Optics: measuring and testing – Angle measuring or angular axial alignment – Automatic following or aligning while indicating measurement
Reexamination Certificate
2006-07-18
2006-07-18
Lauchman, Layla G. (Department: 2877)
Optics: measuring and testing
Angle measuring or angular axial alignment
Automatic following or aligning while indicating measurement
C356S400000, C359S237000
Reexamination Certificate
active
07079233
ABSTRACT:
An alignment detection system is disclosed for determining whether a modulated illumination field in an imaging system employing an illumination modulator is mis-aligned. The alignment detection system includes a modulator adjustment unit for providing a test pattern on the illumination modulator, a detector for receiving a modulated illumination field from the illumination modulator, a sampling unit for determining at least two sample values (A and C) for each of two areas of the modulated illumination field respectively, and an evaluation unit for determining whether the value |A−C| is greater than a threshold value.
REFERENCES:
patent: 5072239 (1991-12-01), Mitcham
patent: 5081597 (1992-01-01), Kowalski
patent: 5323002 (1994-06-01), Sampsell
patent: 5842088 (1998-11-01), Thompson
patent: 6188427 (2001-02-01), Anderson et al.
patent: 6369936 (2002-04-01), Moulin
patent: 6414706 (2002-07-01), Allen
patent: 6479811 (2002-11-01), Kruschwitz
patent: 6650353 (2003-11-01), Comeau
patent: 6882457 (2005-04-01), Comeau et al.
patent: 6898377 (2005-05-01), LeHoty et al.
patent: 2002/0196245 (2002-12-01), Markis
patent: 437766 (1991-07-01), None
patent: 1069759 (2001-01-01), None
patent: 0791863 (2001-10-01), None
patent: 1293348 (2003-03-01), None
patent: WO 91/15843 (1991-10-01), None
patent: WO 00/69631 (2000-11-01), None
Comeau Bryan
Knox Jeffrey
Rombult Philip A.
Hilton William E.
Lauchman Layla G.
Sabourin Robert A.
LandOfFree
System and method for determining the alignment quality in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for determining the alignment quality in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for determining the alignment quality in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3597740