Zinc Selenide(ZnSe) Lenses are well-suited for thermal imaging, FLIR systems, and high power 10.6um CO2 laser systems.
ZnSe offers a wider transmission band range (covering 0.6-22 µm) compared to silicon and germanium and its low absorption in the red portion of the visible spectrum.
Zinc Selenide (ZnSe) Plano convex and Zinc Selenide (ZnSe) Meniscus lenses is available in CRYSMIT
ZnSe is a relatively soft material with a Knoop Hardness of 120, making it susceptible to scratches,So It is not recommended for use in harsh environments. When handling ZnSe, it is important to apply uniform pressure and wear Latex finger cots or gloves to prevent contamination and maintain its optical integrity.
Growing Method | Chemical Vapor Deposition(CVD) |
Melting Point | 1525℃ |
Transmission Band | 0.6-20um |
Bulk Absorption Coefficient | 5X10-4cm-1@10.6um |
Density | 5.268g/cm3 |
Refractive Index | 2.4015 at 10.6um |
Young’s Modulus | 67.2 GPa |
Thermal Conductivity | 0.18W/cm/℃ |
Specific Heat | 0.356J/g/℃ |
Thermal Expansion | 7.57x10-6/℃ at 20℃ |
Diameter | +0/-0.10mm |
Length | +/-0.2mm |
Chamfer | 0.20+/-0.10mm @ 45° |
Flatness(@10.6um) | λ/10 @ 10.6μm |
Parallelism | < 40 arc Seconds |
Perpendicularity | < 5 arc min |
Surface Quality | 40/20 |
Zinc Selenide (ZnSe) is a infrared material with chemically vapor deposited grown, commonly used in thermal imaging, FLIR systems, and high power 10.6um CO2 laser systems. ZnSe has the advantages of wider transmission band range (covering 0.6-22 µm), its low absorption in the red portion of the visible spectrum, Low dispersion and Not hygroscopic, etc.
ZnSe is a relatively soft material with a Knoop Hardness of 120, making it susceptible to scratches,So It is not recommended for use in harsh environments. When handling ZnSe, it is important to apply uniform pressure and wear Latex finger cots or gloves to prevent contamination and maintain its optical integrity.
What is the application of Zinc Selenide (ZnSe) lens?
Zinc Selenide (ZnSe) lenses are used in applications that require the manipulation and transmission of infrared (IR) radiation. They find extensive use in thermal imaging, FLIR systems, laser systems (particularly CO2 lasers), medical imaging, industrial processes, and scientific research. ZnSe lenses enable accurate detection, focusing, and visualization of IR radiation, making them essential components in various IR-based technologies.
What are the commonly used types of ZnSe lenses?
Because of their lens shape, plano-convex lenses are easy to produce. The combination of a flat surface and a curved surface generates the necessary refractive power of a lens.
Meniscus lenses are used in the shorter the focal length or the larger the beam diameter laser cutting laser. Meniscus lenses have a convex/concave surface by which the relevant aberration.Meniscus lenses are good for reducing spherical aberration due to their convex/concave surfaces.
Biconvex/biconcave lenses have two equally curved surfaces and are used in rare cases at short focal lengths.
Cylindrical lenses have a planar and a curved surface in which the radius continues along an axis, which results in a focal line instead of a focal point.