GB380522A - An improved means of varying the intensity of a beam of a radiation, from a steady source, so that its variations follow the characteristics of an electric current - Google Patents

An improved means of varying the intensity of a beam of a radiation, from a steady source, so that its variations follow the characteristics of an electric current

Info

Publication number
GB380522A
GB380522A GB1348031A GB1348031A GB380522A GB 380522 A GB380522 A GB 380522A GB 1348031 A GB1348031 A GB 1348031A GB 1348031 A GB1348031 A GB 1348031A GB 380522 A GB380522 A GB 380522A
Authority
GB
United Kingdom
Prior art keywords
varying
image
radiation
lens
intensity
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
GB1348031A
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
Priority to GB1348031A priority Critical patent/GB380522A/en
Publication of GB380522A publication Critical patent/GB380522A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

380,522. Television apparatus. MOBSBY, E. G. H., 5, Talbot Houses, Blackheath, London. March 5, 1932, No. 13480. [Class 40 (iii).] Apparatus for varying the intensity of a radiation from a constant source in accordance with variations of an electric current, applicable for recording sound and in television, comprises an achromatic convex lens with axially spherical surfaces, a source of radiation placed at twice the focal distance at one side of the lens to produce an image at the same distance on the other side, and a shutter fixed to a moving coil vibrated electromatically by the varying current positioned at, and movable in the line of, the image. Alternatively, the lens may be replaced by a truly spherical concave mirror in which case the source and image are adjacent to each other at the centre of curvation of the mirror. The image should not subtend an angle of more than two degrees on each side of the optical axis. In a television reproducer, the varying intensity passing the shutter S, Fig. 3, is concentrated by a condenser B upon a system of square holes in a scanning disc D arranged in front of a projection lens P.
GB1348031A 1932-03-05 1932-03-05 An improved means of varying the intensity of a beam of a radiation, from a steady source, so that its variations follow the characteristics of an electric current Expired GB380522A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1348031A GB380522A (en) 1932-03-05 1932-03-05 An improved means of varying the intensity of a beam of a radiation, from a steady source, so that its variations follow the characteristics of an electric current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1348031A GB380522A (en) 1932-03-05 1932-03-05 An improved means of varying the intensity of a beam of a radiation, from a steady source, so that its variations follow the characteristics of an electric current

Publications (1)

Publication Number Publication Date
GB380522A true GB380522A (en) 1932-09-22

Family

ID=10023730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1348031A Expired GB380522A (en) 1932-03-05 1932-03-05 An improved means of varying the intensity of a beam of a radiation, from a steady source, so that its variations follow the characteristics of an electric current

Country Status (1)

Country Link
GB (1) GB380522A (en)

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