JPS5893040A - Range finder for camera - Google Patents

Range finder for camera

Info

Publication number
JPS5893040A
JPS5893040A JP19071181A JP19071181A JPS5893040A JP S5893040 A JPS5893040 A JP S5893040A JP 19071181 A JP19071181 A JP 19071181A JP 19071181 A JP19071181 A JP 19071181A JP S5893040 A JPS5893040 A JP S5893040A
Authority
JP
Japan
Prior art keywords
spc4
spc1
range
subject
lens
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
JP19071181A
Other languages
Japanese (ja)
Other versions
JPH0547815B2 (en
Inventor
Masahiko Ogawa
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 JP56190711A priority Critical patent/JPH0547815B2/ja
Publication of JPS5893040A publication Critical patent/JPS5893040A/en
Publication of JPH0547815B2 publication Critical patent/JPH0547815B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28Systems for automatic generation of focusing signals
    • G02B7/30Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter

Abstract

PURPOSE:To realize range measurement with high precision from a close distance to a long distance regardless of the photographic composition, by having a scan of a projecting element to form an image of the projecting element on a subject onto plural photodetecting elements and then delivering the range measuring signal. CONSTITUTION:In the case of an automatic focusing camera, the photodetecting elements SPC1-SPC4 are provided at the position conjugate to the surface of a film set at the back of a lens L2 or another lens L2 is shifted. An LED scans the range of the SPC1'-SPC4', and the images projected on a subject OB are all formed on the elements SPC1-SPC4 through the lens L2. Thus the range of the images of SPC1'-SPC4' is identical with a viewfield of range measurement at the position of the subject OB. In such a way, the subject OB is scanned by the light projected from the LED and the scanned image is formed at the elements SPC1-SPC4 via the lens L2. Then the range is measured by processing the signals supplied from the elements SPC1-SPC4.
JP56190711A 1981-11-30 1981-11-30 Expired - Lifetime JPH0547815B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56190711A JPH0547815B2 (en) 1981-11-30 1981-11-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56190711A JPH0547815B2 (en) 1981-11-30 1981-11-30

Publications (2)

Publication Number Publication Date
JPS5893040A true JPS5893040A (en) 1983-06-02
JPH0547815B2 JPH0547815B2 (en) 1993-07-19

Family

ID=16262557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56190711A Expired - Lifetime JPH0547815B2 (en) 1981-11-30 1981-11-30

Country Status (1)

Country Link
JP (1) JPH0547815B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62223734A (en) * 1986-03-26 1987-10-01 Chinon Kk Range finder
US5239335A (en) * 1991-02-04 1993-08-24 Olympus Optical Co., Ltd. Auto focus apparatus having a plurality of light emitting elements
US5249013A (en) * 1990-07-23 1993-09-28 Ricoh Company, Ltd. Distance measuring device of camera
JPH0580648B2 (en) * 1984-06-14 1993-11-09 Canon Kk
US5596386A (en) * 1994-09-16 1997-01-21 Olympus Optical Co., Ltd. Projection and reception type focus detecting apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55146425A (en) * 1979-05-01 1980-11-14 Kyocera Corp Automatic focus control unit
JPS5657012A (en) * 1979-10-16 1981-05-19 Canon Inc Distance detecting optical system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55146425A (en) * 1979-05-01 1980-11-14 Kyocera Corp Automatic focus control unit
JPS5657012A (en) * 1979-10-16 1981-05-19 Canon Inc Distance detecting optical system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580648B2 (en) * 1984-06-14 1993-11-09 Canon Kk
JPS62223734A (en) * 1986-03-26 1987-10-01 Chinon Kk Range finder
US5249013A (en) * 1990-07-23 1993-09-28 Ricoh Company, Ltd. Distance measuring device of camera
US5239335A (en) * 1991-02-04 1993-08-24 Olympus Optical Co., Ltd. Auto focus apparatus having a plurality of light emitting elements
US5596386A (en) * 1994-09-16 1997-01-21 Olympus Optical Co., Ltd. Projection and reception type focus detecting apparatus

Also Published As

Publication number Publication date
JPH0547815B2 (en) 1993-07-19

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