Low profile optical navigation sensor

Details Low profile optical navigation sensor Low profile optical navigation sensor

2008-07-15

2008-07-15

Epps, Georgia Y. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C345S163000, C345S166000

Reexamination Certificate

active

07399955

ABSTRACT:
An apparatus having a coherent light source, an optical sensor, and a controller that can be utilized in optical mice and the like is disclosed. The coherent light source emits coherent light in a cone of angles about an illumination direction. The optical sensor includes an array of photodetectors disposed on a die having a surface substantially perpendicular to the illumination direction. The controller compares first and second images recorded by the optical sensor at different times and determines a displacement indicative of the direction and distance the apparatus has moved between the two different times. A portion of the coherent light source is bonded to the die at a location within the array of photodetectors.

REFERENCES:
patent: 7221356 (2007-05-01), Oliver et al.

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