Normal

High Precision

Mfg. Limit

Glass Quality:

Nd Tolerance:

+/- 0.001

+/- 0.0005

Vd Tolerance:

0.80%

0.50%

0.20%

Homogeneity:

0.0001

0.00002

0.000001

Striae / Bubbles:

Grade B

Grade A

Bubble unacceptable

Diameter (mm):

+0.00 / -0.10

+0.00 / -0.20

+0.00 / -0.010

Center Thickness (mm):

+/- 0.150

+/-0.030

+/- 0.010

SAG (mm):

+/- 0.050

+/-0.025

+/- 0.010

Radius (mm):

+/- 0.2%

+/-0.1%

+/- 0.025%

Power- Irregularity (fringe):

5-2

2-0.5

1-0.1

Wedge Lens (TIM, mm):

0.05

0.01

+/-0.005

Wedge Prism (TIA, arc min):

3

0.5

0.1

Bevels (Max face width @ 45deg, mm):

1

0.5

0.15-0.25

Scratch – Dig:

80-50

40-20

20-10

AR Coating ( Ave R):

MgF2, R<1.5%

BBAR, R<0.1%

Other per requirement