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A plano-concave lens is a lens that has a flat surface on one side and a concave surface on the other. A plano-concave lens has a negative focal length, which allows the beam to diverge. Therefore, they are used in optical systems to expand beams, project light, and extend the focal length of an optical system.
Specification | |
Design Wavelength | 632.8nm |
Material | H-K9L(Schott BK7) |
Focal Length Tolerance | ±1% |
Diameter Tolerance | +0.0/-0.1mm |
Thickness Tolerance | ±0.1mm |
Surface Accuracy | λ/4@632.8nm |
Surface Quality | 60/40 |
Centration | ＜3arc min |
Clear Aperture | ＞90% |
Bevelling | ＜0.2×45° |
Coating | A：BBAR Ravg ＜1% From 400nm-700nm； B：BBAR Ravg ＜1% From 700nm-1100nm。 |
