Journal of comparative physiology

, Volume 81, Issue 1, pp 1–8 | Cite as

The optical function of changes in the medium surrounding the cockroach rhabdom

  • Allan W. Snyder
  • G. A. Horridge
Article

Summary

In the dark-adapted eye of the cockroachPeriplaneta, the fused rhabdom is surrounded by a clear watery palisade; in the light-adapted eye this is replaced by pigment. The refractive indices of the rhabdom and its surround have been measured. The physiological effects of this change in structure has been analysed by the electromagnetic theory of light guides. The optical constants are theoretically consistent with the measured tenfold change in sensitivity and changes in acceptance angle of the retinula cells from 6.7 ° ¦(dark-adapted) to 2.4 ° (light-adapted).

Keywords

Refractive Index Physiological Effect Optical Constant Light Guide Optical Function 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Butler, R.: The identification and mapping of spectral cell types in the retina ofPeriplaneta americana. Z. vergl. Physiol.72, 67–80 (1971).Google Scholar
  2. Butler, R.: Studies on the compound eye of the cockroachPeriplaneta americana, Ph. D. thesis submitted to Australian National University, 1972.Google Scholar
  3. Horridge, G. A., Barnard, P. B. T.: Movement of palisade in locust retinula cells when illuminated. Quart. J. micr. Sci.106 131–135 (1965).Google Scholar
  4. Kirschfeld, K., Franceschini, N.: Ein Mechanismus zur Steuerung des Lichtflusses in den Ehabdomeren des Komplexauges vonMusca. Kybernetik6, 13–22 (1969).Google Scholar
  5. Mote, M. I., Goldsmith, T. H.: Spectral sensitivities of color receptors in the compound eye of the cockroachPeriplaneta. J. exp. Zool.173, 137–146 (1970).Google Scholar
  6. Nowikoff, M.: Über den Bau der Komplexaugen vonPeriplaneta (Stylopiga) orientalis L. Jena. Z. Naturw.67, 58–69 (1932).Google Scholar
  7. Snyder, A. W.: Excitation and scattering of modes on a dielectric or optical fiber. IEEE Trans. on Microwave theory and techniques, MTT-17, 1138–1144 (1969).Google Scholar
  8. Snyder, A. W.: Angular sensitivity of the bee ommatidium. Z. vergl. Physiol.76, 438–445 (1972a).Google Scholar
  9. Snyder, A. W.: Power loss on optical fibres. Proc. IEEE60, 325–327 (1972b).Google Scholar
  10. Snyder, A. W., Pask, C.: Detection of polarization and direction by the bee rhabdom. J. comp. Physiol.78, 346–355 (1972).Google Scholar
  11. Tunstall, J., Horridge, G. A.: Electrophysiological investigations of the optics of the locust retina. Z. vergl. Physiol.55, 167–182 (1967).Google Scholar
  12. Varela, F. G., Wiitanen, W.: The optics of the compound eye of the honeybee (Apis mellifera). J. gen. Physiol.55, 336–358 (1970).Google Scholar

Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • Allan W. Snyder
    • 1
  • G. A. Horridge
    • 2
  1. 1.Department of Applied MathematicsCanberraAustralia
  2. 2.Department of Neurobiology Institute of Advanced StudiesAustralian National UniversityCanberraAustralia

Personalised recommendations