Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1996-09-05
1997-09-09
Le, Que
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25023116, 250214PR, 318439, G01D 534
Patent
active
056659652
ABSTRACT:
Optical encoder apparatus and methods are provided for converting the cyclic motion of an electro-mechanical machine, such as an electric motor, into at least one electrical signal having a predetermined waveform. The apparatus may include at least one photo-detector which is responsive to at least one pattern of incident radiant energy. An optically programmed system is optically aligned with the detector, and configured to be actuated by the cyclic motion of the machine. The system modifies at least one pattern of incident radiant energy at the detector, in a plurality of directions, in accordance with an optical function which includes graphical function. The graphical function may be a transform of a waveform function. The system includes an optical element, such as an optical encoder disc, which contains at least one optically detectable graphical pattern. The system also includes a mask containing at least one aperture which permits a pattern of radiant energy to pass to the detector. The energy at the photo-detector is converted into an electrical signal having a predetermined waveform.
REFERENCES:
patent: 3193744 (1965-07-01), Seward
patent: 3634672 (1972-01-01), Weatherred
patent: 3728551 (1973-04-01), Culver et al.
patent: 3757128 (1973-09-01), Vermeulen
patent: 4008425 (1977-02-01), Dickey
patent: 4158800 (1979-06-01), Jahelka et al.
patent: 4160200 (1979-07-01), Imamura et al.
patent: 4190793 (1980-02-01), Parker et al.
patent: 4224515 (1980-09-01), Terrell
patent: 4225787 (1980-09-01), Shapiro et al.
patent: 4227137 (1980-10-01), Hartman
patent: 4286203 (1981-08-01), Ehret
patent: 4353016 (1982-10-01), Born
patent: 4429267 (1984-01-01), Veale
patent: 4438376 (1984-03-01), Varnovitsky
patent: 4588936 (1986-05-01), Itoh et al.
patent: 4599547 (1986-07-01), Ho
patent: 4689540 (1987-08-01), Tani et al.
patent: 4717864 (1988-01-01), Fultz
patent: 4736140 (1988-04-01), Ernst
patent: 4833316 (1989-05-01), Yoneda
patent: 4864300 (1989-09-01), Zaremba
patent: 4882524 (1989-11-01), Lee
patent: 4902885 (1990-02-01), Kojima et al.
patent: 5103225 (1992-04-01), Dolan et al.
patent: 5172039 (1992-12-01), Owens
patent: 5177393 (1993-01-01), Webber
patent: 5198738 (1993-03-01), Blaser et al.
patent: 5250884 (1993-10-01), Okumura
Le Que
Opto Generic Devices Inc.
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