Biconvex lens Ø 75.0 mm made of optical glass, ground and polished in 2 different magnifications; 6.0 and 10.0 dioptres

Size: Ø 75.0 mm
Optical power: 6 dioptres
Focal length: 167 mm
Rim thickness:
Centre thickness: 11.0 mm
Machine bevel with narrow cylindrical rim

Size: Ø 75.0 mm
Optical power: 10 diopters
Focal length: 100 mm
Rim thickness: 2.6 mm
Centre thickness: 16.5 mm
Machine bevel with narrow cylindrical rim

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