Patent ID: 7629962

Claim:
An image capturing device, comprising: a light-emitting component for generating a light ray; a light-guiding component for providing a first channel for defining a first straight light-guiding path to guide the light ray generated by the light-emitting component toward a surface and providing a second channel for defining a second straight light-guiding path to guide the light ray reflected by the surface towards a sensor; the sensor for sensing the light ray reflected by the surface to detect a movement of the image capturing device on the surface; a protecting component, wherein one side of the protecting component is utilized as a lens for adjusting the optical path of the light ray reflected by the surface, wherein the sensor is installed in the protecting component; and a diaphragm, installed in the protecting component, for filtering the light ray reflected toward the sensor; wherein if the light ray is in the visible spectrum, the protecting component is composed of transparent material(s), and the sensor and the diaphragm are positioned in the transparent material(s); and, if the light ray is not in the visible spectrum, the protecting component is composed of opaque material(s), and the sensor and the diaphragm are positioned in the opaque material(s).