Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DITMAR GEB BRUENNER AG
Original Assignee
DITMAR GEB BRUENNER AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DITMAR GEB BRUENNER AGfiledCriticalDITMAR GEB BRUENNER AG
Application grantedgrantedCritical
Publication of FR822779ApublicationCriticalpatent/FR822779A/fr
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
G03B21/00—Projectors or projection-type viewers; Accessories therefor
G03B21/14—Details
G03B21/20—Lamp housings
G03B21/208—Homogenising, shaping of the illumination light
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR822779D1936-06-081937-06-08Dispositif optique d'éclairage pour appareils de projection
ExpiredFR822779A
(fr)