GB1242621A - Improvements in or relating to the detection of dirt or condensation on windows - Google Patents
Improvements in or relating to the detection of dirt or condensation on windowsInfo
- Publication number
- GB1242621A GB1242621A GB1604969A GB1604969A GB1242621A GB 1242621 A GB1242621 A GB 1242621A GB 1604969 A GB1604969 A GB 1604969A GB 1604969 A GB1604969 A GB 1604969A GB 1242621 A GB1242621 A GB 1242621A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condensation
- dirt
- photo
- detected
- cell
- 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
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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/43—Refractivity; Phase-affecting properties, e.g. optical path length by measuring critical angle
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)
Abstract
1,242,621. Detecting dirt or condensation on windows. ELTRO G.m.b.H. & CO. GES. FUR STRAHLUNGSTECHNIK. March 27, 1969 [March 27, 1968], No.16049/69. Heading G1A. The presence of dirt or condensation on a window 1 is detected by the use of two triangular prisms 2, 3 which are cemented on the inside window surface, a light source 4 and a photo-cell 5. With a clean outer surface light entering the glass of the window is totally internally reflected back and forth along the pane until it can emerge only via prism 3 on the inner surface, and is detected by photo-cell 5. The presence of a drop 7 condensed water on the outer surface allows some light to escape and the photo-cell output is therefore slightly diminished. A decreased output caused by condensation or dirt can be detected and used after amplification, to initiate operation of an alarm lamp or other signalling device or control the starting of, for example, a windscreen wiper or washer.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681755074 DE1755074B1 (en) | 1968-03-27 | 1968-03-27 | Display device for soiling and fogging of windows |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1242621A true GB1242621A (en) | 1971-08-11 |
Family
ID=5693303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1604969A Expired GB1242621A (en) | 1968-03-27 | 1969-03-27 | Improvements in or relating to the detection of dirt or condensation on windows |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1755074B1 (en) |
FR (1) | FR2004803A1 (en) |
GB (1) | GB1242621A (en) |
SE (1) | SE353497B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2424156A1 (en) * | 1978-04-25 | 1979-11-23 | Bayerische Motoren Werke Ag | VEHICLE HEADLIGHT EQUIPPED WITH A CLOGGING DETECTOR |
US4652745A (en) * | 1985-12-06 | 1987-03-24 | Ford Motor Company | Optical moisture sensor for a window or windshield |
GB2186077A (en) * | 1986-02-04 | 1987-08-05 | Vaisala Oy | Light transmission measurement equipment compensated for protective glass surfaces contamination |
US4701613A (en) * | 1984-11-09 | 1987-10-20 | Nippondenso Co., Ltd. | Electro-optical rain detector for windshields |
GB2208433A (en) * | 1987-07-31 | 1989-03-30 | Veglia Borletti Srl | Detecting water droplets on a vehicle window and controlling windscreen wiper in response thereto |
GB2360583A (en) * | 2000-03-21 | 2001-09-26 | Microflow Ltd | Optical condensation monitor |
WO2016058105A1 (en) * | 2014-10-17 | 2016-04-21 | Nima Nabavi | Self-cleaning optical sensor assembly |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2833635C2 (en) * | 1978-08-01 | 1983-05-05 | Siemens AG, 1000 Berlin und 8000 München | Method for measuring the contamination of optical interfaces in optical receivers and device for carrying out the method |
DE3232059A1 (en) * | 1981-09-04 | 1983-03-24 | Westinghouse Electric Corp., 15222 Pittsburgh, Pa. | GLASS FIBER DETECTOR |
DE3247659A1 (en) * | 1982-12-23 | 1984-06-28 | Wolfgang Dr. 7000 Stuttgart Ruhrmann | OPTICAL SENSOR |
DE3619538A1 (en) * | 1986-06-10 | 1987-12-17 | Egon Harig Apparatebau Elektro | DEVICE DETECTING ARRANGEMENT |
DE102014220652A1 (en) * | 2014-10-13 | 2016-04-14 | Continental Automotive Gmbh | Vehicle window with a window heating and heating and sensor unit for a vehicle |
AT518591B1 (en) | 2016-05-11 | 2019-04-15 | B & R Ind Automation Gmbh | Illuminant with adjustable irradiance |
-
1968
- 1968-03-27 DE DE19681755074 patent/DE1755074B1/en active Pending
-
1969
- 1969-02-27 SE SE273269A patent/SE353497B/xx unknown
- 1969-03-06 FR FR6906294A patent/FR2004803A1/fr not_active Withdrawn
- 1969-03-27 GB GB1604969A patent/GB1242621A/en not_active Expired
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2424156A1 (en) * | 1978-04-25 | 1979-11-23 | Bayerische Motoren Werke Ag | VEHICLE HEADLIGHT EQUIPPED WITH A CLOGGING DETECTOR |
US4701613A (en) * | 1984-11-09 | 1987-10-20 | Nippondenso Co., Ltd. | Electro-optical rain detector for windshields |
US4652745A (en) * | 1985-12-06 | 1987-03-24 | Ford Motor Company | Optical moisture sensor for a window or windshield |
GB2186077A (en) * | 1986-02-04 | 1987-08-05 | Vaisala Oy | Light transmission measurement equipment compensated for protective glass surfaces contamination |
DE3703180A1 (en) * | 1986-02-04 | 1987-08-06 | Vaisala Oy | METHOD AND DEVICE FOR MEASURING THE LIGHT TRANSMISSION |
US4794266A (en) * | 1986-02-04 | 1988-12-27 | Vaisala Oy | Method and apparatus for light transmission measurement by sending light, measuring received light and computing transmittance |
GB2186077B (en) * | 1986-02-04 | 1989-10-25 | Vaisala Oy | Method and apparatus for measuring light transmission |
GB2208433A (en) * | 1987-07-31 | 1989-03-30 | Veglia Borletti Srl | Detecting water droplets on a vehicle window and controlling windscreen wiper in response thereto |
GB2360583A (en) * | 2000-03-21 | 2001-09-26 | Microflow Ltd | Optical condensation monitor |
WO2016058105A1 (en) * | 2014-10-17 | 2016-04-21 | Nima Nabavi | Self-cleaning optical sensor assembly |
US10632507B2 (en) | 2014-10-17 | 2020-04-28 | Excelsense Technologies Corp. | Self-cleaning optical sensor assembly |
US11173524B2 (en) | 2014-10-17 | 2021-11-16 | Excelsense Technologies Corp. | Self-cleaning optical sensor assembly |
Also Published As
Publication number | Publication date |
---|---|
DE1755074B1 (en) | 1970-09-10 |
SE353497B (en) | 1973-02-05 |
FR2004803A1 (en) | 1969-12-05 |
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