Biconvex lens 100x50 mm 4.0 dioptres made of optical glass, ground and polished - rectangular shape

Size: 100x50 mm
Optical power: 4 diopters
Focal length: 250 mm
Rim thickness: 4.5 mm small protective phase
Centre thickness: 14.1 mm

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