Germanium Meniscus Lenses

  • High Index of Refraction
  • Minimal Chromatic Aberration Due to Low Dispersion
  • Perfect for Rugged IR Applications

Our Germanium Meniscus Lenses are perfect for Mid-Infrared applications. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, they should be used at temperatures below 100°C. Germanium’s high density (5.33 g/cm3) should be considered when designing for weight-sensitive systems. The Knoop Hardness of Germanium is 780, making it ideal for IR applications requiring rugged optics.

Custom sizes available for OEM volumes, please contact our Applications Engineering Department to discuss your requirements.

 View Legend
Description Stock No. Price In Stock  
Showing 1-10 of 10 Items | Sort by Spec
12.7mm Dia x 12.7mm FL Germanium Meniscus Lens
NT63-287 $375.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.70
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 12.90
Effective Focal Length EFL @ 10.6μm (mm) 12.70
Effective Focal Length EFL @ 5.0μm (mm) 12.80
Effective Focal Length EFL @ 2.94μm (mm) 12.70
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 22.96
Radius R2 (mm) 15.59
Edge Thickness ET (mm) 2.10
Center Thickness CT (mm) 2.50
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
12.7mm Dia x 25.4mm FL Germanium Meniscus Lens
NT63-288 $375.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.70
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 24.90
Effective Focal Length EFL @ 10.6μm (mm) 25.00
Effective Focal Length EFL @ 5.0μm (mm) 24.70
Effective Focal Length EFL @ 2.94μm (mm) 24.50
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 40.27
Radius R2 (mm) 27.13
Edge Thickness ET (mm) 1.80
Center Thickness CT (mm) 2.00
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
12.7mm Dia x 50.8mm FL Germanium Meniscus Lens
NT63-289 $375.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.70
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 49.80
Effective Focal Length EFL @ 10.6μm (mm) 50.00
Effective Focal Length EFL @ 5.0μm (mm) 49.50
Effective Focal Length EFL @ 2.94μm (mm) 49.00
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 79.43
Radius R2 (mm) 52.84
Edge Thickness ET (mm) 1.90
Center Thickness CT (mm) 2.00
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
25.4mm Dia x 25.4mm FL Germanium Meniscus Lens
NT63-290 $425.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 24.90
Effective Focal Length EFL @ 10.6μm (mm) 25.00
Effective Focal Length EFL @ 5.0μm (mm) 24.70
Effective Focal Length EFL @ 2.94μm (mm) 24.50
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 37.15
Radius R2 (mm) 26.30
Edge Thickness ET (mm) 2.00
Center Thickness CT (mm) 3.00
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
25.4mm Dia x 38.1mm FL Germanium Meniscus Lens
NT63-291 $425.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 38.10
Effective Focal Length EFL @ 10.6μm (mm) 38.00
Effective Focal Length EFL @ 5.0μm (mm) 37.90
Effective Focal Length EFL @ 2.94μm (mm) 37.50
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 53.95
Radius R2 (mm) 38.04
Edge Thickness ET (mm) 2.00
Center Thickness CT (mm) 2.70
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
25.4mm Dia x 50.8mm FL Germanium Meniscus Lens
NT63-292 $359.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 49.80
Effective Focal Length EFL @ 10.6μm (mm) 50.00
Effective Focal Length EFL @ 5.0μm (mm) 49.50
Effective Focal Length EFL @ 2.94μm (mm) 49.00
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 74.47
Radius R2 (mm) 51.45
Edge Thickness ET (mm) 2.50
Center Thickness CT (mm) 3.00
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
25.4mm Dia x 63.5mm FL Germanium Meniscus Lens
NT63-293 $359.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 62.30
Effective Focal Length EFL @ 10.6μm (mm) 63.00
Effective Focal Length EFL @ 5.0μm (mm) 62.00
Effective Focal Length EFL @ 2.94μm (mm) 61.40
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 93.11
Radius R2 (mm) 63.68
Edge Thickness ET (mm) 2.60
Center Thickness CT (mm) 3.00
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
25.4mm Dia x 76.2mm FL Germanium Meniscus Lens
NT63-294 $359.00Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 75.30
Effective Focal Length EFL @ 10.6μm (mm) 75.00
Effective Focal Length EFL @ 5.0μm (mm) 75.00
Effective Focal Length EFL @ 2.94μm (mm) 74.20
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 104.23
Radius R2 (mm) 72.78
Edge Thickness ET (mm) 2.40
Center Thickness CT (mm) 2.80
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
25.4mm Dia x 101mm FL Germanium Meniscus Lens
NT63-295 $359.00Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 99.60
Effective Focal Length EFL @ 10.6μm (mm) 100.00
Effective Focal Length EFL @ 5.0μm (mm) 99.20
Effective Focal Length EFL @ 2.94μm (mm) 98.20
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 161.06
Radius R2 (mm) 106.15
Edge Thickness ET (mm) 2.70
Center Thickness CT (mm) 3.00
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt
25.4mm Dia x 125mm FL Germanium Meniscus Lens
NT63-296 $359.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 25.40
Diameter Tolerance (mm) +0.00/-0.13
Clear Aperture (%) 90
Effective Focal Length EFL @ 12μm (mm) 128.20
Effective Focal Length EFL @ 10.6μm (mm) 127.00
Effective Focal Length EFL @ 5.0μm (mm) 127.60
Effective Focal Length EFL @ 2.94μm (mm) 126.30
Focal Length Tolerance (%) ±2 @ DWL
Radius R1 (mm) 187.07
Radius R2 (mm) 127.35
Edge Thickness ET (mm) 2.70
Center Thickness CT (mm) 2.90
Center Thickness Tolerance (mm) ±0.2
Surface Accuracy (λ) 1/20 @ 0.63µm
Surface Quality 60-40
Substrate Germanium (Optical Grade)
Design Wavelength DWL (µm) 10.6
Coating None
RoHS Exempt