Ceravolo Ross Null Lens for Mirror Testing

Ross Null lens specifications:

Diameter: 80 mm
R1: 206mm convex
R2: flat
Thickness: 15 mm
Substrate: BK7

Surface quality 1/10th wave or better on both sides. A Zygo interferometer printout is supplied with each serialized Ross Null lens.

Price: $575.00 USD + S/H

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All payments to be made in USD.