LG4060VQ Precision Molded Aspheric Lens

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