GB1514977A - Detecting oil in water - Google Patents

Detecting oil in water

Info

Publication number
GB1514977A
GB1514977A GB4940775A GB4940775A GB1514977A GB 1514977 A GB1514977 A GB 1514977A GB 4940775 A GB4940775 A GB 4940775A GB 4940775 A GB4940775 A GB 4940775A GB 1514977 A GB1514977 A GB 1514977A
Authority
GB
United Kingdom
Prior art keywords
prism
water
light
oil
silica
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
GB4940775A
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 GB4940775A priority Critical patent/GB1514977A/en
Publication of GB1514977A publication Critical patent/GB1514977A/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
    • G01N21/17—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
    • G01N21/431—Dip refractometers, e.g. using optical fibres

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

1514977 Detecting oil in water STANDARD TELEPHONES & CABLES Ltd 2 Dec 1975 49407/75 Heading G1A The presence of oil in water is detected, and its concentration measured by monitoring the amount of light emerging from a transparent silica prism having one or more surfaces in contact with the water. The prism may have various shapes, in those of Figs. 1 and 2, the input and output beams passing through the same end of the prism. The prism of Fig. 3 has a square or rectangular cross-section. The material chosen for the prism is silica having a refractive index similar to that of oil such that when this is present, light leaks out from the prism, being internally reflected to lesser degree than with pure water. The source of light is a monochromatic gallium arsenide or gallium aluminium arsenide laser; the detector a silicon PIN diode. Optical fibres lead light to and from the prism.
GB4940775A 1975-12-02 1975-12-02 Detecting oil in water Expired GB1514977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4940775A GB1514977A (en) 1975-12-02 1975-12-02 Detecting oil in water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4940775A GB1514977A (en) 1975-12-02 1975-12-02 Detecting oil in water

Publications (1)

Publication Number Publication Date
GB1514977A true GB1514977A (en) 1978-06-21

Family

ID=10452239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4940775A Expired GB1514977A (en) 1975-12-02 1975-12-02 Detecting oil in water

Country Status (1)

Country Link
GB (1) GB1514977A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009493A1 (en) * 1987-05-29 1988-12-01 Godfrey Howden Proprietary Limited Liquid testing apparatus
GB2223841A (en) * 1988-08-31 1990-04-18 Red Kite Tech Parameter measurement using refractive index change
US5167149A (en) * 1990-08-28 1992-12-01 Schlumberger Technology Corporation Apparatus and method for detecting the presence of gas in a borehole flow stream
US5201220A (en) * 1990-08-28 1993-04-13 Schlumberger Technology Corp. Apparatus and method for detecting the presence of gas in a borehole flow stream
US5245860A (en) * 1991-09-09 1993-09-21 Intevep, S.A. Sensor for detection of oil leaks and oil quality in stuffing box of walking beam pump system
EP3692401A4 (en) * 2017-11-21 2020-11-18 Lumus Ltd. Optical aperture expansion arrangement for near-eye displays
US11125927B2 (en) 2017-03-22 2021-09-21 Lumus Ltd. Overlapping facets
US11194084B2 (en) 2017-02-22 2021-12-07 Lumus Ltd. Light guide optical assembly
US11378791B2 (en) 2016-11-08 2022-07-05 Lumus Ltd. Light-guide device with optical cutoff edge and corresponding production methods
US11415812B2 (en) 2018-06-26 2022-08-16 Lumus Ltd. Compact collimating optical device and system
US11523092B2 (en) 2019-12-08 2022-12-06 Lumus Ltd. Optical systems with compact image projector
US11531201B2 (en) 2015-02-19 2022-12-20 Lumus Ltd. Compact head-mounted display system having uniform image
US11543661B2 (en) 2014-11-11 2023-01-03 Lumus Ltd. Compact head-mounted display system protected by a hyperfine structure
US11561335B2 (en) 2019-12-05 2023-01-24 Lumus Ltd. Light-guide optical element employing complementary coated partial reflectors, and light-guide optical element having reduced light scattering
US11567316B2 (en) 2016-10-09 2023-01-31 Lumus Ltd. Aperture multiplier with depolarizer
US11849262B2 (en) 2019-03-12 2023-12-19 Lumus Ltd. Image projector
US11914187B2 (en) 2019-07-04 2024-02-27 Lumus Ltd. Image waveguide with symmetric beam multiplication

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009493A1 (en) * 1987-05-29 1988-12-01 Godfrey Howden Proprietary Limited Liquid testing apparatus
US4918979A (en) * 1987-05-29 1990-04-24 Godfrey Howden Pty. Ltd. Liquid testing apparatus
GB2223841A (en) * 1988-08-31 1990-04-18 Red Kite Tech Parameter measurement using refractive index change
US5167149A (en) * 1990-08-28 1992-12-01 Schlumberger Technology Corporation Apparatus and method for detecting the presence of gas in a borehole flow stream
US5201220A (en) * 1990-08-28 1993-04-13 Schlumberger Technology Corp. Apparatus and method for detecting the presence of gas in a borehole flow stream
US5245860A (en) * 1991-09-09 1993-09-21 Intevep, S.A. Sensor for detection of oil leaks and oil quality in stuffing box of walking beam pump system
US11543661B2 (en) 2014-11-11 2023-01-03 Lumus Ltd. Compact head-mounted display system protected by a hyperfine structure
US11531201B2 (en) 2015-02-19 2022-12-20 Lumus Ltd. Compact head-mounted display system having uniform image
US11567316B2 (en) 2016-10-09 2023-01-31 Lumus Ltd. Aperture multiplier with depolarizer
US11378791B2 (en) 2016-11-08 2022-07-05 Lumus Ltd. Light-guide device with optical cutoff edge and corresponding production methods
US11194084B2 (en) 2017-02-22 2021-12-07 Lumus Ltd. Light guide optical assembly
US11125927B2 (en) 2017-03-22 2021-09-21 Lumus Ltd. Overlapping facets
EP3692401A4 (en) * 2017-11-21 2020-11-18 Lumus Ltd. Optical aperture expansion arrangement for near-eye displays
US11415812B2 (en) 2018-06-26 2022-08-16 Lumus Ltd. Compact collimating optical device and system
US11849262B2 (en) 2019-03-12 2023-12-19 Lumus Ltd. Image projector
US11914187B2 (en) 2019-07-04 2024-02-27 Lumus Ltd. Image waveguide with symmetric beam multiplication
US11561335B2 (en) 2019-12-05 2023-01-24 Lumus Ltd. Light-guide optical element employing complementary coated partial reflectors, and light-guide optical element having reduced light scattering
US11523092B2 (en) 2019-12-08 2022-12-06 Lumus Ltd. Optical systems with compact image projector

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee