Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2011-08-09
2011-08-09
Ko, Tony (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C345S156000, C385S012000
Reexamination Certificate
active
07994468
ABSTRACT:
An optical input device for measuring relative movement between an object (15) and a sensor unit comprising a laser device (3, 5) having a laser cavity for emitting a measuring beam (13, 17) and a respective radiation-sensitive detector (4, 6) for generating a measurement signal representative of changes in the operation of the laser device (3, 5) as a result of measuring beam radiation re-entering the laser cavity. A sensor unit is provided for measuring relative movement along each measuring axis in an action plane, and the resultant measurement signal from one or each of the sensor units is used to determine distance and/or movement of the input device and the object (15) relative to each other along a measuring axis transverse to the action plane by summing the offset frequency of a rising and falling slope of the measurement signal.
REFERENCES:
patent: 6301968 (2001-10-01), Maruyama et al.
patent: 6707027 (2004-03-01), Liess et al.
patent: 6741335 (2004-05-01), Kinrot et al.
patent: 2005/0157971 (2005-07-01), Juijve et al.
patent: 2005/0243053 (2005-11-01), Liess et al.
patent: 1182606 (2002-02-01), None
patent: 2405710 (2005-03-01), None
patent: 0109708 (2001-02-01), None
patent: 0237124 (2002-05-01), None
patent: 03098527 (2003-11-01), None
patent: 03102717 (2003-12-01), None
patent: 2005055037 (2005-06-01), None
patent: 2005076116 (2005-08-01), None
Martin Liess, et al: A Miniaturized Multidirectional Optical Motion Sensor and Input Device Based on Laser Self-Mixing, Meas. Sci. Technol. Dec. 2002, pp. 2001-2006, XP001201128.
Katsuhiko Hara, et al: New Digital Vibrometer with High Accuracy Using Self-Mixing Type LDV, IEEE Instrunentation and Measurement Tech. Conf. May 19, 1997, pp. 860-864, XP010233690.
Duijve Rene
Heinks Carsten
Schemmann Marcel
Stek Aalbert
Ko Tony
Koninklijke Philips Electronics , N.V.
LandOfFree
Method of measuring relative movement in two dimensions of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of measuring relative movement in two dimensions of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring relative movement in two dimensions of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2625931