GB543802A - Improvements in or relating to means for modulating a light beam - Google Patents

Improvements in or relating to means for modulating a light beam

Info

Publication number
GB543802A
GB543802A GB13142A GB13142A GB543802A GB 543802 A GB543802 A GB 543802A GB 13142 A GB13142 A GB 13142A GB 13142 A GB13142 A GB 13142A GB 543802 A GB543802 A GB 543802A
Authority
GB
United Kingdom
Prior art keywords
cylinder
light
axis
block
light beam
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
GB13142A
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.)
Scophony Ltd
Original Assignee
Scophony Ltd
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 Scophony Ltd filed Critical Scophony Ltd
Publication of GB543802A publication Critical patent/GB543802A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier
    • H04N7/063—Simultaneous transmission of separate parts of one picture

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Soil Working Implements (AREA)

Abstract

543,802. Light valves. SCOPHONY, Ltd., and OKOLICSANYI, F. July 8, 1941, No. 131/42. Divided out of 543,185. [Class 40 (iii)] A light-beam obturating device for producing sinusoidal fluctuations of the beam intended to act on a photo-electric cell, especially for use in television apparatus as claimed in Specification 543,185, comprises a right circular cylinder 27, Fig. 1, rotatably mounted about an axis of rotation 28 which is parallel to and offset from the axis of the cylinder, said cylinder forming one bounding edge of the light beam passing through an aperture 29 between blocks 25, 26. The block 25 is hollow to permit the rotation of the cylinder 27 ; and the other block 26 is flat and bounds the other edge of the light beam. The block 26 may be adjustable laterally to allow a certain amount of light to pass in the zero position 27<SP>1</SP> of the cylinder indicated by dotted lines. The cylinder 27 is attached to collars 30, Fig. 2, on end spindles 28 ; and lead plugs 31 are inserted in these collars to balance the rotational system about its axis. Specification 472,009 also is referred to.
GB13142A 1940-06-10 1941-07-08 Improvements in or relating to means for modulating a light beam Expired GB543802A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1012540A GB543185A (en) 1940-06-10 1940-06-10 Improvements in or relating to television systems

Publications (1)

Publication Number Publication Date
GB543802A true GB543802A (en) 1942-03-12

Family

ID=9961963

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1012540A Expired GB543185A (en) 1940-06-10 1940-06-10 Improvements in or relating to television systems
GB13142A Expired GB543802A (en) 1940-06-10 1941-07-08 Improvements in or relating to means for modulating a light beam

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1012540A Expired GB543185A (en) 1940-06-10 1940-06-10 Improvements in or relating to television systems

Country Status (1)

Country Link
GB (2) GB543185A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087122A (en) * 1990-08-13 1992-02-11 Laser Precision Corporation Adjustable attenuator for optical transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087122A (en) * 1990-08-13 1992-02-11 Laser Precision Corporation Adjustable attenuator for optical transmission system

Also Published As

Publication number Publication date
GB543185A (en) 1942-02-13

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