IT1032494B - Impianto di radio ricezione per veicoli stradali - Google Patents

Impianto di radio ricezione per veicoli stradali

Info

Publication number
IT1032494B
IT1032494B IT48854/75A IT4885475A IT1032494B IT 1032494 B IT1032494 B IT 1032494B IT 48854/75 A IT48854/75 A IT 48854/75A IT 4885475 A IT4885475 A IT 4885475A IT 1032494 B IT1032494 B IT 1032494B
Authority
IT
Italy
Prior art keywords
reception system
radio reception
road vehicles
vehicles
road
Prior art date
Application number
IT48854/75A
Other languages
English (en)
Other versions
IT7548854A1 (it
Original Assignee
Lucas Electrical 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 Lucas Electrical Co Ltd filed Critical Lucas Electrical Co Ltd
Publication of IT7548854A1 publication Critical patent/IT7548854A1/it
Application granted granted Critical
Publication of IT1032494B publication Critical patent/IT1032494B/it

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0994—Fibers, light pipes
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0927—Systems for changing the beam intensity distribution, e.g. Gaussian to top-hat
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/30—Collimators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/40—Optical focusing aids
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
    • H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Optical Elements Other Than Lenses (AREA)
IT48854/75A 1974-04-05 1975-03-28 Impianto di radio ricezione per veicoli stradali IT1032494B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US458124A US3887262A (en) 1974-04-05 1974-04-05 Light equalizer and method of making same

Publications (2)

Publication Number Publication Date
IT7548854A1 IT7548854A1 (it) 1976-09-28
IT1032494B true IT1032494B (it) 1979-05-30

Family

ID=23819465

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48854/75A IT1032494B (it) 1974-04-05 1975-03-28 Impianto di radio ricezione per veicoli stradali

Country Status (4)

Country Link
US (3) US3887262A (it)
BE (1) BE827426A (it)
CA (1) CA1019180A (it)
IT (1) IT1032494B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7613686A (nl) * 1975-12-11 1977-06-14 Pilkington Brothers Ltd Optische vezelkabel.
CA1050795A (en) * 1975-12-23 1979-03-20 Byron E. Marcus Diffusion device for compensating for non-uniform photomultiplier cathode sensitivity
DE2952209C2 (de) * 1979-12-22 1984-03-15 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Anordnung zur punkt- und zeilenweisen Aufzeichnung von Bildinformationen
JPS5983105A (ja) * 1982-09-29 1984-05-14 コヒーレント・インコーポレイテッド 高効率中ｉｒ波長伝送用可撓誘電導波管
AU2002354814A1 (en) * 2001-07-06 2003-01-21 Exfo Electro-Optical Engineering Inc Optical attenuation system
US20130055818A1 (en) * 2011-09-01 2013-03-07 United Solar Ovonic Llc Pressure control in continuous plasma deposition processes

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1880414A (en) * 1930-01-03 1932-10-04 Eastman Kodak Co Illuminating system for photographic apparatus
US2443918A (en) * 1944-06-19 1948-06-22 Rhone Poulenc Sa Light-diffusing cellulose acetate compositions
US3198059A (en) * 1960-02-08 1965-08-03 American Optical Corp Fiber energy conducting device having a heat shrunken tubular fitting
US3227044A (en) * 1960-09-23 1966-01-04 Eastman Kodak Co Method of controlling the spectral composition of a light source by the utilization of color control and correcting light filters
US3301781A (en) * 1964-10-27 1967-01-31 Gen Motors Corp Method of making magnesium fluoride articles
US3345239A (en) * 1965-04-05 1967-10-03 American Cyanamid Co Method for producing decorative articles of manufacture
US3365271A (en) * 1966-02-25 1968-01-23 Eastman Kodak Co Magnesium fluoride optical element
US3615756A (en) * 1967-07-03 1971-10-26 Gen Electric Transparent thoria-base ceramics and method for producing same
US3711262A (en) * 1970-05-11 1973-01-16 Corning Glass Works Method of producing optical waveguide fibers
IT956956B (it) * 1972-06-09 1973-10-10 Durst Spa Fabbrica Macchine Ed Dispositivo per la regolazione continua della quantita e della intensita di luce particolarmen te in apparecchi di ingrandimento

Also Published As

Publication number Publication date
US4111731A (en) 1978-09-05
BE827426A (fr) 1975-07-31
US4112028A (en) 1978-09-05
IT7548854A1 (it) 1976-09-28
CA1019180A (en) 1977-10-18
US3887262A (en) 1975-06-03

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