Precision Molded Infrared Aspheric Lenses

Product number: SW11896

Manufacturer: GH Optics

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Product information "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

Manufacturer "GH Optics"

Founded by a team of optical experts with more than ten years of experience in the optical industry, GH Optics focuses on the design, development and series production of precision optics. Among the core competences of the manufacturer are the processing of optical glass preforms (VIS and IR) including polishing, grinding and CNC machining, as well as precision molding of aspheric lenses. Using advanced technologies, GH Optics can coat components with a wide portfolio of materials for wavelengths ranging from 350 nm to 14 µm. The supplier also offers optical assembly, ranging from mounted lenses and thermal imaging assemblies to modules and complex optical systems. A full set of qualification and test capabilities guarantees high and consistent product quality of the products. All products supplied by GH Optics are RoHS compliant. GH Optics’ standard catalog products range from precision molded aspheric lenses for the visible (VIS) and infrared (IR) range, mounted aspheric lenses and fiber collimators to thermal imaging lens assemblies and freeform optics. Beyond its catalogue products, GH Optics specifies, develops and manufactures customized optical solutions according to the customer’s specifications and requirements.