Biconvex lens Ø 40.0 mm - pack of 10 made of optical glass, ground and polished in different magnifications from 10 to 20 dioptres

Size: Ø 40.0 mm
Optical power: 10 dioptres
Focal length: 100 mm
Rim thickness: 2.4 mm
Centre thickness: 6.25 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Size: Ø 40.0 mm
Optical power: 16 dioptres
Focal length: 62 mm
rim thickness: 2.35 mm
centre thickness: 8.5 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Size: Ø 40.0 mm
Optical power: 20 dioptres
Focal length: 50 mm
rim thickness: 2.1 mm
centre thickness: 10.1 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Tolerances:
From 40 mm Ø the size tolerances are subject to the deviations from the nominal dimension that the raw glass compacts exhibit.

These are:
for 40 - 75 mm Ø -0.3 mm
for 75 - 120 mm Ø -0.5 mm
over 120 mm Ø -0.8 - 0.9 mm