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Proceedings Paper

Binocular Summation And Its Implications In The Collimation Of Binocular Instruments
Author(s): R. Home
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Paper Abstract

The collimation of binocular telescopes appears to be based on the assumption that the user prefers to accommodate to a stimulus at infinity. Recent work favours the view that for normal observers the preferred accommodative state of the eye is approximately 1 dioptre. Present collimation procedures do not allow the vergence mechanism of the observer's eyes to match their accommodative state. It is shown that the effect of this is to reduce the physiological binocular summation associated with a contrast detection task. A short field trial is reported, where the results obtained in the laboratory were confirmed under realistic conditions. The conclusion is that the present strict tolerances on the collimation of binoculars could be relaxed if the design of binoculars were modified to take into account the accommodative-vergence state of the eye.

Paper Details

Date Published: 12 October 1977
PDF: 7 pages
Proc. SPIE 0098, Assessment of Imaging Systems I, (12 October 1977); doi: 10.1117/12.955287
Show Author Affiliations
R. Home, Royal Armament Research and Development Establishment (England)

Published in SPIE Proceedings Vol. 0098:
Assessment of Imaging Systems I
Thomas L. Williams, Editor(s)

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