Tsinghua University

Haifei Hu

Qian Zhou

Hao Dong

Jinchao Zhang

Kai Ni

Jinchao Pang

Xiangwen Zhu

Lanlan Wang

Xinghui Li

Huanhuan Wang

An optimized design method for manufacturing a Fresnel grating is disclosed, including the following steps: (1) making a Fresnel surface type of the Fresnel grating equivalent to a curved surface type, and determining, based on the curved surface type to which the Fresnel surface type is equivalent, an optical path difference function of the Fresnel grating: &#x3a6; (&#x3bb;)=&#x3c;APPB&#x3e;&#x2212;&#x3c;AOB&#x3e;+Nm&#x3bb;; and (2) determining a Fresnel grating parameter that minimizes a function value of the optical path difference function, so as to manufacture a Fresnel grating that has an aberration elimination effect. The manufactured Fresnel grating may effectively eliminate a portion of aberrations of the Fresnel grating, and increase a resolution of a spectrometer.

Optimized design method for manufacturing fresnel grating

Growing community of inventors

Guangdong, China

Haifei Hu