GB1073562A - Improvements in or relating to optical visibility measuring devices - Google Patents

Improvements in or relating to optical visibility measuring devices

Info

Publication number
GB1073562A
GB1073562A GB5074262A GB5074262A GB1073562A GB 1073562 A GB1073562 A GB 1073562A GB 5074262 A GB5074262 A GB 5074262A GB 5074262 A GB5074262 A GB 5074262A GB 1073562 A GB1073562 A GB 1073562A
Authority
GB
United Kingdom
Prior art keywords
receiver
reflector
source
visibility
measuring
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
GB5074262A
Inventor
Arthur Edward Brewster
George Ian Turner
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 GB5074262A priority Critical patent/GB1073562A/en
Publication of GB1073562A publication Critical patent/GB1073562A/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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/538—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke for determining atmospheric attenuation and visibility

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)
  • Burglar Alarm Systems (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

1, 073, 562. Measuring visibility. STANDARD TELEPHONES & CABLES Ltd. Nov. 30, 1965, No. 50742/65. Heading G1A. [Also in Division G2] In a visibility measuring arrangement the electrical signal produced by a receiver in response to the receipt of light from a pulsed source is maintained constant by using it to adjust the pulse width of the transmitted light and the pulse width is used as a measure of the visibility which may be displayed recorded and/or transmitted. The receiver signal is integrated so that the mean signal value may be compared with a reference value. The path between the transmitter and receiver may be direct or may be folded by a cubical or tetrahedral corner reflector so that the source and receiver may be at the same location, the source comprising a gallium arsenide diode emitting infrared backed by a concave silvered glass reflector. The use of a single source and detector in conjunction with a number of reflecting devices in different directions is described with reference to Fig. 5 (not shown) and the use of a number of source/ detector units with a common reflector is described with reference to Fig. 6 (not shown). The arrangement is caused to operate an alarm in the absence of received light, and the measuring of slant visibility is discussed. Alternative refracting or reflecting devices may be used instead of a corner reflector. The reflector used may be an active reflector which codes the returned signal in a manner to which the receiver is only responsive.
GB5074262A 1965-11-30 1965-11-30 Improvements in or relating to optical visibility measuring devices Expired GB1073562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5074262A GB1073562A (en) 1965-11-30 1965-11-30 Improvements in or relating to optical visibility measuring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5074262A GB1073562A (en) 1965-11-30 1965-11-30 Improvements in or relating to optical visibility measuring devices

Publications (1)

Publication Number Publication Date
GB1073562A true GB1073562A (en) 1967-06-28

Family

ID=10457162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5074262A Expired GB1073562A (en) 1965-11-30 1965-11-30 Improvements in or relating to optical visibility measuring devices

Country Status (1)

Country Link
GB (1) GB1073562A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112055446A (en) * 2019-05-20 2020-12-08 光宝电子(广州)有限公司 Visibility meter, visibility measuring method, street lamp device and operation method thereof
CN113324935A (en) * 2021-06-03 2021-08-31 武汉致腾科技有限公司 Road fog detection device based on multiple spectra and detection method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112055446A (en) * 2019-05-20 2020-12-08 光宝电子(广州)有限公司 Visibility meter, visibility measuring method, street lamp device and operation method thereof
CN112055446B (en) * 2019-05-20 2023-04-07 光宝电子(广州)有限公司 Visibility meter, visibility measuring method, street lamp device and operation method thereof
CN113324935A (en) * 2021-06-03 2021-08-31 武汉致腾科技有限公司 Road fog detection device based on multiple spectra and detection method thereof

Similar Documents

Publication Publication Date Title
GB1184355A (en) Device for gunnery target practice by lase beams
GB1126189A (en) Binoculars for communication systems
ATE86728T1 (en) DETECTION DEVICE.
AU528534B2 (en) Smoke detector
GB1433819A (en) Systems for the surveillance of a route
GB1073562A (en) Improvements in or relating to optical visibility measuring devices
GB973466A (en) Device for detecting the position of a reflecting surface
SE7404670L (en) SIGHT SATURATION DEVICE.
GB1214148A (en) Device for detecting variations in the surface reflectance of objects
GB1471332A (en) Light controlled circuit
GB1334544A (en) Switching device
GB1260901A (en) A device for measuring the duration of short light pulses, such as laser pulses
SE309684B (en)
GB1062951A (en) Pulse communication system
GB1147083A (en) Protection against laser radiation in an optical instrument
GB1408459A (en) Apparatus for producing a beam of light moving parallel to itself
FR92558E (en) Astatic optical device for transmitting an electrical signal
GB970148A (en) Improvements in and relating to photoelectric dew or frost detectors
GB941406A (en) Improvements in or relating to photo-electric tracking devices
FR1521175A (en) Maser or laser device
GB1320468A (en) Range-finders
CLEMESHA The laser radar above 30 kilometers(Optical radar observations above 30 km)
GB907582A (en) Improvements in or relating to measuring and indicating instruments
CHASLAIN et al. Reception of time signals on kilometer waves. II(Timekeeping unit calibration, on basis of signals emitted by HBG transmitter, permitting measurement of state and performance of quartz oscillators)
CA732859A (en) Horizon sensor with reflective optics