GB1395113A - Detecting obscuring matter on transparent screens - Google Patents

Detecting obscuring matter on transparent screens

Info

Publication number
GB1395113A
GB1395113A GB1291073A GB1291073A GB1395113A GB 1395113 A GB1395113 A GB 1395113A GB 1291073 A GB1291073 A GB 1291073A GB 1291073 A GB1291073 A GB 1291073A GB 1395113 A GB1395113 A GB 1395113A
Authority
GB
United Kingdom
Prior art keywords
detecting
glass
obscuring matter
light
screen
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
GB1291073A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1291073A priority Critical patent/GB1395113A/en
Publication of GB1395113A publication Critical patent/GB1395113A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1395113 Photo-electric detection systems STANDARD TELEPHONES & CABLES Ltd 16 March 1973 12910/73 Heading G1A Apparatus for detecting obscuring matter, e.g. dirt, condensation, on a lamp glass or windscreen of a vehicle, comprises means for directing a modulated optical or infrared beam on to the screen or glass and means for detecting correspondingly modulated radiation back-scattered from the screen by obscuring matter, thereby to eliminate spurious signals, warning device and/or a cleaning apparatus being operated when such backscattered radiation is detected. As shown a light-emitting diode 1, a photodetector 6 and a control circuit 7 are provided. Several screens may be monitored using a single source and a system of light guides. A further embodiment utilizes the effective change in total internal reflection caused by back-scattering resulting from contamination. In this mode light is directed into the edge of the glass.
GB1291073A 1973-03-16 1973-03-16 Detecting obscuring matter on transparent screens Expired GB1395113A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1291073A GB1395113A (en) 1973-03-16 1973-03-16 Detecting obscuring matter on transparent screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1291073A GB1395113A (en) 1973-03-16 1973-03-16 Detecting obscuring matter on transparent screens

Publications (1)

Publication Number Publication Date
GB1395113A true GB1395113A (en) 1975-05-21

Family

ID=10013378

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1291073A Expired GB1395113A (en) 1973-03-16 1973-03-16 Detecting obscuring matter on transparent screens

Country Status (1)

Country Link
GB (1) GB1395113A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466767A1 (en) * 1979-08-10 1981-04-10 Bosch Gmbh Robert METHOD FOR TESTING THE QUALITY OF THE ASSEMBLY CONSISTING OF A WIPER BLADE AND THE SURFACE OF THE ICE
EP0066370A1 (en) * 1981-06-02 1982-12-08 Santa Barbara Research Center Reference channel for sensing optical contamination
GB2127540A (en) * 1982-09-22 1984-04-11 Unicell Ltd Condensation prevention apparatus
US4560874A (en) * 1981-06-02 1985-12-24 Santa Barbara Research Center Reference channel for sensing optical contamination
US4605302A (en) * 1983-04-18 1986-08-12 Asea Aktiebolag Cloud height measuring device with compensation for window fouling
EP0249031A2 (en) * 1986-06-07 1987-12-16 Robert Bosch Gmbh Device for the optical detection of foreign matter
FR2672124A1 (en) * 1991-01-25 1992-07-31 Thomson Csf METHOD AND DEVICE FOR CONTROLLING THE SURFACE CONDITION OF AN OPTICAL LIGHT TRANSMISSION ELEMENT
FR2773614A1 (en) * 1998-01-14 1999-07-16 Intertechnique Sa Device for detection of mist formation on a smooth surface such as a window
WO2010139313A1 (en) * 2009-06-02 2010-12-09 Osram Opto Semiconductors Gmbh Measuring device, measuring system and method for measuring the contamination of a translucent measurement object
EP2538393A1 (en) 2011-06-24 2012-12-26 Tomra Systems ASA Reverse vending machine and method of detecting dirt in a reverse vending machine
CN110849895A (en) * 2019-11-21 2020-02-28 大连大学 Dust accumulation detection and cleaning reminding system and method for automobile windshield
PL441607A1 (en) * 2022-06-30 2024-01-03 Politechnika Gdańska System for monitoring the level of contaminants accumulated on glass surfaces, especially photovoltaic modules

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466767A1 (en) * 1979-08-10 1981-04-10 Bosch Gmbh Robert METHOD FOR TESTING THE QUALITY OF THE ASSEMBLY CONSISTING OF A WIPER BLADE AND THE SURFACE OF THE ICE
EP0066370A1 (en) * 1981-06-02 1982-12-08 Santa Barbara Research Center Reference channel for sensing optical contamination
US4560874A (en) * 1981-06-02 1985-12-24 Santa Barbara Research Center Reference channel for sensing optical contamination
GB2127540A (en) * 1982-09-22 1984-04-11 Unicell Ltd Condensation prevention apparatus
US4605852A (en) * 1982-09-22 1986-08-12 Unicell Limited Condensation prevention apparatus
US4605302A (en) * 1983-04-18 1986-08-12 Asea Aktiebolag Cloud height measuring device with compensation for window fouling
EP0249031A2 (en) * 1986-06-07 1987-12-16 Robert Bosch Gmbh Device for the optical detection of foreign matter
EP0249031A3 (en) * 1986-06-07 1989-11-02 Robert Bosch Gmbh Device for the optical detection of foreign matter
FR2672124A1 (en) * 1991-01-25 1992-07-31 Thomson Csf METHOD AND DEVICE FOR CONTROLLING THE SURFACE CONDITION OF AN OPTICAL LIGHT TRANSMISSION ELEMENT
EP0497649A1 (en) * 1991-01-25 1992-08-05 Thomson-Csf Method and device for testing the surface condition of a light transmitting optical element
FR2773614A1 (en) * 1998-01-14 1999-07-16 Intertechnique Sa Device for detection of mist formation on a smooth surface such as a window
WO2010139313A1 (en) * 2009-06-02 2010-12-09 Osram Opto Semiconductors Gmbh Measuring device, measuring system and method for measuring the contamination of a translucent measurement object
EP2538393A1 (en) 2011-06-24 2012-12-26 Tomra Systems ASA Reverse vending machine and method of detecting dirt in a reverse vending machine
WO2012177146A1 (en) 2011-06-24 2012-12-27 Tomra Systems Asa Reverse vending machine and method of detecting dirt in a reverse vending machine
US9785868B2 (en) 2011-06-24 2017-10-10 Tomra Systems Asa Reverse vending machine and method of detecting dirt in a reverse vending machine
CN110849895A (en) * 2019-11-21 2020-02-28 大连大学 Dust accumulation detection and cleaning reminding system and method for automobile windshield
PL441607A1 (en) * 2022-06-30 2024-01-03 Politechnika Gdańska System for monitoring the level of contaminants accumulated on glass surfaces, especially photovoltaic modules

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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