Patent ID: 7880723

Claim:
A multiple function optical image detecting structure, comprising: a shell body having a receiving space and a through hole that links through the receiving space; a tracing ball rotatably positioned in the receiving space of the shell body, wherein part of a spherical surface of the tracing ball extends outside of the shell body, and another part of the spherical surface of the tracing ball corresponds to the through hole; an optical base located on one side of the through hole, wherein the optical base has an inclined spectroscope and a lens element located on one side of the spectroscope, and the spectroscope slantedly faces towards the through hole; a circuit board located on one side of the optical base; a light-emitting element electrically connected with the circuit board, wherein a light axial of the projected light generated from the light-emitting element faces towards the spectroscope of the optical base, the light axial of the projected light that has been reflected/transmitted by the spectroscope one time or more than one time is located on part of the spherical surface of the tracing ball, an spherical surface image of the tracing ball is reflected to the spectroscope, and a light axial of an obtaining-image and the light axial of the light projected by the spectroscope are overlapped; and an image sensor electrically connected with the circuit board, wherein the image sensor faces towards the lens element, the light axial of the obtaining-image is projected onto the lens element by the spectroscope; thereby, the image sensor obtains the image on the lens element to determine the moving distance and direction of the tracing ball and calculate a displacement.