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Title: Single-fiber multi-color pyrometry

Abstract

This invention is a fiber-based multi-color pyrometry set-up for real-time non-contact temperature and emissivity measurement. The system includes a single optical fiber to collect radiation emitted by a target, a reflective rotating chopper to split the collected radiation into two or more paths while modulating the radiation for lock-in amplification (i.e., phase-sensitive detection), at least two detectors possibly of different spectral bandwidths with or without filters to limit the wavelength regions detected and optics to direct and focus the radiation onto the sensitive areas of the detectors. A computer algorithm is used to calculate the true temperature and emissivity of a target based on blackbody calibrations. The system components are enclosed in a light-tight housing, with provision for the fiber to extend outside to collect the radiation. Radiation emitted by the target is transmitted through the fiber to the reflective chopper, which either allows the radiation to pass straight through or reflects the radiation into one or more separate paths. Each path includes a detector with or without filters and corresponding optics to direct and focus the radiation onto the active area of the detector. The signals are recovered using lock-in amplification. Calibration formulas for the signals obtained using amore » blackbody of known temperature are used to compute the true temperature and emissivity of the target. The temperature range of the pyrometer system is determined by the spectral characteristics of the optical components.

Inventors:
;
Issue Date:
Research Org.:
The Regents Of University Of California, Oakland, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174698
Patent Number(s):
6682216
Application Number:
09/465,979
Assignee:
University Of California, The Regents Of
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
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Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Small, IV, Ward, and Celliers, Peter. Single-fiber multi-color pyrometry. United States: N. p., 2004. Web.
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Small, IV, Ward, & Celliers, Peter. Single-fiber multi-color pyrometry. United States.
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Small, IV, Ward, and Celliers, Peter. Tue . "Single-fiber multi-color pyrometry". United States. https://www.osti.gov/servlets/purl/1174698.
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@article{osti_1174698,
title = {Single-fiber multi-color pyrometry},
author = {Small, IV, Ward and Celliers, Peter},
abstractNote = {This invention is a fiber-based multi-color pyrometry set-up for real-time non-contact temperature and emissivity measurement. The system includes a single optical fiber to collect radiation emitted by a target, a reflective rotating chopper to split the collected radiation into two or more paths while modulating the radiation for lock-in amplification (i.e., phase-sensitive detection), at least two detectors possibly of different spectral bandwidths with or without filters to limit the wavelength regions detected and optics to direct and focus the radiation onto the sensitive areas of the detectors. A computer algorithm is used to calculate the true temperature and emissivity of a target based on blackbody calibrations. The system components are enclosed in a light-tight housing, with provision for the fiber to extend outside to collect the radiation. Radiation emitted by the target is transmitted through the fiber to the reflective chopper, which either allows the radiation to pass straight through or reflects the radiation into one or more separate paths. Each path includes a detector with or without filters and corresponding optics to direct and focus the radiation onto the active area of the detector. The signals are recovered using lock-in amplification. Calibration formulas for the signals obtained using a blackbody of known temperature are used to compute the true temperature and emissivity of the target. The temperature range of the pyrometer system is determined by the spectral characteristics of the optical components.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {1}
}
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Works referenced in this record:

Emissivity correcting pyrometer for temperature measurement in low pressure chemical vapor deposition
conference, January 1993

  • Fordham, M. J.; Gansman, R. F.; Sorrell, F. Y.
  • [1993] Tenth Biennial University/Government/Industry Microelectronics Symposium, [1993] Proceedings of the Tenth Biennial University/Government/Industry Microelectronics Symposium
  • https://doi.org/10.1109/UGIM.1993.297057

Temperature measurements utilizing two-bandpass fiber optic radiometry
journal, February 1995

Dual-wavelength fiber optic temperature sensor
conference, March 1994

Two-Color Imaging Radiometry For Pyrotechnic Diagnostics
conference, May 1987

Estimation of ambient radiation temperature for emissivity-corrected thermography
conference, January 2001

  • Otsuka, K.; Okada S., S.; Togawa, T.
  • 2001 23rd Annual International Conference of the IEEE Engineering n Medicine and Biology Society, 2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society
  • https://doi.org/10.1109/IEMBS.2001.1019499

A double-wedge reflector for emissivity enhanced pyrometry
journal, September 1990

Substrate temperature measurement and control by emissivity compensated pyrometry during metalorganic vapor phase epitaxy of III-V device structures in large scale rotating disc reactors
conference, January 2000

  • Ramer, J. C.; Patel, B.; Boguslavskiy, V.
  • 2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497)
  • https://doi.org/10.1109/LEOSST.2000.869727

Temperature measurements using pulsed photothermal radiometry and silver halide infrared optical fibers
journal, March 1997

Laser tissue welding mediated with a protein solder
conference, May 1996

Model-based emissivity correction in pyrometer temperature control of rapid thermal processing systems
journal, January 1993

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