On-axis parabolic mirrors offer 1% focal length
A line of on-axis parabolic mirrors is manufactured from fine-annealed Pyrex, with optional Zerodur and ULE. The mirrors offer +0/-1 mm-diameter tolerance, 0/2-mm thickness tolerance, and 1% focal length. Surface accuracy is λ/10 p-v @ 633 nm across the CA for f#1 or slower with 60/40 surface quality. They are production-approved to ISO 9001-2015.
Optical Surfaces
Kenley, U.K.