12μm

Data outside this range is not guaranteed and is for reference only.

Click Here to Download Data

Filter

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Is it okay to clean an infrared lens, for example one made of germanium, with ethanol?

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Chromatic Focal Shift

Conjugate Distance

Épaisseur de bord

Distance focale effective (EFL)

Finite/Finite Conjugate

Power

Singlet Lens

Strehl Ratio

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Diopter

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Bevel

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