Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2007-02-05
2010-10-19
Nguyen, Sang (Department: 2886)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
C356S244000, C356S517000, C356S519000, C250S208200
Reexamination Certificate
active
07817276
ABSTRACT:
While objects travel through an optical cavity, the cavity provides output light that is affected by the objects, causing the output light to have a varying intensity function. The output light is photosensed to obtain sensing results that depend on the varying intensity function. The sensing results are used to distinguish at least one object, such as from its environment or from objects of other types. The objects can, for example, be particles or biological cells, and their optical characteristics, such as refractive index or absorption, can affect the output light, so that information about them is included in the output light. The output light can, for example, have a laterally varying intensity function with peaks whose features change due to the objects. The sensing results can also be used to track objects, together with other information, such as about the speed of a fluid that carries the objects through the cavity.
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Bassler Michael
Kiesel Peter
Schmidt Oliver
Nguyen Sang
Palo Alto Research Center Incorporated
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