Title: Optical teaching aid

Abstract: A teaching aid for demonstrating the component pure spectral colors of white light and the effect of selective recombination thereof. It utilizes the diffraction principle to produce a spectrum from white light and selectively filters the spectrum. By splitting the filtered light prior to recombination, it is possible to project an image of the selective filter and the recombined selectively filtered light adjacent to each other on a projection screen. Thus, the effects of the variation of the filter is shown directly by a variation in the color and intensity of the recombined light.

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Inventors: Failes, Michael (Mississauga, CA, US)

Application Number: 702720
Filing Date: 1976-07-06
Publication_date: 1977-07-05
Assignee: Canadian Instrumentation and Research Limited (Mississauga, CA); Film Opticals of Canada Limited (Toronto, CA)
Primary Class(es): 434/98 359/566, 434/303
Other Classes:
US Patent Ref:

2155114	Apr, 1939	Black	35/19.
2529107	Nov, 1950	Shapiro	35/19.
3962802	Jun, 1976	Kane	35/19.

Other Refs: 153,325

Nov, 1920	UK

Primary Examiner: Skogquist, Harland S.
Assistant Examiner:
Attorney: George H. Riches and Associates