Pulsed laser linescanner for a backscatter absorption gas imaging system

Kulp, Thomas J.; Reichardt, Thomas A.; Schmitt, Randal L.; Bambha, Ray P.

Title: Pulsed laser linescanner for a backscatter absorption gas imaging system

Full Record
Other Related Research

Abstract

An active (laser-illuminated) imaging system is described that is suitable for use in backscatter absorption gas imaging (BAGI). A BAGI imager operates by imaging a scene as it is illuminated with radiation that is absorbed by the gas to be detected. Gases become "visible" in the image when they attenuate the illumination creating a shadow in the image. This disclosure describes a BAGI imager that operates in a linescanned manner using a high repetition rate pulsed laser as its illumination source. The format of this system allows differential imaging, in which the scene is illuminated with light at least 2 wavelengths--one or more absorbed by the gas and one or more not absorbed. The system is designed to accomplish imaging in a manner that is insensitive to motion of the camera, so that it can be held in the hand of an operator or operated from a moving vehicle.

Inventors:: Kulp, Thomas J.; Reichardt, Thomas A.; Schmitt, Randal L.; Bambha, Ray P.

Publication Date:: Tue Feb 10 00:00:00 EST 2004

Research Org.:: Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1174725

Patent Number(s):: 6,690,472

Application Number:: 09/965,527

Assignee:: Sandia National Laboratories (Livermore, CA)

DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION

Citation Formats


                    Kulp, Thomas J., Reichardt, Thomas A., Schmitt, Randal L., and Bambha, Ray P. Pulsed laser linescanner for a backscatter absorption gas imaging system.  United States: N. p., 2004. 
        Web.

Copy to clipboard


                    Kulp, Thomas J., Reichardt, Thomas A., Schmitt, Randal L., & Bambha, Ray P. Pulsed laser linescanner for a backscatter absorption gas imaging system.  United States.

Copy to clipboard


                    Kulp, Thomas J., Reichardt, Thomas A., Schmitt, Randal L., and Bambha, Ray P. 2004.  
        "Pulsed laser linescanner for a backscatter absorption gas imaging system".  United States.  https://www.osti.gov/servlets/purl/1174725.

Copy to clipboard


                    
@article{osti_1174725,

  title        = {Pulsed laser linescanner for a backscatter absorption gas imaging system},

  author       = {Kulp, Thomas J. and Reichardt, Thomas A. and Schmitt, Randal L. and Bambha, Ray P.},

  abstractNote = {An active (laser-illuminated) imaging system is described that is suitable for use in backscatter absorption gas imaging (BAGI). A BAGI imager operates by imaging a scene as it is illuminated with radiation that is absorbed by the gas to be detected. Gases become "visible" in the image when they attenuate the illumination creating a shadow in the image. This disclosure describes a BAGI imager that operates in a linescanned manner using a high repetition rate pulsed laser as its illumination source. The format of this system allows differential imaging, in which the scene is illuminated with light at least 2 wavelengths--one or more absorbed by the gas and one or more not absorbed. The system is designed to accomplish imaging in a manner that is insensitive to motion of the camera, so that it can be held in the hand of an operator or operated from a moving vehicle.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1174725},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Feb 10 00:00:00 EST 2004},

  month        = {Tue Feb 10 00:00:00 EST 2004}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

The development of a pulsed laser imaging system for natural gas leak detection

Conference Kulp, T

The detection of gas leaks represents a critical operation performed regularly by the gas industry to maintain the integrity and safety of its vast network of piping, both above and below the ground. We are developing a technology that allows the real-time imaging of gas plumes in a television format. Termed backscatter absorption gas imaging (BAGI), the technique operates by illuminating a scene with infrared laser radiation having a wavelength that is absorbed by the gas to be detected (in this case, methane). Backscattered laser radiation is used to create a video image of the scene. If a leak ofmore »« less
Full Text Available
The development and testing of a backscatter absorption gas imaging (BAGI) system designed to image at a range of 300 m

Conference Kulp, T; Kennedy, R; Delong, M; ...

The backscatter absorption gas imaging (BAGI) technique is a laser remote sensing method that fuses the chemical detection attributes of chemical lidar with the visualization capability of imaging laser radar (ladar) to allow real-time television images of invisible gas plumes to be made. The BAGI technique is carried out by actively imaging a scene with radiation having a wavelength absorbed by the gas to be visualized. Gas plumes present in the scene become visible in the image when they attenuate a portion of the backscattered radiation. Currently, all BAGI instruments that have been developed operate in the infrared (IR) andmore »« less
Full Text Available
Demonstration of differential backscatter absorption gas imaging

Journal Article Powers, Peter; Kulp, Thomas; Kennedy, Randall - Applied Optics

Backscatter absorption gas imaging (BAGI) is a technique that uses infrared active imaging to generate real-time video imagery of gas plumes. We describe a method that employs imaging at two wavelengths (absorbed and not absorbed by the gas to be detected) to allow wavelength-differential BAGI. From the frames collected at each wavelength, an absorbance image is created that displays the differential absorbance of the atmosphere between the imager and the backscatter surface. This is analogous to a two-dimensional topographic differential absorption lidar or differential optical absorption spectroscopy measurement. Gas plumes are displayed, but the topographic scene image is removed. Thismore »« less
https://doi.org/10.1364/AO.39.001440
Development of a pulsed backscatter-absorption gas-imaging system and its application to the visualization of natural gas leaks

Journal Article Kulp, T; Powers, P; Kennedy, R; ... - Applied Optics

The design and evaluation of a backscatter-absorption gas-imaging sensor that operates in a pulsed mode is described. It is capable of video visualization of natural gas leaks. Its development was motivated by the need for a methane imaging system to operate at ranges and sensitivities useful to the natural gas industry. The imager employs pulsed laser illumination at a repetition rate of 30 Hz and an average power of {approximately}150 mW to image gas at standoff ranges of as long as 100 m, using a backscatter target with a reflectivity of 0.016 sr{sup {minus}1}. This is a tenfold improvement overmore »« less
https://doi.org/10.1364/AO.37.003912
Backscatter absorption gas imaging: a new technique for gas visualization

Journal Article McRae, T; Kulp, T - Applied Optics; (United States)

This paper presents a new laser-based method of gas detection that permits real-time television images of gases to be produced. The principle of this technique [which is called backscatter absorption gas imaging (BAGI)] and the operation of two instruments used to implement it are described. These instruments use 5-W and 20-W CO[sub 2] lasers to achieve gas imaging at ranges of approximately 30 and 125 m, respectively. Derivations of relevant BAGI signal equations that can be used to predict the performance of a gas imager are provided. The predictions of this model and the measured range performance of an extended-rangemore »« less
https://doi.org/10.1364/AO.32.004037

Similar Records