Specification

Material

Normally K9（BK7）or quartz, other optical material can be made according to customer’s requirement.

Tolerance

Low precision

Standard Precision

High Precision

Glass

n_d

±0.001

±0.0005

±0.0001

v_d

±0.8%

±0.3%

±0.1%

Dimension Tolerance (mm)

±0.20

±0.10

+0.01/-0.01

Angle Tolerance (θⅠ)

10 minutes

3-5 minutes

10 second

Angle Tolerance (θⅡ)

10 minutes

3-5 minutes

10 second

Scratch-Dig（S-D）

80-50

60-40

10-5

Wave-front Distortion @632.8nm

λ per 25mm

λ/4per 25mm

λ/20 per 25mm

Clear Aperture

80%

90%

100%

Bevel

0.2±0.10mmx45° or upon requirement

No bevel

Coating

Customer coating is available.