Laser light detector with reflection rejection algorithm

Details Laser light detector with reflection rejection algorithm Laser light detector with reflection rejection algorithm

2007-07-25

2010-11-23

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S216000, C356S141100, C356S152200

Reexamination Certificate

active

07838808

ABSTRACT:
A modulated laser light detector that converts laser light energy into electrical signals which exhibit a frequency that is substantially the same as the laser light modulation frequency, in which these signals allow the detector unit to determine a position where the laser light is impacting upon a photodiode array. A superheterodyne receiver circuit is used to provide high gain at an improved signal-to-noise ratio to improve the range at which the modulated laser light signal can be reliably detected. Various types of signal detection circuits are available. Various processing algorithms are disclosed, including one which rejects laser light strikes that are due to reflections, rather than due to a direct strike from the laser transmitter.

REFERENCES:
patent: 3017046 (1962-01-01), Runci et al.
patent: 3469919 (1969-09-01), Zellner
patent: 3708232 (1973-01-01), Walsh
patent: 3727332 (1973-04-01), Zimmer
patent: 3790277 (1974-02-01), Hogan
patent: 3813171 (1974-05-01), Teach et al.
patent: 3887012 (1975-06-01), Scholl et al.
patent: 3894230 (1975-07-01), Rorden et al.
patent: 3900073 (1975-08-01), Crum
patent: 3997071 (1976-12-01), Teach
patent: 4029415 (1977-06-01), Johnson
patent: 4034490 (1977-07-01), Teach
patent: 4040738 (1977-08-01), Wagner
patent: 4050171 (1977-09-01), Teach
patent: 4052600 (1977-10-01), Wertheimer
patent: 4129224 (1978-12-01), Teach
patent: 4162708 (1979-07-01), Johnson
patent: 4231700 (1980-11-01), Studebaker
patent: 4273196 (1981-06-01), Etsusaki et al.
patent: 4393606 (1983-07-01), Warnecke
patent: 4413684 (1983-11-01), Duncklee
patent: 4477168 (1984-10-01), Hosoe
patent: 4491927 (1985-01-01), Bachmann et al.
patent: 4535699 (1985-08-01), Buhler
patent: 4604025 (1986-08-01), Hammoud
patent: 4674870 (1987-06-01), Cain et al.
patent: 4676634 (1987-06-01), Petersen
patent: 4726682 (1988-02-01), Harms et al.
patent: 4732471 (1988-03-01), Cain et al.
patent: 4756617 (1988-07-01), Cain et al.
patent: 4764410 (1988-08-01), Grzywinski
patent: 4766023 (1988-08-01), Lu
patent: 4829418 (1989-05-01), Nielsen et al.
patent: 4884939 (1989-12-01), Nielsen
patent: 4907874 (1990-03-01), Ake
patent: 4912643 (1990-03-01), Beirne
patent: 4976538 (1990-12-01), Ake
patent: 5159400 (1992-10-01), Takeda et al.
patent: 5174385 (1992-12-01), Shinbo et al.
patent: 5254388 (1993-10-01), Melby et al.
patent: 5343033 (1994-08-01), Cain
patent: 5471049 (1995-11-01), Cain
patent: 5486690 (1996-01-01), Ake
patent: 5528498 (1996-06-01), Scholl
patent: 5682311 (1997-10-01), Clark
patent: 5848485 (1998-12-01), Anderson et al.
patent: 5854988 (1998-12-01), Davidson et al.
patent: 5886776 (1999-03-01), Yost et al.
patent: 5925085 (1999-07-01), Kleimenhagen et al.
patent: 5950141 (1999-09-01), Yamamoto et al.
patent: 5960378 (1999-09-01), Watanabe et al.
patent: 6133991 (2000-10-01), Ake
patent: 6263595 (2001-07-01), Ake
patent: 7012237 (2006-03-01), Ake
patent: 7079987 (2006-07-01), Green
patent: 7224473 (2007-05-01), Zalusky
patent: 2003/0058446 (2003-03-01), Douglas
patent: 2003/0174305 (2003-09-01), Kasper et al.
patent: 2003/0202172 (2003-10-01), Douglas
patent: 2005/0057746 (2005-03-01), Takahashi et al.
patent: 2 101 077 (1983-01-01), None
“360 degree Machine Guidance” and “Depthmaster” sales literature, by Laser Alignment, Inc. (exact date unknown, but known to be before Jun. 12, 1989).
“Laser Control-Receiver LRE-180/360” sales literature, by MOBA Electronic (exact date unknown, but known to be before Jun. 12, 1989).
“A Lock-in Amplifier Primer,” by Princeton Applied Research (1975).
“Explore the Lock-In Amplifier,” by EG&G Princeton Applied Research, Scientific Instrument Group (1983).
“Laserplane Grade-Eye” sales literature, by Spectra-Physics (1985).
“What is a Lock-in Amplifier?” Technical Note TN 1000, by PerkinElmer Instruments (2000).
“The Analog Lock-in Amplifier,” Technical Note TN 1002, by PerkinElmer Instruments (2000).
“Application Note #3 About Lock-In Amplifiers,” by PerkinElmer Instruments (published by 2003).
“What Is a Lock-In Amplifier?” by Boston Electronics (published by 2003).

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