[go: up one dir, main page]

JPS572029A - Lens extension mechanism of automatic focusing camera - Google Patents

Lens extension mechanism of automatic focusing camera

Info

Publication number
JPS572029A
JPS572029A JP7526180A JP7526180A JPS572029A JP S572029 A JPS572029 A JP S572029A JP 7526180 A JP7526180 A JP 7526180A JP 7526180 A JP7526180 A JP 7526180A JP S572029 A JPS572029 A JP S572029A
Authority
JP
Japan
Prior art keywords
lens
escapement
magnetic
lens holder
fitted
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
JP7526180A
Other languages
Japanese (ja)
Inventor
Michiro Hirohata
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 JP7526180A priority Critical patent/JPS572029A/en
Publication of JPS572029A publication Critical patent/JPS572029A/en
Pending 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
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To decrease the number of parts and to make the wiring work, etc. easy, by holding an escapement at a constant position by magnetic force of a permanent magnet in a magnetic circuit. CONSTITUTION:A photographing lens 1 is held by a lens holder 2, the lens holder 2 can execute a reciprocating motion only by a guide groove 2b and it is brought into contact with a distance cam part 4a of a lens feed cam 4 by a lens holder pin 2a. An over-drive gear train 9 is fitted into a rack gear 4c of the lens extension cam 4, the final stage of this gear train 9 is coupled with an escape wheel 10, an escapement 13 whose escape shaft 12 is a center of its rotary reciprocating motion is fitted for a governor operation. And, the escapement 13 is formed by a magnetic material, forms a magnetic circuit together with a yoke 11, a permanent magnet 15, a search coil 16, and a magnetic field forming coil 17, and an output of the search coil is connected to an AF controlling circuit 18.
JP7526180A 1980-06-04 1980-06-04 Lens extension mechanism of automatic focusing camera Pending JPS572029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7526180A JPS572029A (en) 1980-06-04 1980-06-04 Lens extension mechanism of automatic focusing camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7526180A JPS572029A (en) 1980-06-04 1980-06-04 Lens extension mechanism of automatic focusing camera

Publications (1)

Publication Number Publication Date
JPS572029A true JPS572029A (en) 1982-01-07

Family

ID=13571094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7526180A Pending JPS572029A (en) 1980-06-04 1980-06-04 Lens extension mechanism of automatic focusing camera

Country Status (1)

Country Link
JP (1) JPS572029A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041520U (en) * 1990-04-17 1992-01-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041520U (en) * 1990-04-17 1992-01-08

Similar Documents

Publication Publication Date Title
US4676605A (en) Construction of lens barrel operated by electromagnetic induction
JPS5614225A (en) Focusing device
US4307950A (en) Focus adjusting device for camera
JPS56126826A (en) Mounting device of interchangeable lens
JPS5595933A (en) Automatic focusing device of lens barrel
JPS572029A (en) Lens extension mechanism of automatic focusing camera
JPS51120725A (en) Automatic forcusing camera
JPS5284748A (en) Device for finely adjusting position at which laser light is focused
JPS6455510A (en) Multifocused camera
JPS5771530A (en) Pickup device
JPS5374028A (en) Diaphragm device for camera
JPS5782234A (en) Optical head
JPS5512946A (en) Automatic exposure control diaphragm device
ATE69399T1 (en) STUD WELDING MACHINE.
JPS5319028A (en) Automatic focusing device for cinecamera
JPS5778642A (en) Movable optical device
US5144353A (en) Optical system driving device of camera
GB925189A (en) Improvements in or relating to cameras
JPS57212467A (en) Optical series device of copying machine
JPS5251937A (en) Pulse driving means for adjusting diaphragm and focus of camera
JPS5771529A (en) Movable lens for controlling focus
GB1206320A (en) Improvements in or relating to camera diaphragm aperture control devices
JPS54109801A (en) Optical reader
JPS6417225A (en) Objective lens driving device
JPS6454328A (en) Automatic focusing mechanism for lens inspection instrument