| 摘要 |
1,044,936. Film projection apparatus. CARLZEISS-STIFTUNG [trading as CARL ZEISS]. June 24, 1965 [June 27, 1964], No. 26737/65. Headings G2E and G2J. A projector for the demonstration of slow motion changes in form and brightness as in a planetarium, comprises an endless film-strip 8 continuously driven by roller 9 at a low image frequency, a rotating compensating prism 4, and a rectangular vignetting diaphragm 6 in front of lens 5 in place of the normal image gate. Frequencies of one frame per second or slower are used. |
