Apparatus for detecting a pointer within a region of interest

Details Apparatus for detecting a pointer within a region of interest Apparatus for detecting a pointer within a region of interest

2007-06-19

2007-06-19

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C345S173000, C345S175000

Reexamination Certificate

active

10778534

ABSTRACT:
An apparatus for detecting a pointer within a region of interest includes at least one pair of imaging devices. The imaging devices have overlapping fields of view encompassing the region of interest. At least one light source provides illumination across the region of interest and is within the field of view of at least one of the imaging device. A filter is associated with the at least one imaging device whose field of view sees the light source. The filter blocks light projected by the light source to inhibit the imaging device from being blinded by the projected light.

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