Specifications

Material

BK7 and Fused silica typically, Visible optical glass, Infrared optical glass.

Tolerances

 Low precision

Standard Precision

High precision

Glass Quality

n_d

±0.001

±0.0005

Melt controlled

v_d

±0.8%

±0.3%

Melt controlled

Dimension Tolerance (mm)

±0.20

±0.10

+0.01/-0.01

Angle Tolerance (θⅠ)

10 minutes

3-5 minutes

5 second

Angle Tolerance (θⅡ)

10 minutes

3-5 minutes

10 second

Scratch-Dig

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

Coating may be available by custom order