Patent ID: 8168937

Claim:
An optical head for reading an image of an object, the optical head comprising: a housing; a diffuser, connected to the housing, the diffuser having a chamber; a light source module, having a substrate and a first light source mounted on a front side of the substrate, wherein the front side of the substrate is fixed to an external surface of the diffuser, the substrate is a flexible circuit board, the first light source is connected to the flexible circuit board, the first light source provides an initial light ray incident to the diffuser, and the diffuser processes the initial light ray into uniform light for output in an axial direction of the diffuser; and a light sensing module, fixed in the housing, for sensing reflected light generated from the uniform light reflected by the object disposed outside the diffuser, wherein the reflected light enters the chamber of the diffuser in a direction opposite the direction of the uniform light, and the light source module is entirely disposed outside the chamber so that the initial light ray is transmitted through the diffuser and enters the chamber.