FR1001503A - Perfectionnements apportés aux appareils optiques à plage d'observation éclairée, notamment aux appareils de projection de ce genre
- Google Patents
Perfectionnements apportés aux appareils optiques à plage d'observation éclairée, notamment aux appareils de projection de ce genre
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.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SAfiledCriticalSagem SA
Application grantedgrantedCritical
Publication of FR1001503ApublicationCriticalpatent/FR1001503A/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
G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR1001503D1946-05-221946-05-22Perfectionnements apportés aux appareils optiques à plage d'observation éclairée, notamment aux appareils de projection de ce genre
ExpiredFR1001503A
(fr)