Patent ID: 7142376
Filing Date: 2006-11-28
Classification: G02B,G06F

Abstract:
1. A light projection method for a light apparatus of an optical mouse with an aperture stop, the method comprising: providing a light apparatus, wherein the light apparatus comprises at least two image-forming lenses and an aperture stop, and each image-forming lens has an interior area and an external area, the aperture stop including a pupil corresponding to the interior area of the at least two image-forming lenses, the at least two image-forming lenses define a light path, the aperture stop being located in the light path and between the at least two image-forming lenses and sheltering the external area of the at least two image-forming lenses; wherein light from the image detection surface faces a first of the image-forming lenses, part of the light faces and is transmitted to the interior area of the first image-forming lens, and another part of the light faces and is transmitted to the external area of the first image-forming lens; and passing part of the light facing and transmitted to the interior area of the first image-forming lens through the aperture stop to an image detection unit through a second of the image-forming lenses, the aperture stop sheltering the second image-forming lens from the other part of the light that faces and is transmitted to the external area of the first image-forming lens on a front of the image detection unit.