IE781972L - Automatic and manual variable focusing lens system - Google Patents

Automatic and manual variable focusing lens system

Info

Publication number
IE781972L
IE781972L IE197278A IE197278A IE781972L IE 781972 L IE781972 L IE 781972L IE 197278 A IE197278 A IE 197278A IE 197278 A IE197278 A IE 197278A IE 781972 L IE781972 L IE 781972L
Authority
IE
Ireland
Prior art keywords
automatic
barrier
manual
lens system
focusing lens
Prior art date
Application number
IE197278A
Other versions
IE47956B1 (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 IE781972L publication Critical patent/IE781972L/en
Publication of IE47956B1 publication Critical patent/IE47956B1/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
    • G02B7/40—Systems for automatic generation of focusing signals using time delay of the reflected waves, e.g. of ultrasonic waves

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Lens Barrels (AREA)
  • Automatic Focus Adjustment (AREA)
  • Shutters For Cameras (AREA)

Abstract

A camera has automatic and manual focussing controls and means for preventing simultaneous operation thereof. As shown, a displaceable barrier 52 in one position prevents operation of a manual focus actuator 50, an automatic acoustic focusing system 12, 22, 26 being then operative. In another position, the barrier 52 is displaced allowing access to the manual focus actuator 50, the displacement of the barrier simultaneously disengaging the drive 30 from the automatic focusing means to the variable focus lens. The displacement of the barrier may also serve to remove electrical energy from the automatic focusing system to conserve electrical power. The invention is particularly intended for folding, self- processing cameras. <IMAGE> [GB2005852A]
IE197278A 1977-10-03 1978-10-02 Apparatus having automatic and manual ranging means IE47956B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83858177A 1977-10-03 1977-10-03

Publications (2)

Publication Number Publication Date
IE781972L true IE781972L (en) 1979-04-03
IE47956B1 IE47956B1 (en) 1984-08-08

Family

ID=25277484

Family Applications (1)

Application Number Title Priority Date Filing Date
IE197278A IE47956B1 (en) 1977-10-03 1978-10-02 Apparatus having automatic and manual ranging means

Country Status (6)

Country Link
JP (1) JPS5461525A (en)
CA (1) CA1122454A (en)
DE (1) DE2842851B2 (en)
FR (1) FR2404868A1 (en)
GB (1) GB2005852B (en)
IE (1) IE47956B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5573026A (en) * 1978-11-25 1980-06-02 Minolta Camera Co Ltd Automatic-manual focus controllable lens-barrel
JPS5573025A (en) * 1978-11-25 1980-06-02 Minolta Camera Co Ltd Changeover device of automatic-manual focus controllable lens-barrel
JPS5619033A (en) * 1979-07-25 1981-02-23 Canon Inc Automatic focus control unit
JPS5648620A (en) * 1979-09-28 1981-05-01 Nippon Seimitsu Kogyo Kk Automatic focus controlling mechanism of camera
JPS62201738U (en) * 1986-06-13 1987-12-23

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH400602A (en) * 1961-07-29 1965-10-15 Agfa Ag Lens with variable focal length, with a device for optional focal length adjustment by hand and by a motor
US3522764A (en) * 1968-03-25 1970-08-04 Polaroid Corp Rangefinding and focusing system for photographic cameras and the like

Also Published As

Publication number Publication date
DE2842851A1 (en) 1979-04-05
FR2404868B1 (en) 1984-08-10
CA1122454A (en) 1982-04-27
JPS5461525A (en) 1979-05-17
JPS5751084B2 (en) 1982-10-30
GB2005852A (en) 1979-04-25
GB2005852B (en) 1982-03-17
IE47956B1 (en) 1984-08-08
DE2842851C3 (en) 1980-07-17
DE2842851B2 (en) 1979-10-31
FR2404868A1 (en) 1979-04-27

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Legal Events

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MM4A Patent lapsed