EP 0005080 B1 19820224 - SPOTLIGHT LANTERN PROJECTION SYSTEM
Title (en)
SPOTLIGHT LANTERN PROJECTION SYSTEM
Publication
Application
Priority
GB 1649578 A 19780426
Abstract (en)
[origin: EP0005080A1] A light projection system for a spotlight lantern, comprising a grid filament lamp and a rear reflector, wherein the grid filament (11) is located to extend axially along the optical axis of the reflector (12). The rear reflector (12) and/or a frontal reflector (13) used in conjunction therewith is preferably regularly or irregularly facetted in such a manner that each facet produces a patch of light just filling the aperture of a gate, shaping pattern or iris (15). The system shows remarkably improved efficiency compared to known systems having a grid filament disposed transverse to the optical axis.
IPC 1-7
IPC 8 full level
F21V 7/04 (2006.01); F21V 7/09 (2006.01); F21V 11/10 (2006.01); F21V 14/00 (2006.01); H01K 7/02 (2006.01)
CPC (source: EP)
F21V 7/0025 (2013.01); F21V 7/04 (2013.01); F21V 7/09 (2013.01); H01K 7/02 (2013.01); F21V 11/10 (2013.01); F21V 11/18 (2013.01); F21W 2131/406 (2013.01)
Designated contracting state (EPC)
BE CH DE FR IT LU NL SE
DOCDB simple family (publication)
EP 0005080 A1 19791031; EP 0005080 B1 19820224; DE 2962174 D1 19820325; GB 2019999 A 19791107; GB 2019999 B 19820324
DOCDB simple family (application)
EP 79300700 A 19790425; DE 2962174 T 19790425; GB 7902057 A 19790119