Optical proximity switch
View Patent ↗An optical proximity switch includes an optical transmitter for emitting a light signal, a transmitting lens with total internal reflection-using the light signal to form and transmit a light beam , a receiver, an imaging receiving lens for receiving and transmitting to the receiver the light signal, and an electronic circuit for evaluating the light signal received by the receiver.
1. An optical proximity switch comprising:
an optical transmitter for emitting a light signal;
a transmitting lens including a region of total internal reflection using the light signal to form and transmit a light beam;
a receiver;
an imaging receiving lens for receiving and transmitting to the receiver the light signal;
an electronic circuit for evaluating the light signal received by the receiver; and
wherein the transmitting lens is located within a second circular area, and the receiving lens at least partially fills a crescent-shaped area portion of a first circular area that encompasses both the transmitting lens and the imaging receiving lens.
2. The optical proximity switch of claim 1 , wherein the electronic circuit trips a binary switching signal as a function of the light signal received by the receiver.
3. The optical proximity switch of claim 1 , further comprising:
a Lambert emitter operatively coupled with the transmitting lens.
4. The optical proximity switch of claim 3 , wherein the transmitting lens and the receiving lens are disposed side-by-side within the first circular area.
5. The optical proximity switch of claim 4 , wherein the receiving lens further comprises a Fresnel lens.
6. The optical proximity switch of claim 1 , wherein the receiving lens ( 4 ) further comprises a Fresnel lens.
7. An optical proximity switch comprising:
an optical transmitter for emitting a light signal into a surveillance zone;
a transmitting lens with total internal reflection using the light signal to form and transmit a light beam;
a receiver;
an imaging receiving lens for receiving and transmitting to the receiver the light signal from the surveillance zone;
an electronic circuit for evaluating the light signal received by the receiver; and
a Lambert emitter operatively coupled with the transmitting lens; and
wherein the transmitting lens and the receiving lens are disposed side-by-side within a first circular area, the transmitting lens is located within a second circular area, and the receiving lens at least partially fills a crescent-shaped area portion of the first circular area.
8. The optical proximity switch of claim 7 , wherein the receiving lens further comprises a Fresnel lens.