OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 28, Iss. 8 — Aug. 1, 1938
  • pp: 290–292

Optics InfoBase > JOSA > Volume 28 > Issue 8 > An Interval Recorder for Analysis of Spectra

An Interval Recorder for Analysis of Spectra

GEORGE R. HARRISON  »View Author Affiliations


JOSA, Vol. 28, Issue 8, pp. 290-292 (1938)
http://dx.doi.org/10.1364/JOSA.28.000290


View Full Text Article

Acrobat PDF (612 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A device is described which automatically combs a list of wave numbers punched on a paper tape for pairs of lines having constant differences within a given tolerance, and records the wave numbers of these pairs on motion picture film. It supplements the spectrum interval sorter previously described, which makes use of the same punched tape and automatically places all similar intervals in juxtaposition so that frequently recurring intervals can be detected.The interval recorder is set successively for the various intervals which the interval sorter chart shows to be important. When a light beam passes simultaneously through holes in both upper and lower sections of a looped portion of the tape, a detecting photo-cell flashes an argon lamp which momentarily illuminates two wave number dials turning in synchronism with the motion of the tape, and records their readings. By means of a calibrated differential the two dials and the tape can be set for any desired wave number difference. By controlling the width of the scanning beam the tolerance for recording can be set equal to the interval variation which it is desired to include. With the aid of this machine and the interval sorter some 2000 lines in the spectrum of Ce II have been classified in a quadratic array by Albertson and the writer. The average difference between observed and calculated intervals, with wavelength measurements made on the automatic computing comparator described by the writer, is slightly over 0.01 cm-1.

Citation
GEORGE R. HARRISON, "An Interval Recorder for Analysis of Spectra," J. Opt. Soc. Am. 28, 290-292 (1938)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-28-8-290

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited