Filter of photoelectric touch panel with integral spherical prot

Details Filter of photoelectric touch panel with integral spherical prot Filter of photoelectric touch panel with integral spherical prot

1986-05-19

1988-04-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250216, G01V 904

Patent

active

047376317

ABSTRACT:
A filter of a photoelectric touch panel which is disposed on the front of an array mounted with light emitting elements and/or light receiving elements and disposed around a faceplate in the form of a frame, and characterized in that converging sections are formed on the filter at least at positions corresponding to the individual elements, thereby eliminating preparation of converging lenses.

REFERENCES:
patent: 4015122 (1977-03-01), Rubinstein
patent: 4267443 (1981-05-01), Carroll et al.
patent: 4467193 (1984-08-01), Carroll

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