EP 0418784 A2 19910327 - Lamp provided with thin film for reflecting infrared rays.
Title (en)
Lamp provided with thin film for reflecting infrared rays.
Title (de)
Lampe mit Dünnschicht für die Reflexion der Infrarot-Strahlen.
Title (fr)
Lampe munie d'une couche mince pour la reflexion des rayonnements infrarouges.
Publication
Application
Priority
JP 24199389 A 19890920
Abstract (en)
A lamp is provided on the surface of its glass bulb with a multi-layer film comprising an alternate laminate of at least one dielectric layer (8) of a higher refractive index and at least one dielectric layer (9) of a lower refractive index, so as to transmit visible rays radiated from a light source (1) and to reflect infrared rays radiated from the light source (1), wherein a low transmittance range with a transmittance of 10 to 40% is provided in a visible region.
IPC 1-7
IPC 8 full level
H01J 61/40 (2006.01); H01K 1/32 (2006.01)
CPC (source: EP)
H01J 61/40 (2013.01); H01K 1/32 (2013.01)
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 0418784 A2 19910327; EP 0418784 A3 19910814; JP H03105849 A 19910502
DOCDB simple family (application)
EP 90117866 A 19900917; JP 24199389 A 19890920