JPS5762013A - Focusing detecting circuit - Google Patents

Focusing detecting circuit

Info

Publication number
JPS5762013A
JPS5762013A JP13636680A JP13636680A JPS5762013A JP S5762013 A JPS5762013 A JP S5762013A JP 13636680 A JP13636680 A JP 13636680A JP 13636680 A JP13636680 A JP 13636680A JP S5762013 A JPS5762013 A JP S5762013A
Authority
JP
Japan
Prior art keywords
distance
turns
led4
led2
pulses
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
JP13636680A
Other languages
English (en)
Inventor
Akira Takahashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13636680A priority Critical patent/JPS5762013A/ja
Priority to US06/299,291 priority patent/US4479706A/en
Priority to DE3135710A priority patent/DE3135710A1/de
Publication of JPS5762013A publication Critical patent/JPS5762013A/ja
Priority to US06/599,772 priority patent/US4533227A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
JP13636680A 1980-09-09 1980-09-30 Focusing detecting circuit Pending JPS5762013A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP13636680A JPS5762013A (en) 1980-09-30 1980-09-30 Focusing detecting circuit
US06/299,291 US4479706A (en) 1980-09-09 1981-09-03 Distance measuring circuit
DE3135710A DE3135710A1 (de) 1980-09-09 1981-09-09 Entfernungsmesser-schaltanordnung
US06/599,772 US4533227A (en) 1980-09-09 1984-04-13 Distance measuring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13636680A JPS5762013A (en) 1980-09-30 1980-09-30 Focusing detecting circuit

Publications (1)

Publication Number Publication Date
JPS5762013A true JPS5762013A (en) 1982-04-14

Family

ID=15173481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13636680A Pending JPS5762013A (en) 1980-09-09 1980-09-30 Focusing detecting circuit

Country Status (1)

Country Link
JP (1) JPS5762013A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100009A (ja) * 1983-11-05 1985-06-03 Ricoh Co Ltd 距離検出装置
JPS60168034A (ja) * 1984-02-13 1985-08-31 Tokuda Seisakusho Ltd リ−ク試験装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518690A (en) * 1978-07-21 1980-02-08 Agfa Gevaert Ag Camera focus adjuster

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5518690A (en) * 1978-07-21 1980-02-08 Agfa Gevaert Ag Camera focus adjuster

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100009A (ja) * 1983-11-05 1985-06-03 Ricoh Co Ltd 距離検出装置
JPS60168034A (ja) * 1984-02-13 1985-08-31 Tokuda Seisakusho Ltd リ−ク試験装置

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