JPS5317728A - Focus detector for cine camera - Google Patents
Focus detector for cine cameraInfo
- Publication number
- JPS5317728A JPS5317728A JP9247376A JP9247376A JPS5317728A JP S5317728 A JPS5317728 A JP S5317728A JP 9247376 A JP9247376 A JP 9247376A JP 9247376 A JP9247376 A JP 9247376A JP S5317728 A JPS5317728 A JP S5317728A
- Authority
- JP
- Japan
- Prior art keywords
- focus detector
- focus
- cine camera
- optical element
- refractive optical
- Prior art date
- 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.)
- Pending
Links
Abstract
PURPOSE: To enable a precise detection of focus even in a dark object to be photographed by moving a refractive optical element arranged near the focus of an objective lens with a motor for driving a shutter in order to detect the minimum value of an A.C. component from an output of a photo-electric element arranged behind the refractive optical element.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9247376A JPS5317728A (en) | 1976-08-03 | 1976-08-03 | Focus detector for cine camera |
US05/754,699 US4090209A (en) | 1975-12-26 | 1976-12-27 | Automatic image focusing system for cameras |
DE19762659009 DE2659009A1 (en) | 1975-12-26 | 1976-12-27 | Automatic focussing camera coping with weak light - uses secondary image periodically shifted to generate AC detection signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9247376A JPS5317728A (en) | 1976-08-03 | 1976-08-03 | Focus detector for cine camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5317728A true JPS5317728A (en) | 1978-02-18 |
Family
ID=14055279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9247376A Pending JPS5317728A (en) | 1975-12-26 | 1976-08-03 | Focus detector for cine camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5317728A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6077692A (en) * | 1983-09-30 | 1985-05-02 | Toshiba Corp | Controller of power converter |
-
1976
- 1976-08-03 JP JP9247376A patent/JPS5317728A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6077692A (en) * | 1983-09-30 | 1985-05-02 | Toshiba Corp | Controller of power converter |
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