Patent ID: 7324089

Claim:
An improved optical device for an optical mouse, being installed inside a case body of the optical mouse, comprising: a LED, for providing light for the optical device; a fixing base, having a plurality of positioning blocks arranged thereon; a lens mount, supporting a lens, the lens mount being installed on a bottom of the case body of the optical mouse, having a fixing socket with a plurality of positioning notches and an engaging side, wherein, the LED is inset inside the fixing base and the fixing base is inset in and fixes at the fixing socket by insetting the positioning blocks into the positioning notches along with the engaging side abutting against the fixing base; a sensor, supported by and combined with the lens mount by means of a positioning structure, capable of detecting and recording reflected light from a working surface; and a digital signal processor, electrically connecting to the sensor to receive the image data detected by the sensor for accurately determining distances and directions of the mouse movement.