Biconvex lens Ø 160.0 mm 3.5 diopters made of optical glass, ground and polished but without antireflection coating

Size: Ø 160.0 mm
Optical power: 3.5 diopters
Focal length: 285 mm
Rim thickness: 3.65 ±0.2 mm
centre thickness: 25.30 ±0.2 mm
Protective bevel on both sides: approx. 0,6 –+0, - 0,3 x 45°

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