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PubMed · 4354177

[A quartz controlled threshold pacemaker using intensive integrated circuit technic].

H D Funke
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Electronics, MedicalHumansPacemaker, ArtificialSilicon DioxideTime FactorsJournal Article

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H D Funke. 1973. [A quartz controlled threshold pacemaker using intensive integrated circuit technic].. https://pubmed.ncbi.nlm.nih.gov/4354177/

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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.

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