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.)
ILE POUR L ETUDE de la PHOTOGR
Original Assignee
ILE POUR L ETUDE de la PHOTOGR
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Filing date
Publication date
Application filed by ILE POUR L ETUDE de la PHOTOGRfiledCriticalILE POUR L ETUDE de la PHOTOGR
Application grantedgrantedCritical
Publication of FR664575ApublicationCriticalpatent/FR664575A/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)
FR664575D1928-03-051928-03-05Dispositif d'éclairage pour films gaufrés
ExpiredFR664575A
(fr)