GB1272029A - Improvements relating to scanning devices - Google Patents

Improvements relating to scanning devices

Info

Publication number
GB1272029A
GB1272029A GB5801970A GB5801970A GB1272029A GB 1272029 A GB1272029 A GB 1272029A GB 5801970 A GB5801970 A GB 5801970A GB 5801970 A GB5801970 A GB 5801970A GB 1272029 A GB1272029 A GB 1272029A
Authority
GB
United Kingdom
Prior art keywords
guide
light
elastic wave
source
waves
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
GB5801970A
Inventor
Brian William Manley
John Seigfried Palfreeman
George Vincent Carcasson
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB5801970A priority Critical patent/GB1272029A/en
Publication of GB1272029A publication Critical patent/GB1272029A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/103—Scanning systems having movable or deformable optical fibres, light guides or waveguides as scanning elements
    • 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
    • G02F1/31—Digital deflection, i.e. optical switching
    • G02F1/315—Digital deflection, i.e. optical switching based on the use of controlled internal reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2852—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using tapping light guides arranged sidewardly, e.g. in a non-parallel relationship with respect to the bus light guides (light extraction or launching through cladding, with or without surface discontinuities, bent structures)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Semiconductor Lasers (AREA)

Abstract

1,272,029. Deflecting light. MULLARD Ltd. 7 Dec., 1970, No. 58019/70. Heading H4F. [Also in Division G5] A scanning device comprises a light guide GL operating by total internal reflection, a transparent member M spaced from the guide and parallel thereto, and means T for causing an elastic wave to propagate along either the guide GL (as shown) or the member M, Fig. 4 (not shown), whereby local surface distortions S thereof reduce the distance d between the guide GL and member M and permit light from a source S propagating along guide GL to escape therefrom through the member M by frustrated total internal reflection (the phenomenon wherein when light transmissive surfaces are spaced by a distance of less than a wavelength, light energy is coupled from one surface to the other). The guide and member M are suitably of glass and the light and elastic wave may travel in the same or opposite directions, both being absorbed at the other end of the device, e.g. by an elastic wave absorber A. A parallel array of such devices, or a single device with mechanical means for effecting a frame scan component, may be used in a television receiver or a radar display, in which case the source S may be a white light source and a Kerr cell, or a modulated laser, or three coloured sources and modulators which are combined via dichroic mirrors. The elastic waves are either bulk waves, e.g. from quartz or BaTiO 3 transducers applying endwise or lateral pressure to the guide or member M, or they may be surface waves, e.g. from an interdigital comb transducer. The constant spacing required between the guide and the member M may be produced by grinding their opposed surfaces together, or by using glass fibre techniques such as starting with a thick glass rod within a thick glass tube and drawing both down to the required size and spacing. In either construction, ribs or spacers are provided.
GB5801970A 1970-12-07 1970-12-07 Improvements relating to scanning devices Expired GB1272029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5801970A GB1272029A (en) 1970-12-07 1970-12-07 Improvements relating to scanning devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5801970A GB1272029A (en) 1970-12-07 1970-12-07 Improvements relating to scanning devices

Publications (1)

Publication Number Publication Date
GB1272029A true GB1272029A (en) 1972-04-26

Family

ID=10480597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5801970A Expired GB1272029A (en) 1970-12-07 1970-12-07 Improvements relating to scanning devices

Country Status (1)

Country Link
GB (1) GB1272029A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006097038A1 (en) * 2005-03-16 2006-09-21 Chia-Yi Hsu An imaging module
WO2008034326A1 (en) * 2006-09-20 2008-03-27 Chia-Yi Hsu Ornamental board with decorating action

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006097038A1 (en) * 2005-03-16 2006-09-21 Chia-Yi Hsu An imaging module
WO2008034326A1 (en) * 2006-09-20 2008-03-27 Chia-Yi Hsu Ornamental board with decorating action

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees