Precision Molded Infrared Aspheric Lenses
Focal Length 0.91-5.95 mm; Numerical Aperture 0.56-0.86; Design Wavelength 4-9,5 µm; Outer Lens Diameter 3.000-8.000 mm; Working Distance 0.66-5.00 mm
GH Optics’ series of infrared lenses are aspheric optics, precision molded in IR glass, designed for use in the short-wave, mid-wave, and long-wave infrared (SWIR, MWIR, LWIR) bands. Typical applications are collimating or focusing (laser) beams, but also coupling quantum cascade lasers (QCL).
With their large numerical apertures, these precision molded infrared aspheric lenses provide optimum collection of light for infrared lasers (short wave (SWIR), mid wave (MWIR) and long wave (LWIR) types), as well as quantum cascade lasers (QCL).
Two types of chalcogenide glass are available:
GH6, made from As40Se60 material, is most popular and widely used. This material is comparable to infrared glass of other leading brands in the market, features high transmission, is Ge free and RoHS compliant and can be molded, grinded and polished.
GH2, made from Ge28Sb12Se60 material, is especially suitable for collimating lenses, gas testing and coupling of quantum cascade lasers (QCL). This material also is comparable to infrared glass of other leading brands in the market, featuring high transmission and RoHS compliance. Lenses made from this material can be molded, grinded and polished and are suitable for high-temperature applications.
Lens Series
Glass Type
Glass Material
Refractive Index @10 µm
Abbe Number @10 µm
CTE
dn/dT
RoHS Compliance
L2
GH2
Ge28Sb12Se60
26.044
93.63
142×10-7/°C
70.4×10-6/°C
yes
L6
GH6
As40Se60
27.775
137.71
209×10-7/°C
31.3×10-6/°C
yes
Our series of molded infrared aspheric lenses can be coated with a range of AR (anti reflection) coatings, including two standard AR coatings (RA, RB) featuring average reflectance values of <1.0% or even <0.5% for wavelength ranges of 3 µm to 5 µm or 8 µm to 12 µm respectively. Other customized coatings like HD (High Density) or SWB (Short Wave Blocking) are available on request.
Lens Code
Outer Diameter (OD)
Effective Focal Length (EFL)
Numerical Aperture (NA)
Clear Aperture (CA)
Working Distance (WD)
Design Wavelength (DW)
L20990
3.000 mm
0.91 mm
0.86
2.50 mm
0.66 mm
4.2 µm
L21990
5.500 mm
1.87 mm
0.85
4.00 mm
0.72 mm
9.5 µm
L23070
6.500 mm
3.00 mm
0.71
5.00 mm
2.35 mm
8 µm
L24060
6.500 mm
4.00 mm
0.56
5.00 mm
3.05 mm
4.0 µm
L26060
8.000 mm
5.95 mm
0.56
7.60 mm
5.00 mm
4 µm
Key Features:
GH6 or GH2 Chalcogenide Glass
Diffraction Limited
Precision Molding
Effective Focal Length: 0.91 mm to 5.95 mm
Numerical Aperture: 0.56 to 0.86
Design Wavelength: 4 µm to 9,5 µm
Outer Lens Diameter: 3.000 mm to 8.000 mm
Working Distance: 0.66 mm to 5.00 mm
Applications: Collimating Lenses; Focusing; Gas Testing; Coupling of Quantum Cascade Lasers (QCL); High-Temperature Applications; And Many More
Product number:
SW11896
Manufacturer: