JPS5744808A - Distance measuring device - Google Patents

Distance measuring device

Info

Publication number
JPS5744808A
JPS5744808A JP12026680A JP12026680A JPS5744808A JP S5744808 A JPS5744808 A JP S5744808A JP 12026680 A JP12026680 A JP 12026680A JP 12026680 A JP12026680 A JP 12026680A JP S5744808 A JPS5744808 A JP S5744808A
Authority
JP
Japan
Prior art keywords
distance
error
deltax
optical axis
costheta
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
JP12026680A
Other languages
Japanese (ja)
Other versions
JPS6239723B2 (en
Inventor
Naoya Kaneda
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.)
Canon Inc
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 JP12026680A priority Critical patent/JPS5744808A/en
Publication of JPS5744808A publication Critical patent/JPS5744808A/en
Publication of JPS6239723B2 publication Critical patent/JPS6239723B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Measurement Of Optical Distance (AREA)
  • Focusing (AREA)
  • Viewfinders (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To make accurate distance measurement possible by correcting a distance data measured along the optical axis of the taking lens in respect of the angle of the line of orientation of the object with respect to the optical axis by the output of a detecting means. CONSTITUTION:In a framing step ater measuring the distance, when the object is moved to the peripery of the frame, an error in distance of DELTAx is caused to occur in the measured distance x. In most photographing cases, the error DELTAx is negligible, since the error is included within the depth of field, however, in close-up photography, the error DELTAx causes misfocusing. In photographing with the angle of inclination theta of an object from the optical axis, the distance of the object is represented by x.costheta. Accordingly, the error DELTAx is corrected by adjusting the taking lens to a focus position by calculating the value of x.costheta on the basis of the values of x and theta.
JP12026680A 1980-08-29 1980-08-29 Distance measuring device Granted JPS5744808A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12026680A JPS5744808A (en) 1980-08-29 1980-08-29 Distance measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12026680A JPS5744808A (en) 1980-08-29 1980-08-29 Distance measuring device

Publications (2)

Publication Number Publication Date
JPS5744808A true JPS5744808A (en) 1982-03-13
JPS6239723B2 JPS6239723B2 (en) 1987-08-25

Family

ID=14781954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12026680A Granted JPS5744808A (en) 1980-08-29 1980-08-29 Distance measuring device

Country Status (1)

Country Link
JP (1) JPS5744808A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63259409A (en) * 1988-02-25 1988-10-26 Toshiba Corp Detector
JPH03127055U (en) * 1990-04-06 1991-12-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63259409A (en) * 1988-02-25 1988-10-26 Toshiba Corp Detector
JPH03127055U (en) * 1990-04-06 1991-12-20

Also Published As

Publication number Publication date
JPS6239723B2 (en) 1987-08-25

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