Light apparatus of an optical mouse with an aperture stop...

Details Light apparatus of an optical mouse with an aperture stop... Light apparatus of an optical mouse with an aperture stop...

2006-11-28

2006-11-28

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

With light limiting or controlling means

C345S163000

Reexamination Certificate

active

07142376

ABSTRACT:
A light apparatus of an optical mouse with an aperture stop and the light projection method thereof are described. The light apparatus has at least one image-forming lens and an aperture stop. The image-forming lens defines an interior area and an external area. The aperture stop has a pupil. The aperture stop shelters the external area of the image-forming lens. The pupil of the aperture stop corresponds to the interior area. The present light apparatus will not produce a light halo on the image detection unit of the optical mouse when the light source of the optical mouse projects a light that passes through the image-forming lens of the light apparatus. Therefore, the image detection unit clearly detects the image of the image detection surface.

REFERENCES:
patent: 6256016 (2001-07-01), Piot et al.
patent: 6967321 (2005-11-01), Leong et al.
patent: 2005/0253058 (2005-11-01), Leong et al.

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