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GB1474370A - Light detecting arrangements - Google Patents

Light detecting arrangements

Info

Publication number
GB1474370A
GB1474370A GB2426873A GB2426873A GB1474370A GB 1474370 A GB1474370 A GB 1474370A GB 2426873 A GB2426873 A GB 2426873A GB 2426873 A GB2426873 A GB 2426873A GB 1474370 A GB1474370 A GB 1474370A
Authority
GB
United Kingdom
Prior art keywords
photo
delays
central
modes
angles
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
GB2426873A
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB2426873A priority Critical patent/GB1474370A/en
Priority to DE19742424838 priority patent/DE2424838A1/en
Publication of GB1474370A publication Critical patent/GB1474370A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
    • 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
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
    • H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/10—Semiconductor bodies
    • H10F77/14—Shape of semiconductor bodies; Shapes, relative sizes or dispositions of semiconductor regions within semiconductor bodies
    • H10F77/147—Shapes of bodies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Communication System (AREA)

Abstract

1474370 Photo-electric detectors PLESSEY CO Ltd 17 May 1974 [22 May 1973] 24268/73 Heading G1A An arrangement for detecting various constituent modes of a transmitted light beam comprises: a central light detector and at least one annular light detector disposed coaxially with an axis intersecting the central detector; and electrical delay means associated with at least one of the light detectors. Portions of a light beam transmitted by an optical fibre 6, Fig. 1, undergo delays dependent upon the number of internal reflections within the fibre and characterized by the angles of emergence from the end 5. Thus the fast, direct mode emerges axially while the slow, indirect modes emerge at angles which increase with the delay. An array 1 comprising a central circular photo-cell 2 surrounded by coplanar concentric annular cells 3, 4 &c., detects the various modes. Distortion due to the delays may be minimized by compensating electrical delays 10, 11 between the photo-cell outputs. The arrangement may also be applied to e.g. a Fresnel lens by positioning it between the lens and its focal plane.
GB2426873A 1973-05-22 1973-05-22 Light detecting arrangements Expired GB1474370A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2426873A GB1474370A (en) 1973-05-22 1973-05-22 Light detecting arrangements
DE19742424838 DE2424838A1 (en) 1973-05-22 1974-05-22 LIGHT DETECTOR ARRANGEMENT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2426873A GB1474370A (en) 1973-05-22 1973-05-22 Light detecting arrangements

Publications (1)

Publication Number Publication Date
GB1474370A true GB1474370A (en) 1977-05-25

Family

ID=10209054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2426873A Expired GB1474370A (en) 1973-05-22 1973-05-22 Light detecting arrangements

Country Status (2)

Country Link
DE (1) DE2424838A1 (en)
GB (1) GB1474370A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0705509A1 (en) * 1992-12-01 1996-04-10 Scientific-Atlanta, Inc. An optical communications system for transmitting information signals having different wavelengths over a same optical fiber
WO2000052762A1 (en) * 1999-03-03 2000-09-08 The Boeing Company Multicolor detector and focal plane array using diffractive lenses
WO2008155716A1 (en) 2007-06-21 2008-12-24 Koninklijke Philips Electronics N. V. Microelectronic sensor device for detecting label particles

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556875A (en) * 1981-12-15 1985-12-03 Matsushita Electric Industrial Co., Ltd. Irradiated power monitoring system for optical fiber
DE3232508A1 (en) * 1982-09-01 1984-03-01 Siemens AG, 1000 Berlin und 8000 München Arrangement for determining the intensity of the optical emission of a light-emitting diode
DE3919571A1 (en) * 1989-06-15 1990-12-20 Diehl Gmbh & Co Laser beam intensity profile measuring arrangement - has attenuator with IR transmitting substrate and low transmissivity coating regions in front of detector array
DE4004986A1 (en) * 1990-02-19 1991-08-29 Schott Glaswerke METHOD FOR DETERMINING THE INTENSITY OF THE ELECTROMAGNETIC RADIATION EMITTED BY A RADIATION SOURCE UNDER A SPECIFIC ANGLE TO THEIR AXIS OF SYMMETRY

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0705509A1 (en) * 1992-12-01 1996-04-10 Scientific-Atlanta, Inc. An optical communications system for transmitting information signals having different wavelengths over a same optical fiber
EP0705509A4 (en) * 1992-12-01 1998-04-08 Scientific Atlanta An optical communications system for transmitting information signals having different wavelengths over a same optical fiber
WO2000052762A1 (en) * 1999-03-03 2000-09-08 The Boeing Company Multicolor detector and focal plane array using diffractive lenses
US6236508B1 (en) 1999-03-03 2001-05-22 The Boeing Company Multicolor detector and focal plane array using diffractive lenses
WO2008155716A1 (en) 2007-06-21 2008-12-24 Koninklijke Philips Electronics N. V. Microelectronic sensor device for detecting label particles

Also Published As

Publication number Publication date
DE2424838A1 (en) 1974-12-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee