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Title: Backscatter absorption gas imaging system

Abstract

A video imaging system for detecting hazardous gas leaks. Visual displays of invisible gas clouds are produced by radiation augmentation of the field of view of an imaging device by radiation corresponding to an absorption line of the gas to be detected. The field of view of an imager is irradiated by a laser. The imager receives both backscattered laser light and background radiation. When a detectable gas is present, the backscattered laser light is highly attenuated, producing a region of contrast or shadow on the image. A flying spot imaging system is utilized to synchronously irradiate and scan the area to lower laser power requirements. The imager signal is processed to produce a video display.

Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
OSTI Identifier:
865686
Patent Number(s):
4555627
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01M - TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
backscatter; absorption; gas; imaging; video; detecting; hazardous; leaks; visual; displays; invisible; clouds; produced; radiation; augmentation; field; view; device; corresponding; line; detected; imager; irradiated; laser; receives; backscattered; light; background; detectable; highly; attenuated; producing; region; contrast; shadow; image; flying; spot; utilized; synchronously; irradiate; scan; power; requirements; signal; processed; produce; display; visual display; power requirements; background radiation; imaging device; laser light; absorption line; laser power; video display; radiation corresponding; gas leak; gas leaks; power requirement; /250/

Citation Formats

McRae, Jr., Thomas G. Backscatter absorption gas imaging system. United States: N. p., 1985. Web.
McRae, Jr., Thomas G. Backscatter absorption gas imaging system. United States.
McRae, Jr., Thomas G. Tue . "Backscatter absorption gas imaging system". United States. https://www.osti.gov/servlets/purl/865686.
@article{osti_865686,
title = {Backscatter absorption gas imaging system},
author = {McRae, Jr., Thomas G.},
abstractNote = {A video imaging system for detecting hazardous gas leaks. Visual displays of invisible gas clouds are produced by radiation augmentation of the field of view of an imaging device by radiation corresponding to an absorption line of the gas to be detected. The field of view of an imager is irradiated by a laser. The imager receives both backscattered laser light and background radiation. When a detectable gas is present, the backscattered laser light is highly attenuated, producing a region of contrast or shadow on the image. A flying spot imaging system is utilized to synchronously irradiate and scan the area to lower laser power requirements. The imager signal is processed to produce a video display.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}