Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Reexamination Certificate
2008-01-30
2010-10-19
Tarcza, Thomas H (Department: 3662)
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
C356S005010, C356S005150, C356S028500
Reexamination Certificate
active
07817254
ABSTRACT:
Sensing results from moving objects, e.g. from photosensing emanating light or from impedance-based sensing, can indicate sensed time-varying waveforms with information about objects. For example, a sensed time-varying waveform can be compared with another waveform, such as a reference waveform produced by objects of a certain type, to obtain comparison results indicating motion-independent information about the object; time-scaling can adjust for displacement rate such as speed. Also, a modulation periodicity value can be obtained from a sensed time-varying waveform and used in obtaining information about an object; for example, a periodic modulation frequency can be used with a given time's chirp frequency to obtain phase information about an object's position. Or, where periodic modulation frequency indicates displacement rate, time scaling during comparison can use a scaling factor based on the frequency. Objects can move fluidically as in flow cytometry or through scanning movement, as in document scanning.
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Bassler Michael
Hegyi Alex
Johnson Noble M.
Kiesel Peter
Palo Alto Research Center Incorporated
Ratcliffe Luke D
Tarcza Thomas H
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