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Infrared Asphere 0.85NA, 1.87mm FL, 8.0-12.0μm AR Coated

Stock #66-566
€310,00
Cant. 1-10
€310,00
Cant. 11-49
€279,00
Cant. 50+
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Numerical Aperture NA:
0.85
Diameter (mm):
5.50 ±0.015
Effective Focal Length EFL (mm):
1.87
Clear Aperture CA (mm):
4.00
Coating:
BBAR (8000-12000nm)
Surface Quality:
80-50
Center Thickness CT (mm):
3.00
Working Distance (mm):
0.72
Substrate:
Black Diamond™ BD-2 (Ge28Sb12Se60)
Coating Specification:
Ravg <1.0% @ 8 - 12μm
f/#:
0.58
Type:
Aspheric Lens
Wavelength Range (nm):
8000 - 12,000
Index of Refraction nd @ 4μm:
2.6210
Index of Refraction nd @ 14μm:
2.5843
Index of Refraction nd @ 10μm:
2.6023
Index of Refraction nd @ 5μm:
2.6173
Transformation Temperature (°C):
285.00
Coefficient of Thermal Expansion CTE (10-6/°C):
14.00
Density (g/cm3):
4.68
Thermo-optic coefficient dn/dT:
70 x 10-6/°C from -40° to +80°C (5 - 14 μm)
Asphere Figure Error (μm RMS):
Diffraction Limited Transmitted Wavefront

Product Family Description

  • Wavelength Range of 1 - 14μm
  • Variety of Coating Options
  • Mounted and Unmounted Versions

Our infrared aspheric lenses are ideal for a variety of mid-wave and long-wave infrared applications. The low-cost, molded design offers several key benefits over Germanium substrate aspheres. With a dn/dT and CTE significantly less than that of Germanium, our lenses feature a smaller change in focal length as a function of temperature change. And, with a higher operating temperature than Germanium (which suffers 20 – 30% transmission loss at 100°C), our lenses can be used in applications that were not previously possible with Germanium.

The Mid-Wave and Long-Wave Infrared (IR) Aspheric Lenses are available with a variety of coating options. For custom requirements, including custom coatings, custom designs, or adding diffractive features to the aspheric surface, please contact our Sales Department.

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