Double-Concave (DCV) Lenses, D=25.40mm, F=-75.00mm, Uncoated CVD Laser Grade ZnSe(ZnSe), United Optical Technology Co., Ltd (CAT#: STEM-OP-1286-YJL)

Double-Concave (DCV) Lenses, D=25.40mm, F=-75.00mm, Uncoated CVD Laser Grade ZnSe(ZnSe), model 130080, is manufactured by United Optical Technology Co., Ltd.
Zinc Selenide (ZnSe) Double Concave (DCV) Lenses are double concave lenses based on zinc selenide.
Zinc selenide is a commonly used optical glass material in the infrared band. The transmission band is 600nm-16μm. It has the characteristics of low absorption and thermal shock resistance. It is often used in thermal imaging systems, and can also be used in some visible light optical systems, and can be used as the substrate for a variety of optical elements.

Diameter: 25.40mm
EFL: -75.00mm
Coating: Uncoated
Material: CVD Laser grade(ZnSe)
BFL: -75.40mm
Curvature Radius R1: -211.00mm
Center Thickness CT: 2.00mm
Edge Thickness ET: 2.80mm
Available Mount Ring: 500019
Design Wavelength: 10.6um
Diameter Tolerance: +0.0/-0.1
Center Thickness Tolerance: ±0.2
Surface Accuracy: --
Focal Length Tolerance: ±1%
Centering Tolerance: ＜3 arcmin
Surface Quality: 40/20-60/40
Bevel: 0.2X45°
n: --

Biconcave lenses will diverge light and have a negative focal length. They are composed of two concave surfaces with equal curvature. They are often used for beam expansion, projection and expansion of the focal length of optical systems. Special attention should be paid to the fact that zinc selenide is a toxic material. Please be sure to wear gloves when using it and wash your hands after use.

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