Standards

Dimensional Tolerances

Diameter

Thickness

+0.000”-0.005”

+/-0.010”

Parallelism

Plano

Radiused, Diameter < 1”

Radiused, Diameter > 1”

<= 3 arc minutes

<= 10 arc minutes

<= 5 arc minutes

Clear Aperture (polished)

90% of diameter

Surface Figure (power/irregularity) at 0.63µm

Plano and

Radiused, r > 1 m

Power: 2 fringes

Irregularity: 1 fringe

Scratch-Dig

10-5