Device for detecting movements of an object surface having a...

Details Device for detecting movements of an object surface having a... Device for detecting movements of an object surface having a...

2006-04-25

2006-04-25

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S239000

Reexamination Certificate

active

07034278

ABSTRACT:
A movement detection device, intended particularly for a computer mouse or a hand-held scanner, includes a light source (7) associated with a prism (8) having a non-uniformly plane reflective face. One thus obtains an as uniform as possible illumination of the field (4) of the object whose movements will be detected. An optical system (9) inserted between the field and the optoelectronic sensor (13) fixed to a printed circuit board (6) is mounted on a support (12) fixed to the board.

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patent: 6462330 (2002-10-01), Venkat et al.
patent: 6741234 (2004-05-01), Son
patent: 942 285 (1999-09-01), None

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