Compact and low profile optical navigation device

Details Compact and low profile optical navigation device Compact and low profile optical navigation device

2007-07-17

2007-07-17

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C345S156000, C345S175000

Reexamination Certificate

active

11085282

ABSTRACT:
An optical navigation device detects relative motion of non-optically flat surfaces, e.g. fingers by comparing the captured images of the surface texture, e.g. ridges on the finger. Within a housing, a light source and a sensor array are positioned proximately. The sensor array is mounted on a substrate. A lens array interposes the surface to be imaged and the sensor array such that a 1:1 image of the surface, e.g. finger surface of the user onto the 2D sensor array, is formed. The micro-lenses may be designed to match individual pixels on the sensor array, or each element of the lens array is used to cover a group of pixels on the sensor. The micro-lenses may be positioned such that the image is formed onto the sensor array or formed in a plane in space such that the image is defocused from the surface.

REFERENCES:
patent: 5907152 (1999-05-01), Dandliker et al.
patent: 2002/0104957 (2002-08-01), Liess et al.
patent: 2002/0167489 (2002-11-01), Davis
patent: 2005/0275618 (2005-12-01), Juh et al.
patent: 0081348 (1983-06-01), None
patent: 1073005 (2001-01-01), None
patent: 1241616 (2002-09-01), None
patent: 1429235 (2004-06-01), None
Search Report under Section 17(5), Search Report From GP Patent Office, Jul. 3, 2006, 4 pgs.

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