JPS5724905A - Focusing detector - Google Patents

Focusing detector

Info

Publication number
JPS5724905A
JPS5724905A JP9961880A JP9961880A JPS5724905A JP S5724905 A JPS5724905 A JP S5724905A JP 9961880 A JP9961880 A JP 9961880A JP 9961880 A JP9961880 A JP 9961880A JP S5724905 A JPS5724905 A JP S5724905A
Authority
JP
Japan
Prior art keywords
gravity
optical
center
brightness
psd
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
JP9961880A
Other languages
Japanese (ja)
Inventor
Haruhiko Momose
Toshiaki Takahashi
Yasushi Hoshino
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP9961880A priority Critical patent/JPS5724905A/en
Priority to US06/281,890 priority patent/US4441810A/en
Priority to DE19813127786 priority patent/DE3127786A1/en
Publication of JPS5724905A publication Critical patent/JPS5724905A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/10—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with variable angles and a base of fixed length in the observation station, e.g. in the instrument
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/46—Indirect determination of position data

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To obtain certainly a center of gravity of brightness of spot light by shifting an optical detecting surface to a position eccentric to an optical axis, by arranging an image position detector PSD at an equivalent position of an image forming plane and by judging focusing using the extreme value of the output. CONSTITUTION:The upper side of an optical axis of a PSD placed at a position equivalent to a film F has light blocked with a mask 4 and an optical detecting surface is eccentric to the optical axis. For the situation, as an optical image on the PSD is enlarged with fading, a center of gravity of brightness moves, and a difference between output power sources I1, I2 increases gradually. This output currents I1, I2 are subjected to an arithmetic processing in a position detecting and processing circuit PDC, and a shifted extent of a center of gravity of brightness is indicated on a meter M. Therefore if a photographic lens 2 is adjusted such that the meter M indecates a minimum value, focusing can be obtained.
JP9961880A 1980-07-15 1980-07-21 Focusing detector Pending JPS5724905A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP9961880A JPS5724905A (en) 1980-07-21 1980-07-21 Focusing detector
US06/281,890 US4441810A (en) 1980-07-15 1981-07-09 Range finder
DE19813127786 DE3127786A1 (en) 1980-07-15 1981-07-14 DISTANCE KNIFE, ESPECIALLY FOR CAMERAS OR THE LIKE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9961880A JPS5724905A (en) 1980-07-21 1980-07-21 Focusing detector

Publications (1)

Publication Number Publication Date
JPS5724905A true JPS5724905A (en) 1982-02-09

Family

ID=14252076

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9961880A Pending JPS5724905A (en) 1980-07-15 1980-07-21 Focusing detector

Country Status (1)

Country Link
JP (1) JPS5724905A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531053A (en) * 1981-09-25 1985-07-23 Sig Societe Industrielle Suisse Railway work machine
US4538061A (en) * 1981-09-25 1985-08-27 Sig Societe Industrielle Suisse Railway work machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531053A (en) * 1981-09-25 1985-07-23 Sig Societe Industrielle Suisse Railway work machine
US4538061A (en) * 1981-09-25 1985-08-27 Sig Societe Industrielle Suisse Railway work machine

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