Door sensor system

Details Door sensor system Door sensor system

G - Physics

08

B

G08B 13/184 (2006.01) E05F 15/20 (2006.01)

Patent

CA 2162214

A light-emitter emits light, and a plano-convex condenser lens focuses the emitted light and projects the focused light onto a floor near a door to thereby establish a sensing area. A plano- convex light-receiving lens focuses light reflected from the sensing area, and a light-receiver receives the focused, reflected light. The plano-convex lenses have edges closer to the door which is substantially straight.

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