Optical teaching aid

Details Optical teaching aid Optical teaching aid

1976-07-06

1977-07-05

Skogquist, Harland S.

350162R, 350171, G09B 2322

Patent

active

040330524

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.

REFERENCES:
patent: 2155114 (1939-04-01), Black
patent: 2529107 (1950-11-01), Shapiro
patent: 3962802 (1976-06-01), Kane

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