SY-808PT Quartz glass plano convex lens, Optical lens, Flat convex lens, dia:20.0mm, f:60.0mm

Description

Quartz glass plano-convex lens  Materials: UV quartz glass  Diameter: 20.0mm Deviation of Diameter: +0.0 / -0.20  Aperture:> 90%   Focal Length (f '): 60.0mm Deviation of Focal length(Df): ± 2.0%  Back focal length(fb): 56.6 Thickness of center(Tc): 5.0  Deviation of  thickness of center(DTc): ± 0.1 Thickness of edge (Te): 3.1 Deviation of center: 3 ' Diaphragm: 1~5  Local diaphragm: 0.2~0.5  Clearing: IV stand Coating: no coating (coated lens can be provided if needed)  Weight: 4.0