OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 44, Iss. 9 — Sep. 1, 1954
  • pp: 679–683

Simple Device for Reducing Microphotometer Traces to Curves of Intensity

J. D. PURCELL  »View Author Affiliations


JOSA, Vol. 44, Issue 9, pp. 679-683 (1954)
http://dx.doi.org/10.1364/JOSA.44.000679


View Full Text Article

Acrobat PDF (749 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

A mechanical device is described that performs automatically the laborious task of reducing a microphotometer spectrum trace to a spectral intensity curve. In performing the conversion the microphotometer trace, divided into sections, is contact printed onto sensitized material using a narrow slit light source and moving the trace and photographic material at different rates of speed past the slit. The slit is parallel to the wavelength axis and, in effect, scans along the density axis. The photographic material moves at constant speed, while the motion of the trace is controlled by a cam whose shape is essentially the photographic characteristic curve. The density curve is converted to a curve of log intensity in one step, and a second step is used to convert to linear intensity. Other uses of the device are suggested.

Citation
J. D. PURCELL, "Simple Device for Reducing Microphotometer Traces to Curves of Intensity," J. Opt. Soc. Am. 44, 679-683 (1954)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-44-9-679


Sort:  Author  |  Journal  |  Reset

References

  1. C. S. Beals, J. Roy. Astron. Soc. Can. 38, 65 (1944).
  2. Weissler, Einarsson, and McClelland, Rev. Sci. Instr. 23, 209 (1952).
  3. R. C. Williams and A. Hiltner, Publ. Am. Astron. Soc. 10, 33 (1939).
  4. M. Minnaert and J. Houtgast, Z. Astrophys. 15, 354 (1938).
  5. W. N. Brown and W. B. Birtley, Rev. Sci. Instr. 22, 67 (1951).
  6. Wilson, Tousey, Purcell, Johnson, and Moore, Astrophys. J. 119, 590 (1954).
  7. Johnson, Purcell, and Tousey, J. Geophys. Research 56, 583 (1951).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited