Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1990-11-14
1993-02-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
359221, H01J 516
Patent
active
051873648
ABSTRACT:
A scanning device has a drive system to angularly reciprocate a rotatable mirror about an axis in a desired waveform in accordance with an excitation signal supplied by a programmable waveform generator. A position sensor generated as signal representing the actual waveform of reciprocation of the mirror, and a microprocessor determines a signal representing the error between the actual waveform and the desired waveform. The microprocessor includes a waveform optimizer that receives this error signal and delivers an excitation correction signal to the waveform generator to adjust the excitation signal from the waveform generator to cause the mirror to have an actual waveform substantially in accordance with the desired waveform.
REFERENCES:
patent: 3717772 (1973-02-01), Engman
patent: 4286212 (1981-08-01), Staebler et al.
patent: 4329011 (1982-05-01), Mori et al.
patent: 4350988 (1982-09-01), Masegi
patent: 4368489 (1983-01-01), Stemme et al.
patent: 4638156 (1987-01-01), Horikawa et al.
patent: 4648685 (1987-03-01), Fukai et al.
patent: 4695722 (1987-09-01), Motooka
patent: 4800270 (1989-01-01), Blais
patent: 4800271 (1989-01-01), Blais
F. Blais-"High Precision Control of Galvanometer Scanner" vol. 817, pp. 8-16; Spie's 31st Symposium on Optical and Opto-Electronic Science and Engineering, Aug. 16 to 21, 1987 San Diego, U.S.A.
G. F. Marshal, "Laser Beam Scanning:Opto-Mechanical Devices, Systems and Data Storage Optics" published by Marcel Dekker, Inc, 1985, pp. 244-250 (especially section 5.1.2 and FIG. 29.
S. J. Orfanidis, "Optimum Signal Processing:An Introduction" published by MacMilland Publishing Co. 1985, Chapter 7, pp. 404 tp 408.
F. Blais, "Control of Low Inertia Galvanometers for High Precision Laser Scanning Systems" published in Optical Engineering vol. 27 No. 2, 104-110 (Feb. 1988).
Le Que T.
National Research Council of Canada/Conseil National de Recherch
Nelms David C.
LandOfFree
Scanning device with waveform generator optimizer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Scanning device with waveform generator optimizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scanning device with waveform generator optimizer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2149550