JPH01309013A - Focal point detector and camera - Google Patents

Focal point detector and camera

Info

Publication number
JPH01309013A
JPH01309013A JP14025788A JP14025788A JPH01309013A JP H01309013 A JPH01309013 A JP H01309013A JP 14025788 A JP14025788 A JP 14025788A JP 14025788 A JP14025788 A JP 14025788A JP H01309013 A JPH01309013 A JP H01309013A
Authority
JP
Japan
Prior art keywords
focal point
detecting
camera
switch
designating
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.)
Granted
Application number
JP14025788A
Other languages
Japanese (ja)
Inventor
Kenji Suzuki
Keiji Otaka
Yasuo Suda
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14025788A priority Critical patent/JPH01309013A/en
Publication of JPH01309013A publication Critical patent/JPH01309013A/en
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prevent deterioration in focal point detecting accuracy, which results from the vignetting of a photographing lens and a change in an exit pupil by providing a designation enable range determining means determining a range that a designating means can designate part of a photoelectric conversion element train.
CONSTITUTION: A circuit for detecting a switch and displaying DDR is selected when a communication selecting signal CDDR is at a high level, and controlled by a camera controller PRS. Based on a data signal SO transmitted from the camera controller PRS, the display of a camera display DSP is switched, and whether various operational switches on the camera are turned on or off is detected. Moreover, a condition designated by an up switch for detecting a focal point and designating a visual field SWUP and a down switch for detecting a focal point and designating a visual field SWDN is detected to inform the camera controller PRS. The up switch SWUP dsignates part of the photoelectric conversion element train corresponding to a focal point detecting field within a focal point detection enabled range according to the type and attribute of the photographing lens and a zoom location. Thus, the deterioration in forcal point detecting accuracy, which results from the vignetting of a photographing lens and change in the exit pupil, is prevented.
COPYRIGHT: (C)1989,JPO&Japio
JP14025788A 1988-06-07 1988-06-07 Focal point detector and camera Granted JPH01309013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14025788A JPH01309013A (en) 1988-06-07 1988-06-07 Focal point detector and camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14025788A JPH01309013A (en) 1988-06-07 1988-06-07 Focal point detector and camera

Publications (1)

Publication Number Publication Date
JPH01309013A true JPH01309013A (en) 1989-12-13

Family

ID=15264578

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14025788A Granted JPH01309013A (en) 1988-06-07 1988-06-07 Focal point detector and camera

Country Status (1)

Country Link
JP (1) JPH01309013A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0488326A (en) * 1990-08-01 1992-03-23 Fuji Electric Co Ltd Object detector of optical instrument
US5206498A (en) * 1991-06-07 1993-04-27 Asahi Kogaku Kogyo Kabushiki Kaisha Focus detecting apparatus having variable power condenser lens
US5227833A (en) * 1990-04-17 1993-07-13 Minolta Camera Kabushiki Kaisha Apparatus having an automatic focus detecting device
US5363169A (en) * 1990-04-17 1994-11-08 Minolta Camera Kabushiki Kaisha Camera operated in one of a plurality of photographing modes
JP2002092605A (en) * 2000-09-18 2002-03-29 Oki Electric Ind Co Ltd Iris recognition device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58219505A (en) * 1982-06-14 1983-12-21 Nippon Seimitsu Kogyo Kk Automatic focusing device capable of varying area for detecting focus
JPS5967505A (en) * 1982-10-12 1984-04-17 Asahi Optical Co Ltd Automatic focusing device of video camera
JPS6317418A (en) * 1986-06-25 1988-01-25 Minolta Camera Co Ltd Focusing detecting device
JPS6366519A (en) * 1986-09-09 1988-03-25 Matsushita Electric Ind Co Ltd Auto-focusing device
JPH01289905A (en) * 1988-05-17 1989-11-21 Minolta Camera Co Ltd Camera and camera body

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58219505A (en) * 1982-06-14 1983-12-21 Nippon Seimitsu Kogyo Kk Automatic focusing device capable of varying area for detecting focus
JPS5967505A (en) * 1982-10-12 1984-04-17 Asahi Optical Co Ltd Automatic focusing device of video camera
JPS6317418A (en) * 1986-06-25 1988-01-25 Minolta Camera Co Ltd Focusing detecting device
JPS6366519A (en) * 1986-09-09 1988-03-25 Matsushita Electric Ind Co Ltd Auto-focusing device
JPH01289905A (en) * 1988-05-17 1989-11-21 Minolta Camera Co Ltd Camera and camera body

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5227833A (en) * 1990-04-17 1993-07-13 Minolta Camera Kabushiki Kaisha Apparatus having an automatic focus detecting device
US5363169A (en) * 1990-04-17 1994-11-08 Minolta Camera Kabushiki Kaisha Camera operated in one of a plurality of photographing modes
JPH0488326A (en) * 1990-08-01 1992-03-23 Fuji Electric Co Ltd Object detector of optical instrument
US5206498A (en) * 1991-06-07 1993-04-27 Asahi Kogaku Kogyo Kabushiki Kaisha Focus detecting apparatus having variable power condenser lens
JP2002092605A (en) * 2000-09-18 2002-03-29 Oki Electric Ind Co Ltd Iris recognition device

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