ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
A new-generation infrared-television pupillometer is described and related issues are discussed. In order to obtain a back-lit image of the pupil of the eye, and infrared-LED illuminator that outputs a squeezed beam and a recent CCD camera having enhanced sensitivity in the near-infrared region were incorporated. The infrared-ray exposure to the eye by this method was determined to be quite low and hence a prolonged reconding could be made with safety. The bright-pupil image gives a definite pupil/iris boundary so that more accurate tracing of pupillary movement becomes feasible. In particular, intrinsic responses of the pupil in dim and dark adapted conditions can be measured stably and precisely. Simple, carefully designed, and inexpensive hardware implementation using a microcomputer, as well as a necessary control program for autonomous data acquisition, is presented in detail.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1141297
Permalink