Biconvex lens Ø 25.0 mm - pack of 10 made of optical glass, ground and polished in different magnifications from 10 to 36 dioptres

Size: Ø 25.0 mm
Optical power: 10 dioptres
Focal length: 100 mm
Rim thickness: 2.4 mm
centre thickness: 3.9 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Size: Ø 25.0 mm
Optical power: 16 dioptres
Focal length: 62 mm
rim thickness: 1.8 mm
centre thickness: 4.2 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Size: Ø 25.0 mm
Optical power: 20 dioptres
Focal length: 50 mm
rim thickness: 2.1 mm
centre thickness: 5.0 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Size: Ø 25.0 mm
Optical power: 26 dioptres
Focal length: 38 mm
rim thickness: 1.6 mm
centre thickness: 5.3 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Size: Ø 25.0 mm
Optical power: 36 dioptres
Focal length: 28 mm
rim thickness: 2.5 mm
centre thickness: 8.2 mm
cylindrical edge 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