Patent ID: 8502110

Claim:
A multibeam laser device for fabricating a microretarder by a heating process, comprising: an infrared laser source; a multi-beam module configured to split an output beam of the infrared laser source into a plurality of parallel beams with substantially equal intensity, wherein the multi-beam module comprises a plurality of optical elements arranged in predetermined positions such that the output beam of the infrared laser source is split into the plurality of parallel beams corresponding to the predetermined positions; a first driving device configured to provide the multi-beam module with a scanning direction, wherein the multi-beam module forms a plurality of parallel scanning lines on a surface of a retarder in accordance with the scanning direction; a laser power meter configured to receive the output beam passing through the multi-beam module and generate a signal; and a feedback control circuit configured to use the signal to adjust the output beam of the infrared laser so as to maintain stability of the infrared laser source.