F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V5/00—Refractors for light sources
Landscapes
Engineering & Computer Science
(AREA)
General Engineering & Computer Science
(AREA)
Non-Portable Lighting Devices Or Systems Thereof
(AREA)
Procede de fabrication d'un dispositif pouvant etre utilise notamment comme projecteur pour la photographie ou la television et dispositif fabrique selon ce procede