OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 29, Iss. 12 — Dec. 1, 1939
  • pp: 535–537

A Push-Pull Photoelectric Photodensitometer for Determining Fine Structure in Ultraviolet Absorption Spectra

JOHN R. LOOFBOUROW  »View Author Affiliations


JOSA, Vol. 29, Issue 12, pp. 535-537 (1939)
http://dx.doi.org/10.1364/JOSA.29.000535


View Full Text Article

Acrobat PDF (289 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The photoelectric photodensitometer described was developed for determinging fine structure from “match-point” spectrum photographs. It consists of a push-pull photo-cell circuit, transfomercoupled to an amplifier and cathode-ray oscillograph, and two optical systems with a.c. operated light sources for projecting the spectra onto the photo-cell slit and for forming an image of the wave-length scale which indicates the region of the spectrum being method. As the projected spectra are moved horizontally across the slit, a change in phase occurs in the a.c. output of the photo-cell circuit on passing through a match point. The corresponding change in oscullograph pattern indicates whether the absorption is increasing or decreasing, and permits true match points to be distinguished from decreases in intensity due to dense spectrum lines in matching line spectra.

Citation
JOHN R. LOOFBOUROW, "A Push-Pull Photoelectric Photodensitometer for Determining Fine Structure in Ultraviolet Absorption Spectra," J. Opt. Soc. Am. 29, 535-537 (1939)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-29-12-535


Sort:  Author  |  Journal  |  Reset

References

  1. F. F. Heyroth and J. R. Loofbourow, J. Am. Chem. Soc. 52, 3441 (1931).
  2. J. R. Loofbourow, Bull. Basic Sci. Research 5, 46 (1933).
  3. Lavin, Northrup and Taylor, J. Am. Chem. Soc. 55, 3497 (1933); Ross, J. Biol. Vhem. 104, 531 (1934); Lavin and Northrup, J. Am. Chem. Soc. 57, 874 (1935); Feraud, Dunn and Kaplan, J. Biol. Chem. 112, 323 (1935); Coulter, Stone and Kabot, J. Gen. Physiol. 19, 739 (1936); Holiday J. Sci. Inst. 14, 166 (1937); Holiday, Biochem. J. 31, 1299 (1937); Lavin and Stanley, J. Biol. Chem. 118, 269 (1937).
  4. H. Kronenberger, Zeits. f. Physik 63, 494 (1930).
  5. J. B. Conant and F. H. Crawford, Proc. Nat. Acad. Sci. 16, 552 (1930).
  6. L. B. Arnold and G. B. Kistiakowsky, J. Am. Chem. Soc. 54, 1713 (1932).
  7. J. R. Loofbourow, Studies Inst. Divi Thomas, in publication.
  8. This transformer, which is of the type used in motion picture push-pull soundheads, was kindly loaned by Mr. M. G. Thomas of the Altec Corporation.
  9. See G. R. Harrison, J. Opt. Soc. Am. 24, 59 (1934) for a review of such devices.

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

OSA is a member of CrossRef.

CrossCheck Deposited