Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2006-08-08
2006-08-08
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C250S23700G, C250S574000, C250S559320, C356S073000
Reexamination Certificate
active
07087877
ABSTRACT:
A pair of optical gratings are used to modulate light from an object, and the modulated light from either grating is used to determine the velocity of the object. Each optical grating is offset from a reference focal point by the same distance, one grating being offset in a positive direction, the other in a negative direction. Signals produced in response to the modulated light can be processed to determine a direction in which a primary collection lens should be moved in order to improve a focus of the imaging system on the object. The lens is moved incrementally in the direction so determined, and the process is repeated until an optimal focus is achieved. In a preferred embodiment, the signals are weighted, so that the optical grating disposed closest to the optimal focus position contributes the most to velocity detection.
REFERENCES:
patent: 2772479 (1956-12-01), Doyle
patent: 3432237 (1969-03-01), Flower et al.
patent: 3525695 (1970-08-01), Gamertsfelder et al.
patent: 3706494 (1972-12-01), Gardner
patent: 3711200 (1973-01-01), Maughmer
patent: 3832059 (1974-08-01), Iten
patent: 3856403 (1974-12-01), Maughmer et al.
patent: 3922069 (1975-11-01), Kishikawa et al.
patent: 3953126 (1976-04-01), Kim et al.
patent: 4110042 (1978-08-01), Leitz
patent: 4148585 (1979-04-01), Bargeron et al.
patent: 4635293 (1987-01-01), Watanabe
patent: 4677680 (1987-06-01), Harima et al.
patent: 4725136 (1988-02-01), McCullough et al.
patent: 4729109 (1988-03-01), Adrian et al.
patent: 4770992 (1988-09-01), Van den Engh et al.
patent: 4786165 (1988-11-01), Yamamoto et al.
patent: 5014131 (1991-05-01), Reed et al.
patent: 5054913 (1991-10-01), Ishikawa et al.
patent: 5096807 (1992-03-01), Leaback
patent: 5141609 (1992-08-01), Sweedler et al.
patent: 5153916 (1992-10-01), Inagaki et al.
patent: 5159397 (1992-10-01), Kosaka et al.
patent: 5159398 (1992-10-01), Maekawa et al.
patent: 5159642 (1992-10-01), Kosaka
patent: 5160976 (1992-11-01), Carr et al.
patent: 5229830 (1993-07-01), Ishida et al.
patent: 5247339 (1993-09-01), Ogino
patent: 5247340 (1993-09-01), Ogino
patent: 5272354 (1993-12-01), Kosaka
patent: 5333044 (1994-07-01), Shaffer
patent: 5351311 (1994-09-01), Rogers
patent: 5422712 (1995-06-01), Ogino
patent: 5444527 (1995-08-01), Kosaka
patent: 5471294 (1995-11-01), Ogino
patent: 5491642 (1996-02-01), Wormell et al.
patent: 5548395 (1996-08-01), Kosaka
patent: 5596401 (1997-01-01), Kusuzawa
patent: 5633503 (1997-05-01), Kosaka
patent: 5644388 (1997-07-01), Maekawa et al.
patent: 5674743 (1997-10-01), Ulmer
patent: 5695934 (1997-12-01), Brenner
patent: 5754291 (1998-05-01), Kain
patent: 5760899 (1998-06-01), Eismann
patent: RE35868 (1998-08-01), Kosaka
patent: 5831723 (1998-11-01), Kubota et al.
patent: 5848123 (1998-12-01), Strommer
patent: 5855753 (1999-01-01), Trau et al.
patent: 5859694 (1999-01-01), Galtier et al.
patent: 5929986 (1999-07-01), Slater et al.
patent: 5959953 (1999-09-01), Alon
patent: 5982478 (1999-11-01), Ainsworth et al.
patent: 6007994 (1999-12-01), Ward et al.
patent: 6014468 (2000-01-01), McCarthy et al.
patent: 6066459 (2000-05-01), Garini et al.
patent: 6116739 (2000-09-01), Ishihara et al.
patent: 6156465 (2000-12-01), Cao et al.
patent: 6210973 (2001-04-01), Pettit
patent: 6211955 (2001-04-01), Basiji et al.
patent: 6249341 (2001-06-01), Basiji et al.
patent: 6256096 (2001-07-01), Johnson
patent: 6330081 (2001-12-01), Scholten
patent: 6330361 (2001-12-01), Mitchell et al.
patent: 6381363 (2002-04-01), Murching et al.
patent: 6522781 (2003-02-01), Norikane et al.
patent: 6549664 (2003-04-01), Daiber et al.
patent: 6763149 (2004-07-01), Riley et al.
patent: 7006710 (2006-02-01), Riley et al.
patent: 2001/0006416 (2001-07-01), Johnson
patent: 2002/0126275 (2002-09-01), Johnson
patent: WO 00/42412 (2000-07-01), None
Kubota, Fumio et al. 1995. “Flow Cytometer and Imaging Device Used in Combination.”Cytometry: 21:129-132.
Kubota, F. 2003. “Analysis of red cell and platelet morphology using an imaging-combined flow cytometer.”Clin. Lab. Haem.: 25:71-76.
Ong, Sim Heng. 1985. Development of a System for Imaging and Classifying Biological Cells in a Flow Cytometer. Doctor of Philosophy Thesis. University of Sydney, School of Electrical Engineering, Aug.
Ong, S.H. et al. 1987. “Development of an Image Flow Cytometer.”Analytical and Quantitative Cytology and Histology. XIVth International Conference on Medical and Biological Engineering and the VIIth International Conference on Medical Physics, Finland, Aug.: 375-382.
Ong, S.H. and P.M. Nickolls. 1991. “Optical Design in a Flow System For Imaging Cells.”Sciences in Medicine: 14:2:74-80.
Ong, S.H. and P.M. Nickolls. 1994. “Analysis of MTF Degradation in the Imaging of Cells in a Flow System.”International Journal of Imaging Systems&Technology: 5:243-250.
Satoh, Kaneo et al. 2002. “Small Aggregates of Platelets Can Be Detected Sensitively by a Flow Cytometer Equipped With an Imaging Device: Mechanisms of Epinephrine-Induced Aggregation and Antiplatelet Effects of Beraprost.”Cytometry: 48:194-201.
Wang, Fu-sheng and Fumio Kubota. 2002. “A Novel Apoptosis Research Method With Imaging-Combined Flow Cytometer and HITC or IR-125 Staining.”Cytometry: 50:267-274.
Witzorrek, Joachim et al. 1999. “A New Multiparameter Flow Cytometer: Optical and Electrical Cell Analysis in Combination With Video Microscopy in Flow.”Cytometry: 35:291-301.
Basiji David A.
Frost Keith L.
Ortyn William E.
Perry David J.
Seo Michael J.
Amnis Corporation
Anderson Ronald M.
Luu Thanh X.
Yam Stephen
LandOfFree
Auto focus for a flow imaging system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Auto focus for a flow imaging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auto focus for a flow imaging system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3706505