Abstract

A simplified microwave model of the human eye was constructed in order to study the characteristics of a model retinal receptor. A technique devised by O’Brien was employed. The model receptor was a truncated cone of polystyrene-foam. This was fitted into a horn which transmitted the energy to a detection unit. The relative sensitivity of the model receptor was determined when it was irradiated by a point source and when it was placed at several different positions in a diffraction pattern at or near the Gaussian image point. The directional sensitivity was studied by pointing it in different directions. In addition, interaction effects between neighboring receptors were studied. Two different wavelengths have been used.

It was found that there were differences in energy absorbed by the detector unit when the model was irradiated by the point source and when it was placed in the Fraunhofer diffraction pattern. More energy was absorbed when a shorter wavelength was employed. It was found that the model antenna became more efficient as it was moved away from the center of the diffraction pattern. The direction of maximum sensitivity shifted as a function of the position of the model antenna in the diffraction pattern. Markedly different directional sensitivity patterns were obtained for different physical distributions, for different positions in those distributions, and for different wavelengths.

There was essentially no interaction between two neighboring receptors if their axes were kept parallel. Interaction did occur if the tapering sides were brought into contact or near contact. The implications of these findings are discussed.

© 1958 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Response of a Model Retinal Receptor as a Function of Wavelength*

Jay M. Enoch
J. Opt. Soc. Am. 50(4) 315-320 (1960)

Millimeter-wave model of a foveal receptor

Peter J. de Groot and Ronald E. Terpstra
J. Opt. Soc. Am. 70(12) 1436-1452 (1980)

Optical Properties of the Retinal Receptors*†

Jay M. Enoch
J. Opt. Soc. Am. 53(1) 71-85 (1963)

References

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
Login to access OSA Member Subscription

Cited By

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
Login to access OSA Member Subscription

Figures (19)

You do not have subscription access to this journal. Figure files 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
Login to access OSA Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations 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
Login to access OSA Member Subscription