Material

Sodium Chloride (NaCl)

Spherical Configuration

Plano-convex, Plano-concave, Convex-concave,
bi-convex, bi-concave, cylindrical lenses

Diameter Tolerance

+/- 0.1 mm

Thickness Tolerance

+/- 0.1 mm

Centration

5 arc min

Focal length tolerance

+/- 2%

Scratch - Dig

60-40 or upon customer's request down to 10-5

Clear aperture

80 - 90%