GB493318A - Improvements in or relating to systems for transmitting intelligence with the aid of a beam of light - Google Patents

Improvements in or relating to systems for transmitting intelligence with the aid of a beam of light

Info

Publication number
GB493318A
GB493318A GB1164937A GB1164937A GB493318A GB 493318 A GB493318 A GB 493318A GB 1164937 A GB1164937 A GB 1164937A GB 1164937 A GB1164937 A GB 1164937A GB 493318 A GB493318 A GB 493318A
Authority
GB
United Kingdom
Prior art keywords
light
lenses
receiver
passed
accordance
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
GB1164937A
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
Priority to GB1164937A priority Critical patent/GB493318A/en
Publication of GB493318A publication Critical patent/GB493318A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum

Abstract

493,318. Photophones ; modulating light. SCOPHONY, Ltd., and WIKKENHAUSER, G. April 23, 1937, No. 11649. [Class 40 (iii)] In a photophone in which a beam of light projected from a transmitter to a receiver is modulated in accordance with the sound transmitted, the light modulation is produced by passing the light through a cell containing liquid in which are formed high frequency compressional waves modulated in accordance with the sound. Light from a source 7, is passed through two cylindrical lenses 8, 12, having power perpendicular to the plane of the figure and between which is a light modulating cell 10 of the type described in Specification 439,236, having faces 9, 11, constituting cylindrical lenses having power at right angles to that of the lenses 8, 12. It is then passed through an aperture in a mask 13 and formed into a parallel beam by a lens 14 for transmission to the receiver. A number of light modulators may be arranged side by side so that each modulates a part of the beam with the same signal, Figs. 5 and 6 (not shown). A reflector may be substituted for the lenses 8, 12, Fig. 3 (not shown).
GB1164937A 1937-04-23 1937-04-23 Improvements in or relating to systems for transmitting intelligence with the aid of a beam of light Expired GB493318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1164937A GB493318A (en) 1937-04-23 1937-04-23 Improvements in or relating to systems for transmitting intelligence with the aid of a beam of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1164937A GB493318A (en) 1937-04-23 1937-04-23 Improvements in or relating to systems for transmitting intelligence with the aid of a beam of light

Publications (1)

Publication Number Publication Date
GB493318A true GB493318A (en) 1938-10-06

Family

ID=9990133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1164937A Expired GB493318A (en) 1937-04-23 1937-04-23 Improvements in or relating to systems for transmitting intelligence with the aid of a beam of light

Country Status (1)

Country Link
GB (1) GB493318A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2557974A (en) * 1945-08-13 1951-06-26 Farnsworth Res Corp Light modulation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2557974A (en) * 1945-08-13 1951-06-26 Farnsworth Res Corp Light modulation system

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