IE782563L - Focus control system - Google Patents

Focus control system

Info

Publication number
IE782563L
IE782563L IE256378A IE256378A IE782563L IE 782563 L IE782563 L IE 782563L IE 256378 A IE256378 A IE 256378A IE 256378 A IE256378 A IE 256378A IE 782563 L IE782563 L IE 782563L
Authority
IE
Ireland
Prior art keywords
lens
region
focusing
reference point
camera
Prior art date
Application number
IE256378A
Other versions
IE48251B1 (en
Original Assignee
Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Publication of IE782563L publication Critical patent/IE782563L/en
Publication of IE48251B1 publication Critical patent/IE48251B1/en

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
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
    • 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
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Lens Barrels (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

A focus control system in a photographic camera, for example, includes a rangefinder (14) (preferably acoustic) and driving means (38) responsive to a signal from the rangefinder for moving a movable element of a variable focus lens to a focused position. In addition to being movable throughout a first region in which it focuses at an image plane images of objects within a given range, the lens is also movable in a second region which is outside its focusing region. Prior to an automatic focusing operation, the lens is always returned to this second region, so that automatic focusing movement is unidirectional and always starts from the same reference point. The return movement of the lens to the reference point may be a part of an automobile focusing and exposure cycle, in a camera. Where provision is made for manually focusing the lens, as an alternative to automatic focusing, means may be provided for automatically returning the lens to its reference point after a manual exposure cycle in the camera. <IMAGE> [GB2013353A]
IE256378A 1977-12-30 1978-12-28 Focus control system for variable focus lenses IE48251B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86585277A 1977-12-30 1977-12-30

Publications (2)

Publication Number Publication Date
IE782563L true IE782563L (en) 1979-06-30
IE48251B1 IE48251B1 (en) 1984-11-14

Family

ID=25346383

Family Applications (1)

Application Number Title Priority Date Filing Date
IE256378A IE48251B1 (en) 1977-12-30 1978-12-28 Focus control system for variable focus lenses

Country Status (9)

Country Link
JP (1) JPS54109837A (en)
AT (1) AT377101B (en)
AU (1) AU525816B2 (en)
CA (1) CA1122455A (en)
CH (1) CH637222A5 (en)
DE (1) DE2856573A1 (en)
FR (1) FR2413680A1 (en)
GB (1) GB2013353B (en)
IE (1) IE48251B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56133722A (en) * 1980-03-03 1981-10-20 Polaroid Corp Device for focusing image for photographic camera and method therfor
JPS59125718A (en) * 1983-01-06 1984-07-20 Canon Inc Copying device
WO2018139168A1 (en) 2017-01-27 2018-08-02 富士フイルム株式会社 Camera system, camera, lens, accessory, and method for detecting camera system accessory

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2105288B2 (en) * 1970-02-14 1973-03-15 Kabushiki Kaisha Ricoh, Tokio CAMERA WITH AUTOMATIC FOCUSING
US3917395A (en) * 1973-06-28 1975-11-04 Honeywell Inc Control circuit for photographic apparatus
CA1099554A (en) * 1976-10-04 1981-04-21 Polaroid Corporation Automatic range finding and focussing camera

Also Published As

Publication number Publication date
ATA1279A (en) 1984-06-15
CH637222A5 (en) 1983-07-15
FR2413680B1 (en) 1983-11-18
AU4306279A (en) 1979-07-05
AT377101B (en) 1985-02-11
IE48251B1 (en) 1984-11-14
DE2856573A1 (en) 1979-07-05
GB2013353B (en) 1982-05-19
JPS54109837A (en) 1979-08-28
GB2013353A (en) 1979-08-08
AU525816B2 (en) 1982-12-02
CA1122455A (en) 1982-04-27
FR2413680A1 (en) 1979-07-27

Similar Documents

Publication Publication Date Title
JPS57186872A (en) Auto-focusing device of video camera
EP0725292A3 (en) Image magnification control device for a camera
KR970007469A (en) LENS DRIVING DEVICE AND IMAGING DEVICE USING THE SAME
IE782563L (en) Focus control system
US4462671A (en) Camera warning shake system
JPS5540447A (en) Image correcting method in zoom lens
JPS51120725A (en) Automatic forcusing camera
JPS6479712A (en) Automatic focusing adjuster
JPS55127524A (en) Automatic focus control unit
JPS6442639A (en) Automatic focusing system
JPS55110231A (en) Automatic focus indicator of camera
JPS5486325A (en) Cine camera of automatic focus control type
JPS6119975B2 (en)
JPS6267971A (en) Video camera
JPS57196665A (en) Automatic forcusing device
JPS55106425A (en) Single-lens reflex camera
JPS5552030A (en) Focusing optical device for single-lens reflex camera
JPS5231755A (en) Automatic forcusing device
KR940001684A (en) Method and device for measuring distance and height using camcorder
JPS57146227A (en) Autofocus camera
JPH047531A (en) Camera with automatic programmed zooming function
JPS5654416A (en) Automatic focusing device of camera
JPS6431111A (en) Automatic focusing device
JPH047529A (en) Camera with automatic programmed zooming function
JPS5726812A (en) Focus control device