Multicolour optical device

Details Multicolour optical device Multicolour optical device

G - Physics

01

T

315/27

G01T 1/24 (2006.01)

Patent

CA 1265575

MULTICOLOUR OPTICAL DEVICE ABSTRACT OF THE DISCLOSURE A multicolour optical device having at least three optically stable states includes a plurality of pairs of associated light sensors and light sources for emitting light of respectively different colours when activated. An optical feedback is established in each pair tending to maintain the light source either in its illuminated or in its extinguished condition. Outputs of the light sources are blended to obtain a composite light signal of a colour in accordance with the conditions of respective light sources. Means are provided for selectively transferring the light sources from one to other of their conditions to thereby change the colour of the composite light signal.

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