JPS5317728A - Focus detector for cine camera - Google Patents

Focus detector for cine camera

Info

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
Application number
JP9247376A
Other languages
Japanese (ja)
Inventor
Toshihiro Kondo
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP9247376A priority Critical patent/JPS5317728A/en
Priority to US05/754,699 priority patent/US4090209A/en
Priority to DE19762659009 priority patent/DE2659009A1/en
Publication of JPS5317728A publication Critical patent/JPS5317728A/en
Pending legal-status Critical Current

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
JP9247376A 1975-12-26 1976-08-03 Focus detector for cine camera Pending JPS5317728A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077692A (en) * 1983-09-30 1985-05-02 Toshiba Corp Controller of power converter

Cited By (1)

* Cited by examiner, † Cited by third party
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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