EP 0464703 A2 19920108 - Filter for a low-pressure mercury vapor lamp.
Title (en)
Filter for a low-pressure mercury vapor lamp.
Title (de)
Filter für eine Niederdruck-Quecksilberdampflampe.
Title (fr)
Filtre pour une lampe à vapeur de mercure sous basse pression.
Publication
Application
Priority
JP 16851190 A 19900628
Abstract (en)
A filter for absorbing radiation of a selected wave length emitted from low-pressure mercury lamp means is disclosed. The filter comprises means for providing an ozone-containing gas layer positioned between the low-pressure mercury lamp menas and an object to be illuminated, which may be formed by providing a transparent space filled with the ozone-containing gas between the lamp means and the object. By this means, a relatively large sized filter which has a simple construction may be obtained.
IPC 1-7
IPC 8 full level
G02B 5/22 (2006.01); F21V 9/00 (2006.01); H01J 61/40 (2006.01)
CPC (source: EP KR US)
H01J 61/00 (2013.01 - KR); H01J 61/40 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0464703 A2 19920108; EP 0464703 A3 19921028; JP H0458202 A 19920225; KR 920001615 A 19920130
DOCDB simple family (application)
EP 91110745 A 19910628; JP 16851190 A 19900628; KR 910010271 A 19910621