GB1354225A - Camera viewfinder with electro-optical indicator device - Google Patents

Camera viewfinder with electro-optical indicator device

Info

Publication number
GB1354225A
GB1354225A GB1354225DA GB1354225A GB 1354225 A GB1354225 A GB 1354225A GB 1354225D A GB1354225D A GB 1354225DA GB 1354225 A GB1354225 A GB 1354225A
Authority
GB
United Kingdom
Prior art keywords
electrodes
electro
camera viewfinder
indicator device
exposure
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.)
Expired
Application number
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.)
Pentacon GmbH Foto und Feinwerktechnik
Original Assignee
Pentacon Dresden VEB
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 Pentacon Dresden VEB filed Critical Pentacon Dresden VEB
Publication of GB1354225A publication Critical patent/GB1354225A/en
Expired 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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/18—Signals indicating condition of a camera member or suitability of light
    • G03B17/20—Signals indicating condition of a camera member or suitability of light visible in viewfinder
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders
    • 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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/02—Viewfinders

Abstract

1354225 Camera PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 27 June 1972 29985/72 Heading G2A A camera viewfinder has a liquid crystal device 2 for indicating, for example, exposure, battery potential or the cocked state of the shutter. As shown the device 2 comprises vapour deposited SnO 2 electrodes 4, 6, 7, 8. Electrode 4 is continuous and electrodes 6, 7, 8 are symbols standing for under, correct and over exposure respectively. An exposure control circuit (not shown) applies a potential to an appropriate one of electrodes 6, 7, 8.
GB1354225D 1972-06-27 1972-06-27 Camera viewfinder with electro-optical indicator device Expired GB1354225A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2998572 1972-06-27

Publications (1)

Publication Number Publication Date
GB1354225A true GB1354225A (en) 1974-06-05

Family

ID=10300399

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1354225D Expired GB1354225A (en) 1972-06-27 1972-06-27 Camera viewfinder with electro-optical indicator device

Country Status (1)

Country Link
GB (1) GB1354225A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142786A (en) * 1976-09-09 1979-03-06 Canon Kabushiki Kaisha Liquid crystal display device for a camera
US4372657A (en) * 1980-06-17 1983-02-08 West Electric Co., Ltd. Device for indicating photographic exposure conditions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142786A (en) * 1976-09-09 1979-03-06 Canon Kabushiki Kaisha Liquid crystal display device for a camera
US4372657A (en) * 1980-06-17 1983-02-08 West Electric Co., Ltd. Device for indicating photographic exposure conditions

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee