Share Email Print

Optical Engineering

An Optical System for an Automatic Eye Refractor
Author(s): C. R. Munnerlyn
Format Member Price Non-Member Price
PDF $20.00 $25.00

Paper Abstract

Various instruments to measure the refractive state of the eye have been built based on a servosystem concept. This paper describes the optical system of the Dioptron automatic objective refractor. This autorefractor measures the modulation of a grating image formed on the retina while being controlled by a digital computer. The optical subsystems include the image projecting system, the image detecting system, the patient fixation target, and the patient alignment system. Accuracy is obtained by controlling the patient's accommodation and eliminating "instrument" myopia. The overall system is designed to be compact while maintaining very good signal-to-noise ratio and minimum operator controls.

Paper Details

Date Published: 1 December 1978
PDF: 4 pages
Opt. Eng. 17(6) 176627 doi: 10.1117/12.7972293
Published in: Optical Engineering Volume 17, Issue 6
Show Author Affiliations
C. R. Munnerlyn, Coherent, Inc. (United States)

© SPIE. Terms of Use
Back to Top