Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1985-12-26
1987-11-10
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250566, 235472, 340707, G06K 710
Patent
active
047059427
ABSTRACT:
A light pen which includes a transparent rod at its pointing end through which light is directed to a photodetector that is fixedly positioned within the light pen. The rod is spring loaded and axially slidable in response to applied pressure, resulting in different light intensities being applied to the photodetector and further resulting in an output voltage generated by the photodetector that is directly related to the applied pressure.
REFERENCES:
patent: 3271515 (1966-09-01), Harper
patent: 3334236 (1967-08-01), Bacon
patent: 3498692 (1970-03-01), Jewitt et al.
patent: 3569617 (1971-03-01), Allen et al.
patent: 3917955 (1975-11-01), Inuiya
patent: 3920959 (1975-11-01), Wefers et al.
patent: 4109146 (1978-08-01), Hillman
patent: 4263592 (1981-04-01), Takahashi et al.
patent: 4454417 (1984-06-01), May
patent: 4490607 (1984-12-01), Pease et al.
patent: 4575627 (1986-03-01), Pease et al.
"Moment Calculations by Digital Filters," AT&T Bell Laboratories Technical Journal, vol. 63, No. 2, Feb. 1984, Z. L. Budrikis and M. Hatamian, pp. 217-229.
Budrikis Zigmantas L.
Hatamian Mehdi
Kubik Peter S.
Netravali Arun N.
American Telephone and Telegraph Company AT&T Bell Laboratories
Brendzel Henry T.
Westin Edward P.
Wieland Charles F.
LandOfFree
Pressure-sensitive light pen does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure-sensitive light pen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure-sensitive light pen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1069482