Dense multi-axis array for motion sensing

Details Dense multi-axis array for motion sensing Dense multi-axis array for motion sensing

2008-07-29

2008-07-29

Nguyen, Sang (Department: 2886)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S23700G, C250S208200

Reexamination Certificate

active

07405389

ABSTRACT:
The present disclosure describes an optical displacement sensor having a dense multi-axis array of photosensitive elements. Generally, the sensor includes a two dimensional array of multiple photosensitive elements. In one embodiment, the array includes multiple linear arrays of photosensitive elements arranged along three or more axes in a space-filling, close-packed multi-axis array. The photosensitive elements are connected to each other in such a way that motion is determinable along each of the axes by measuring differential photocurrents between photosensitive elements along each of the axes. The inventive architecture advantageously increases signal redundancy, and reduces signal drop-out or low signals due to random fluctuations in the incident or absorbed light or in the signals from the photosensitive elements.

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