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> etalon: a device consisting of two reflecting glass plates, employed for measuring small differences in the wavelength of light using the interference it prod
by grkvlt 10y ago
> etalon: a device consisting of two reflecting glass plates, employed for measuring small differences in the wavelength of light using the interference it produces.
Is this used in a DSLR? I know they use phase sensors for autofocus, but had never heard this term before.
- slantyyz 10y agoI think the poster meant etalon as in etalon-or, which is French for gold standard?