Moveable light spot projection apparatus

Details Moveable light spot projection apparatus Moveable light spot projection apparatus

G - Physics

02

B

88/46, 88/51, 35

G02B 27/18 (2006.01)

Patent

CA 1046316

A projector for projecting a movable spot of light onto a screen includes a pair of plates mounted adjacent and parallel to each other, each plate being opaque, apart from a straight slot. The slots cross one another at a crossing point defining an aperture which is transparent to light from a light source. The plates are mounted to be independently movable in such a way that the aperture is selectively displaceable thereby to allow controlled movement of the spot on the screen.

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