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. 1980 Jan;383(2):173-9.
doi: 10.1007/BF00581879.

A mechanical oscilloscope for vision research

J Molenaar, R Voorhorst, A W Schreurs, P Broekhuyzen, J Nivard, W A van de Grind

A mechanical oscilloscope for vision research

J Molenaar et al. Pflugers Arch. 1980 Jan.

Abstract

A "mechanical oscilloscope" is described in which a lightbeam (Z-axis) is projected via a single front aluminized moving mirror. The mirror is mounted in a suspension frame allowing the simultaneous rotation about two mutually perpendicular axes. The linear displacements of two loudspeaker-coils are transformed mechanically into mirror rotations and an electronic position/velocity feedback control system is used to drive the loudspeakers. The bandwidth of the resulting X- and Y-axis deflection systems is of the order of 100-200 Hz. The flexibility of Z-axis control (colour, pattern, intensity, etc.) makes this instrument an attractive component of light stimulation systems for psychophysical or electrophysiological studies of vision.

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