Parameter

Range of values

Notes

Dimensions

Diameter, mm

1, 1.8, 3, 4

Length of lens

from 1 to 10 mm

Determined by variation of power constant and lens period

Length tolerance being held

±0.01mm

Deviation from rated value

Angle of ends tilt (operation faces) to grin axis

from 0 to 6 degrees

Operation faces may be both parallel and non-parallel

Non-parallelism of operation faces

< 2.5 angular minutes

Tolerance for angular dimensions being held

± 15 angular minutes

Cleanness of surface

Spots

Comply with cleanness class I under GOST 11141-84

Scratches

Cleavages

Precision of operation surface

Total error, N per 630 nm

0.1

Local error, N per 630 nm

- // -

Antireflection coating

(see reference to coating)