GB1432947A - Light diverting and/or switching device - Google Patents

Light diverting and/or switching device

Info

Publication number
GB1432947A
GB1432947A GB2791972A GB2791972A GB1432947A GB 1432947 A GB1432947 A GB 1432947A GB 2791972 A GB2791972 A GB 2791972A GB 2791972 A GB2791972 A GB 2791972A GB 1432947 A GB1432947 A GB 1432947A
Authority
GB
United Kingdom
Prior art keywords
light
slab
beams
diverting
june
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
GB2791972A
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.)
EMI Ltd
Original Assignee
EMI 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 EMI Ltd filed Critical EMI Ltd
Priority to GB2791972A priority Critical patent/GB1432947A/en
Publication of GB1432947A publication Critical patent/GB1432947A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
    • H01S3/2383—Parallel arrangements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
    • 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
    • G02F1/29—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 position or the direction of light beams, i.e. deflection
    • G02F1/293—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 position or the direction of light beams, i.e. deflection by another light beam, i.e. opto-optical deflection
    • 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
    • G02F1/35—Non-linear optics
    • G02F1/3511—Self-focusing or self-trapping of light; Light-induced birefringence; Induced optical Kerr-effect

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1432947 Photochromism EMI Ltd 1 June 1973 [15 June 1972] 27919/72 Heading C4S [Also in Division G2] A light diverting or switching device comprises a slab 1 of material exhibiting changes in refractive index when irradiated with two beams 11, 13 of coherent light, a source 5 of said beams, means 10, 14 for directing the beams so that they irradiate the whole of the slab and produce changes in the form of a pattern of parallel bars which effect the diverting or switching of light falling on a minor surface 3 of the slab and means 19 sensing light emerging from another minor surface of the slab. The bars comprise interference fringes and divert light from laser 15 through 90 degrees (out of the plane of the paper) to detector 19. Another detector may sense undiffracted light so that the apparatus acts as a light switch. The fringes are erased by light from laser 20. The body may be tilted or the direction of the incident radiation varied for scanning. The material of slab 1 is rhodamine in ethanol or plastics material or anthracene derivatives.
GB2791972A 1972-06-15 1972-06-15 Light diverting and/or switching device Expired GB1432947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2791972A GB1432947A (en) 1972-06-15 1972-06-15 Light diverting and/or switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2791972A GB1432947A (en) 1972-06-15 1972-06-15 Light diverting and/or switching device

Publications (1)

Publication Number Publication Date
GB1432947A true GB1432947A (en) 1976-04-22

Family

ID=10267412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2791972A Expired GB1432947A (en) 1972-06-15 1972-06-15 Light diverting and/or switching device

Country Status (1)

Country Link
GB (1) GB1432947A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095563A2 (en) * 1982-05-28 1983-12-07 International Business Machines Corporation Opto-optical light deflector
EP0100418A2 (en) * 1982-07-29 1984-02-15 International Business Machines Corporation Opto-optical light deflector
GB2189038A (en) * 1986-04-10 1987-10-14 Stc Plc Optical switching

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095563A2 (en) * 1982-05-28 1983-12-07 International Business Machines Corporation Opto-optical light deflector
EP0095563A3 (en) * 1982-05-28 1986-12-03 International Business Machines Corporation Opto-optical light deflector
EP0100418A2 (en) * 1982-07-29 1984-02-15 International Business Machines Corporation Opto-optical light deflector
EP0100418A3 (en) * 1982-07-29 1986-11-26 International Business Machines Corporation Opto-optical light deflector
GB2189038A (en) * 1986-04-10 1987-10-14 Stc Plc Optical switching
GB2189038B (en) * 1986-04-10 1989-11-29 Stc Plc Optical switching

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee