Optimized design method for manufacturing fresnel grating

US10061122B2 · kind B2 · utility

Assignee

• Graduate School at Shenzhen, Tsinghua University · CN

Inventors

• Qian Zhou · Beijing, CN
• Jinchao ZHANG · Longbeilingcun, CN
• Xinghui LI · Tuji, CN
• Kai Ni · Sammamish, US
• Jinchao Pang · Tangxia, CN
• Haifei Hu · Tangxia, CN
• Hao Dong · Santa Clara, US
• Huanhuan Wang · Hubei, CN
• Xiangwen Zhu · Tangxia, CN
• Lanlan Wang · 红钢城街道, CN

Key dates

• Filing date: Jul 21, 2016
• Grant date: Aug 28, 2018
• Expiry date: Mar 10, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B27/4266
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

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: Φ (λ)=<AP1P2B>−<AOB>+Nmλ; 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.