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Publication of FR433190ApublicationCriticalpatent/FR433190A/fr
F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V7/00—Reflectors for light sources
F21V7/04—Optical design
F21V7/09—Optical design with a combination of different curvatures
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Engineering & Computer Science
(AREA)
General Engineering & Computer Science
(AREA)
FR433190D1910-09-211911-08-11Procédé et appareil pour l'éclairement des objets
ExpiredFR433190A
(fr)