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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 7, Iss. 9 — Sep. 1, 1990
  • pp: 1779–1791

Constant-dispersion grism spectrometer for channeled spectra

Wesley A. Traub  »View Author Affiliations


JOSA A, Vol. 7, Issue 9, pp. 1779-1791 (1990)
http://dx.doi.org/10.1364/JOSAA.7.001779


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Abstract

A new spectrometer design is presented in which the angular dispersion with respect to wave number is nearly constant. The spectrometer is a type of grism, a series combination of grating and prism, in which the constant parts of the dispersion terms add to one another but the slopes of the dispersions tend to cancel one another. A systematic method is presented for optimizing the grating and prism parameters. Expressions are given for the blaze efficiency and effective groove width of a transmission grating with generalized triangular grooves. A cross-dispersion technique is presented, eliminating overlapping grating orders. A design example is given for the visible region from 0.45 to 0.80 μm with essentially constant wave-number dispersion and a peak transmission of approximately 95%. This grism is well suited for measuring channeled spectra as generated by an optical stellar interferometer.

© 1990 Optical Society of America

History
Original Manuscript: October 31, 1989
Manuscript Accepted: April 12, 1990
Published: September 1, 1990

Citation
Wesley A. Traub, "Constant-dispersion grism spectrometer for channeled spectra," J. Opt. Soc. Am. A 7, 1779-1791 (1990)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-7-9-1779

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