Definitions from Wiktionary (optical flat)
▸ noun: (optics) A disk of high-quality quartz glass having at least one side ground and polished with a deviation in flatness less than 50 nanometers all over, and a surface quality of 5 microfinish or less; used, in an interferometer, to measure the flatness of other surfaces.
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▸ noun: (optics) A disk of high-quality quartz glass having at least one side ground and polished with a deviation in flatness less than 50 nanometers all over, and a surface quality of 5 microfinish or less; used, in an interferometer, to measure the flatness of other surfaces.
Similar:
flat,
flatfield,
best form lens,
side,
plane mirror,
table,
aplanat,
focal plane,
flattening,
convex lens,
more...
▸ Words similar to optical flat
▸ Usage examples for optical flat
▸ Idioms related to optical flat
▸ Wikipedia articles (New!)
▸ Words that often appear near optical flat
▸ Rhymes of optical flat
▸ Invented words related to optical flat