ISSN:
1741-0444
Schlagwort(e):
Charge-coupled device
;
Infra-red
;
Pupillometer
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Chemie und Pharmazie
,
Medizin
Notizen:
Abstract 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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02457826
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