Double-Concave (DCV) Lenses, D=25.40mm, F=-30.00mm, Uncoated CaF2 Single Crystal, United Optical Technology Co., Ltd (CAT#: STEM-OP-1278-YJL)

Double-Concave (DCV) Lenses, D=25.40mm, F=-30.00mm, Uncoated CaF2 Single Crystal, model 130072, is manufactured by United Optical Technology Co., Ltd.
Calcium Fluoride (CaF2) Double Concave (DCV) Lenses are double concave lenses based on calcium fluoride.
Calcium fluoride material has a wide transmission spectrum range (180nm-8.0μm). It has the characteristics of high damage threshold, low fluorescence and high uniformity. The physical properties are soft and the surface is easily scratched. It is often used in the collimation of lasers and is often used as the substrate for various optical components, such as lenses, windows, etc.

Diameter: 25.40mm
EFL: -30.00mm
Coating: Uncoated
Material: CaF2 single-crystal
BFL: -30.90mm
Curvature Radius R1: -26.40mm
Center Thickness CT: 2.50mm
Edge Thickness ET: 9.00mm
Available Mount Ring: 500019
Design Wavelength: 587.6nm
Diameter Tolerance: +0.0/-0.1
Center Thickness Tolerance: ±0.1
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.

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