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DD124848A1 - DEVICE FOR LIGHT CURRENT CONTROL - Google Patents

DEVICE FOR LIGHT CURRENT CONTROL

Info

Publication number
DD124848A1
DD124848A1 DD187437A DD18743775A DD124848A1 DD 124848 A1 DD124848 A1 DD 124848A1 DD 187437 A DD187437 A DD 187437A DD 18743775 A DD18743775 A DD 18743775A DD 124848 A1 DD124848 A1 DD 124848A1
Authority
DD
German Democratic Republic
Prior art keywords
current control
light current
light
control
current
Prior art date
Application number
DD187437A
Other languages
German (de)
Inventor
Hans Jehmlich
Original Assignee
Hans Jehmlich
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 Hans Jehmlich filed Critical Hans Jehmlich
Priority to DD187437A priority Critical patent/DD124848A1/en
Priority to DE2630593A priority patent/DE2630593C2/en
Publication of DD124848A1 publication Critical patent/DD124848A1/en

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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/03—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
    • G02F1/05—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect with ferro-electric properties
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/099—Arrangement of photoelectric elements in or on the camera

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Diaphragms For Cameras (AREA)
DD187437A 1975-07-24 1975-07-24 DEVICE FOR LIGHT CURRENT CONTROL DD124848A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DD187437A DD124848A1 (en) 1975-07-24 1975-07-24 DEVICE FOR LIGHT CURRENT CONTROL
DE2630593A DE2630593C2 (en) 1975-07-24 1976-07-07 Camera with automatic exposure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD187437A DD124848A1 (en) 1975-07-24 1975-07-24 DEVICE FOR LIGHT CURRENT CONTROL

Publications (1)

Publication Number Publication Date
DD124848A1 true DD124848A1 (en) 1977-03-16

Family

ID=5501143

Family Applications (1)

Application Number Title Priority Date Filing Date
DD187437A DD124848A1 (en) 1975-07-24 1975-07-24 DEVICE FOR LIGHT CURRENT CONTROL

Country Status (2)

Country Link
DD (1) DD124848A1 (en)
DE (1) DE2630593C2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5496997A (en) * 1978-01-17 1979-07-31 Minolta Camera Co Ltd Electrochromic light volume control component
DE2816861A1 (en) * 1978-04-18 1979-10-31 Agfa Gevaert Ag SHUTTER FOR A PHOTOGRAPHIC CAMERA
DE2935184C2 (en) * 1979-08-31 1982-04-29 Standard Elektrik Lorenz Ag, 7000 Stuttgart Electro-optical shutter.
US4509848A (en) * 1982-02-08 1985-04-09 Canon Kabushiki Kaisha Light measuring device for camera
DD206250A1 (en) * 1982-08-16 1984-01-18 Pentacon Dresden Veb PHOTOELECTRIC MEASURING DEVICE FOR CAMERAS
US5387958A (en) * 1992-06-30 1995-02-07 Sony Electronics, Inc. Electro-optical control of light attenuation in the optical path of a camera
DE19804312C1 (en) * 1998-02-04 1999-09-16 Bayer Ag Image recording unit, especially a photographic or semiconductor detector camera, has electronically controlled light exposure
KR101912718B1 (en) * 2011-05-30 2018-10-29 삼성전자주식회사 Optical image shutter and method of fabricating the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3661442A (en) * 1969-03-25 1972-05-09 Hitachi Ltd Electrically operated optical shutter
US3911457A (en) * 1972-02-07 1975-10-07 Canon Kk Viewfinder for single lens reflex cameras including means to view exposure guides
DE2329014C2 (en) * 1973-06-07 1983-04-28 Agfa-Gevaert Ag, 5090 Leverkusen Screen arrangement with at least one liquid crystal element
JPS5840172B2 (en) * 1973-07-28 1983-09-03 沖電気工業株式会社 camera

Also Published As

Publication number Publication date
DE2630593C2 (en) 1983-09-22
DE2630593A1 (en) 1977-02-10

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Legal Events

Date Code Title Description
NPI Change in the person, name or address of the patentee (addendum to changes before extension act)