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All Products / Optics / Optical Lenses / Aspheric Lenses / Infrared / LightPath® Mid-Wave and Long-Wave Infrared (IR) Aspheric Lenses
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LightPath 390037 | 5.5mm Dia., 0.85 NA, BBAR (1800-3000nm), Mounted IR Aspheric Lens

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Stock #66-572 Clearance 3-5 days
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Diameter (mm):
5.50 ±0.10
Effective Focal Length EFL (mm):
1.87 @ 9500nm
Numerical Aperture NA:
0.85
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Black Diamond™ BD-2 (Ge28Sb12Se60)
Aspheric Design Wavelength (nm):
9500
Coating:
BBAR (1800-3000nm)
Coating Specification:
Ravg <1.0% @ 1.8 - 3.0μm
Surface Quality:
80-50
Clear Aperture CA (mm):
4.00
Center Thickness CT (mm):
3.00
f/#:
0.58
Bevel:
Protective bevel as needed
Density (g/cm3):
4.68
Index of Refraction nd @ 10μm:
2.6023
Index of Refraction nd @ 14μm:
2.5843
Index of Refraction nd @ 4μm:
2.6210
Index of Refraction nd @ 5μm:
2.6173
Lightpath Lens Code:
390037
Mount:
Stainless Steel, M9 x 0.5 Thread
Thermo-optic coefficient dn/dT:
70 x 10-6/°C from -40° to +80°C (5 - 14 μm)
Transformation Temperature (°C):
285.00
Type:
Aspheric Lens
Wavelength Range (nm):
1800 - 3000
Working Distance (mm):
0.72
Conjugate Distance:
Infinite

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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Reach 233:
Compliant
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Product Family Description

  • Wavelength Range of 1.8 - 12μm
  • Variety of Coating Options
  • Mounted and Unmounted Versions

LightPath® Mid-Wave and Long-Wave Infrared (IR) Aspheric Lenses feature a low-cost, molded design and offer several key benefits over Germanium substrate aspheres. With a dn/dT and CTE significantly less than that of Germanium, the lenses feature a smaller change in focal length as a function of temperature change. Featuring a higher operating temperature than Germanium (which suffers 20 – 30% transmission loss at 100°C), the lenses can be used in applications including collimators for QCL lasers and as components within thermal imaging assemblies. LightPath Mid-Wave and Long-Wave Infrared (IR) Aspheric Lenses have a wavelength range of 1.8 - 12μm. These lenses are available mounted or unmounted, in a variety of coating options.