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Title: Immersion echelle spectrograph

Abstract

A small spectrograph containing no moving components and capable of providing high resolution spectra of the mid-infrared region from 2 microns to 4 microns in wavelength. The resolving power of the spectrograph exceeds 20,000 throughout this region and at an optical throughput of about 10.sup.-5 cm.sup.2 sr. The spectrograph incorporates a silicon immersion echelle grating operating in high spectral order combined with a first order transmission grating in a cross-dispersing configuration to provide a two-dimensional (2-D) spectral format that is focused onto a two-dimensional infrared detector array. The spectrometer incorporates a common collimating and condensing lens assembly in a near aberration-free axially symmetric design. The spectrometer has wide use potential in addition to general research, such as monitoring atmospheric constituents for air quality, climate change, global warming, as well as monitoring exhaust fumes for smog sources or exhaust plumes for evidence of illicit drug manufacture.

Inventors:
 [1];  [2]
  1. (Danville, CA)
  2. (Livermore, CA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873047
Patent Number(s):
US 6078048
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
immersion; echelle; spectrograph; containing; moving; components; capable; providing; resolution; spectra; mid-infrared; region; microns; wavelength; resolving; power; exceeds; 20; 000; throughout; optical; throughput; 10; -5; cm; sr; incorporates; silicon; grating; operating; spectral; combined; transmission; cross-dispersing; configuration; provide; two-dimensional; 2-d; format; focused; infrared; detector; array; spectrometer; common; collimating; condensing; lens; assembly; near; aberration-free; axially; symmetric; design; wide; potential; addition; monitoring; atmospheric; constituents; air; quality; climate; change; global; warming; exhaust; fumes; smog; sources; plumes; evidence; illicit; drug; manufacture; infrared detector; lens assembly; detector array; axially symmetric; air quality; transmission grating; resolving power; monitoring exhaust; infrared region; exhaust plumes; exhaust plume; moving components; /250/356/

Citation Formats

Stevens, Charles G., and Thomas, Norman L. Immersion echelle spectrograph. United States: N. p., 2000. Web.
Stevens, Charles G., & Thomas, Norman L. Immersion echelle spectrograph. United States.
Stevens, Charles G., and Thomas, Norman L. Sat . "Immersion echelle spectrograph". United States. https://www.osti.gov/servlets/purl/873047.
@article{osti_873047,
title = {Immersion echelle spectrograph},
author = {Stevens, Charles G. and Thomas, Norman L.},
abstractNote = {A small spectrograph containing no moving components and capable of providing high resolution spectra of the mid-infrared region from 2 microns to 4 microns in wavelength. The resolving power of the spectrograph exceeds 20,000 throughout this region and at an optical throughput of about 10.sup.-5 cm.sup.2 sr. The spectrograph incorporates a silicon immersion echelle grating operating in high spectral order combined with a first order transmission grating in a cross-dispersing configuration to provide a two-dimensional (2-D) spectral format that is focused onto a two-dimensional infrared detector array. The spectrometer incorporates a common collimating and condensing lens assembly in a near aberration-free axially symmetric design. The spectrometer has wide use potential in addition to general research, such as monitoring atmospheric constituents for air quality, climate change, global warming, as well as monitoring exhaust fumes for smog sources or exhaust plumes for evidence of illicit drug manufacture.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}

Patent:

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