[go: up one dir, main page]

GB1224383A - An optical-electronic system for stabilizing a controllable recording lamp - Google Patents

An optical-electronic system for stabilizing a controllable recording lamp

Info

Publication number
GB1224383A
GB1224383A GB3031168A GB3031168A GB1224383A GB 1224383 A GB1224383 A GB 1224383A GB 3031168 A GB3031168 A GB 3031168A GB 3031168 A GB3031168 A GB 3031168A GB 1224383 A GB1224383 A GB 1224383A
Authority
GB
United Kingdom
Prior art keywords
lamp
light
photo
light intensity
recording
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
GB3031168A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1224383A publication Critical patent/GB1224383A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/23—Reproducing arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/041—Controlling the light-intensity of the source
    • H05B39/042—Controlling the light-intensity of the source by measuring the incident light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

1,224,383. Automatic control of light intensity. DR. -ING. RUDOLF HELL. June 25, 1968 [July 27, 1967], No.30311/68. Heading G3R. A recording lamp controlled in dependence on an input signal in electronic line-by-line photographic reproduction apparatus is also controlled by a negative feedback signal from a photo-cell responsive to light from the lamp. As shown, a a discharge lamp 4, used for photographic recording in picture telegraphy apparatus, is supplied in series with a triode valve 1 which is grid modulated to produce the picture. Light from the lamp passes through a diaphragm 7 and lens 5 and 8 to recording paper or film 9 on a rotating drum 10. A portion of the light is reflected by a semitransparent mirror 12 on to a photo-cell or photomultiplier 14 the amplified output of which is fed back negatively to the grid of valve 1. Light intensity is thus maintained in correspondence with the magnitude of the modulating signal even if the lamp is changed. A linear relationship between the light intensity and the modulating signal is achieved by suitable choice of the characteristics of photo device 14. Several discharge lamps may be operated simultaneously.
GB3031168A 1967-07-27 1968-06-25 An optical-electronic system for stabilizing a controllable recording lamp Expired GB1224383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0063416 1967-07-27

Publications (1)

Publication Number Publication Date
GB1224383A true GB1224383A (en) 1971-03-10

Family

ID=7162300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3031168A Expired GB1224383A (en) 1967-07-27 1968-06-25 An optical-electronic system for stabilizing a controllable recording lamp

Country Status (2)

Country Link
FR (1) FR1575187A (en)
GB (1) GB1224383A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102567467B1 (en) * 2017-08-22 2023-08-16 가부시키가이샤 니혼포토사이언스 Discharge lamps and discharge lamp devices

Also Published As

Publication number Publication date
FR1575187A (en) 1969-07-18

Similar Documents

Publication Publication Date Title
GB1392198A (en) Range finder including photo electric devices
US2606245A (en) Unsharp mask in electronic color correction
GB1424410A (en) Methods of and systems for sharpness in the reproduction of continuous-tone pictures
US3183766A (en) Photographic printing apparatus
GB1120589A (en) Method of and apparatus for photographic reproduction with tone correction
US2238762A (en) Power regulator
GB1447973A (en) Image reproduction method and apparatus
GB1224383A (en) An optical-electronic system for stabilizing a controllable recording lamp
US2921512A (en) Photographic printing
US3068361A (en) Function generator
GB1310495A (en) Production of photographic colour prints
GB1178833A (en) Improvements in or relating to apparatus for Composing Print
US3000286A (en) Apparatus for photographic printing
GB1169822A (en) Image Transfer System
US3823262A (en) Facsimile recorder with compensation of the electrosensitive blank nonlinear applied voltage-burn characteristic
GB1451082A (en) Exposing scanners for image reproduction
GB1213479A (en) Method and apparatus for exposure regulation in a photographic colour printing process
US3851094A (en) Image pick-up-display system
GB751909A (en) Automatic-gain-control system for photoelectric engraving machines
GB1204996A (en) Photographic timing apparatus responsive to optical density
US2252263A (en) Method and arrangement for the transmission of images
US3153726A (en) Photosensitive automatic contrast control for facsimile
SE305802B (en)
GB652060A (en) Improvements relating to apparatus for generating picture signals suitable for television transmission, from cinematograph film
GB529985A (en) Apparatus for the production of temporary positives from photographic negatives