Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-09-26
1991-09-03
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
340556, G01V 904
Patent
active
050456873
ABSTRACT:
An optical instrument is provided which comprises emitter means which emit radiation into an elongated emission space and sensor means responsive to radiation directed towards them from any point of an elongated sensing space whereby to generate tone signals, the emission and sensing spaces being in only partial overlapping relationship, preferably as a result of their having different axes of symmetry, the instrument further comprising means for decoding the tone signals and transmitting the same to an interface to a device to be controlled by the instrument. Said controlled device is preferably chosen from among devices for producing musical tones and devices for producing optical images. The tone signal generating means preferably constitute a number of units, each unit corresponding to a tone and the several units being arranged in a line which preferably defines a closed floor space.
REFERENCES:
patent: 3597755 (1971-08-01), Parkin
patent: 3852592 (1974-12-01), Scoville et al.
patent: 4479053 (1984-10-01), Johnston
patent: 4656462 (1987-04-01), Araki et al.
patent: 4659922 (1987-04-01), Duncan
patent: 4734574 (1988-03-01), Tanaka
patent: 4794248 (1988-12-01), Gray
Allen Stephone B.
Nelms David C.
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