title: Visual stimulator.
abstract: An easily portable apparatus for flicker fusion experiments is described. It uses crossed polarizers to produce modulated beams and a light guide made of optical fibers to mix these beams for producing a sinusoidally modulated stimulus of which the frequency, the modulation amplitude, the luminance, the color adaptation light, and the field size can be varied independently.
authors.affiliation: Institut de Microtechnique de l'EPFL, 114 Route Cantonale, 1025 St-Sulpice, Switzerland.
authors.forename: V
authors.initials: V
authors.lastname: Van Toi
authors.forename: P A
authors.initials: PA
authors.lastname: Grounauer
mesh_terms: D004594:Electrophysiology / Q000295:instrumentation* / Q000379:methods; D004596:Electroretinography / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D005425:Flicker Fusion; D006801:Humans; D008027:Light; D055095:Optics and Photonics; D010775:Photic Stimulation; D014785:Vision, Ocular