Biofidelic displacement measuring system for an...

Details Biofidelic displacement measuring system for an... Biofidelic displacement measuring system for an...

2006-06-05

2009-12-22

Stafira, Michael P (Department: 2886)

Optics: measuring and testing

Position or displacement

C356S432000

Reexamination Certificate

active

07636169

ABSTRACT:
A sensing system (22) for a device (34) contains a light absorbing or scattering object (44). An illumination device (50,72) generating and emitting an illumination beam into the object (44). A first light filter (85) has at least one associated light spectrum filtering frequency. A first light sensor (60,80) is coupled to the first light filter (85), receives a first object-emitted portion of the illumination beam, and generates a first signal in response to the first portion. A second light filter (88) has at least one associated light spectrum filtering frequency. A second light sensor (62,82) is coupled to the second light filter (88), receives a second objected-emitted portion of the illumination beam, and generates a second signal in response to the second portion. A controller (54) generates a parameter signal, associated with a characteristic of the object, in response to the first signal and the second signal.

REFERENCES:
patent: 5332901 (1994-07-01), Eckles et al.
patent: 5591975 (1997-01-01), Jack et al.
patent: 6934035 (2005-08-01), Yang et al.

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