Double-Concave (DCV) Lenses, D=25.40mm, F=-25.40mm, Uncoated UV Fused Silica, United Optical Technology Co., Ltd (CAT#: STEM-OP-1262-YJL)

Double-Concave (DCV) Lenses, D=25.40mm, F=-25.40mm, Uncoated UV Fused Silica, model 130056, is manufactured by United Optical Technology Co., Ltd.
UV Fused Silica Double Concave (DCV) Lenses are double concave lenses based on fused silica.
UV fused silica glass material has a wider spectral range (185nm-2.1μm) than K9 optical glass and has excellent transmittance in the ultraviolet band. It has lower refractive index, better uniformity and smaller thermal expansion coefficient. It also has higher chemical resistance and very low fluorescence, and can be used to make various optical components.。

Diameter: 25.40mm
EFL: -25.40mm
Coating: Uncoated
Material: UV-Grade Fused Silica
BFL: -26.08mm
Curvature Radius R1: -23.60mm
Center Thickness CT: 2.00mm
Edge Thickness ET: 9.42mm
Available Mount Ring: 500019
Design Wavelength: 587.6nm
Diameter Tolerance: +0.0/-0.1
Center Thickness Tolerance: ±0.2
Surface Accuracy: λ/4@632.8nm
Focal Length Tolerance: ±2%
Centering Tolerance: 3 arcmin
Surface Quality: 20/10-40/20
Bevel: 0.2X45°
n: n=1.45848

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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