Bi-concave lens element BK7UV
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Characteristics
- Geometry/curvature
- bi-concave
- Material
- BK7
- Optical characteristics
- UV
Description
Thorlabs' Bi-Concave lenses, including BK7, SF11, UV-fused silica, and CaF2, are popular for many applications. Bi-Concave lenses have a negative focal length and are best used to diverge a converging beam. A bi-concave lens can diverge a collimated beam to a virtual focus and are commonly used in a Galilean-type beam expanders.
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