Guangzhou Tyrafos Semiconductor Technologies Co., Ltd

Guangzhou Tyrafos Semiconductor Tech. Co., Ltd.

Lu-Lang Hsu

Hsu-Wen Fu

Jun-Wen Chung

A surface light source projection device with improved zero-order diffraction includes a light exit module and a diffractive optical module. The diffractive optical module has two micron diffraction layers, the micron diffraction layers include a plurality of microstructures. Each of the microstructures has a circular perimeter and is provided with a recess having an opening inside the circular perimeter. The outer diameter of each of the microstructures is between 5 times and 200 times the incident wavelength of an incident light beam, and the outer diameter of the recess is between 0.3 and 0.7 times the outer diameter of each microstructure.

Surface light source projection device with improved zero-order diffraction

The present invention provides a surface light source projection device, which includes a light emitting module and a diffractive optical module. Wherein, the diffractive optical module has two micron diffractive layers, the micron diffractive layers include a plurality of micron structures, and the shape of the micron structures is set to be cone, disc or any combination of the above. The micron structures have an outer diameter, and the outer diameter of the micron structures is between 5 times and 200 times of the incident wavelength of the light beam output from the light emitting module. Thereby, the surface light source projection device capable of enduring heat accumulation generated after continuous irradiation of high-energy laser is provided to facilitate long-term irradiation and long-distance sensing.

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Hsinchu County, Taiwan

Lu-Lang Hsu