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G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
G02C7/00—Optical parts
G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
G02C7/104—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having spectral characteristics for purposes other than sun-protection
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FR808777D1935-11-041935-11-04écrans colorés pour projections stéréoscopiques et leur mode d'obtention
ExpiredFR808777A
(fr)