Optics: measuring and testing – Range or remote distance finding – With photodetection
Reexamination Certificate
2007-10-16
2007-10-16
Tarcza, Thomas H. (Department: 3662)
Optics: measuring and testing
Range or remote distance finding
With photodetection
C356S005100, C356S005010
Reexamination Certificate
active
11350222
ABSTRACT:
TOF system shutter time needed to acquire image data in a time-of-flight (TOF) system that acquires consecutive images is reduced, thus decreasing the time in which relative motion can occur. In one embodiment, pixel detectors are clocked with multi-phase signals and integration of the four signals occurs simultaneously to yield four phase measurements from four pixel detectors within a single shutter time unit. In another embodiment, phase measurement time is reduced by a factor (1/k) by providing super pixels whose collection region is increased by a factor “k” relative to a normal pixel detector. Each super pixel is coupled to k storage units and four-phase sequential signals. Alternatively, each pixel detector can have k collector regions, k storage units, and share common clock circuitry that generates four-phase signals. Various embodiments can reduce the mal-effects of clock signal transients upon signals, and can be dynamically reconfigured as required.
REFERENCES:
patent: 5483336 (1996-01-01), Tocher
patent: 2005/0099504 (2005-05-01), Nayar et al.
Nagabhirana Rajeev
O'Connor Patrick
Torunoglu Ilhami
Canesta, Inc.
Kaufman Michael A.
Ratcliffe Luke D.
Tarcza Thomas H.
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