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PubMed · 5358935

Practical course in instruments and electronics. I. Electronic components.

L W Price
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L W Price. 1969. Practical course in instruments and electronics. I. Electronic components.. https://pubmed.ncbi.nlm.nih.gov/5358935/

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Pupillometer for clinical applications using dual 256-element linear CCD arrays.

A new pupillometer for measuring the size of the pupil of the human eye is described. It uses two inexpensive 256-element charge coupled device (CCD) arrays in an orthogonal configuration. The system is controlled and data are analysed by means of a Z80A microcomputer. Software allows the position and diameter of the pupil to be displayed on a monochrome video monitor. Infra-red diodes irradiate the eye so that measurements can be made in darkness. The accuracy is better than +/- 0.1 mm, over the range 3.2-9.5 mm. Dynamic measurements of the pupil light reflex response can be made with sampling periods as short as 20 ms.

Electronics, Medical↗