JPS55108632A - Focus position detector - Google Patents

Focus position detector

Info

Publication number
JPS55108632A
JPS55108632A JP1562979A JP1562979A JPS55108632A JP S55108632 A JPS55108632 A JP S55108632A JP 1562979 A JP1562979 A JP 1562979A JP 1562979 A JP1562979 A JP 1562979A JP S55108632 A JPS55108632 A JP S55108632A
Authority
JP
Japan
Prior art keywords
automatic focusing
lens
focusing lens
circuit
lens frame
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
JP1562979A
Other languages
Japanese (ja)
Inventor
Takashi Kodama
Hiroaki Nakamura
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.)
Olympus Corp
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP1562979A priority Critical patent/JPS55108632A/en
Publication of JPS55108632A publication Critical patent/JPS55108632A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To achieve simpler and smaller construction by eccentrically rotating an automatic focusing lens by way of a lens frame and detecting its focusing point.
CONSTITUTION: A lens frame 1 is provided rotatable about the central axis l and movably in the arrow direction along the central axis l, to the camera body 2. An automatic focusing lens 3 is eccentricaly mounted and held to this. The focus detection is performed while the lens frame 1, hence automatic focusing lens 3 are being revolved and moved by motors 4, 5. As a result of this, the revolution of the automatic focusing lens 3 makes the similar action as that a photo detector 6 is rotated, whereby the focus condition is detected and the output of the photo detector 6 changes and is sent to a peak value detecting circuit 12 via low-pass filter 8, amplifier 9, wave form rectifier circuit 10 and differentiating circuit 11. The focusing signal corresponding to the focus condition is thereby formed and the driving and stopping of motors 4, 5 is accomplished by a motor control circuit 13.
COPYRIGHT: (C)1980,JPO&Japio
JP1562979A 1979-02-14 1979-02-14 Focus position detector Pending JPS55108632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1562979A JPS55108632A (en) 1979-02-14 1979-02-14 Focus position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1562979A JPS55108632A (en) 1979-02-14 1979-02-14 Focus position detector

Publications (1)

Publication Number Publication Date
JPS55108632A true JPS55108632A (en) 1980-08-21

Family

ID=11894000

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1562979A Pending JPS55108632A (en) 1979-02-14 1979-02-14 Focus position detector

Country Status (1)

Country Link
JP (1) JPS55108632A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509304A (en) * 1973-05-22 1975-01-30
JPS525849A (en) * 1975-06-26 1977-01-17 Unitech Chemical Inc Heattsensitive carboxylated copolymer adhesive and its production method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509304A (en) * 1973-05-22 1975-01-30
JPS525849A (en) * 1975-06-26 1977-01-17 Unitech Chemical Inc Heattsensitive carboxylated copolymer adhesive and its production method

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