Edmund Optics Inc. 1/20λ Optical Flat, Zerodur, 6" Diameter NT48-119-000

Sizes Ranging from 1/2" Diameter to 8" Diameter Certified with a Zygo Interferometer Each 1/20λ Flat Includes a Certificate of Calibration Available with Standard Metallic Mirror Coatings: 1/4λ Mirrors, 1/10λ Mirrors, 1/20λ Mirrors Optical Flats are used as a reference (test plate) against which the flatness of an unknown surface may be compared. Each piece is precision polished by our master opticians and tested on a Zygo interferometer to insure the surface accuracy. The secondary surfaces of our single surface flats are pitch polished to window quality for viewing the interference pattern. Each flat ships in a durable storage case for permanent protection. 1/20λ flats also include a certificate of calibration.