Objective function for minimizing optical pathlength difference in design of flat-field holographic concave gratings

Siyu Chen; Lijiang Zeng; Lifeng Li

doi:10.1117/12.2643683

19 December 2022 Objective function for minimizing optical pathlength difference in design of flat-field holographic concave gratings

Siyu Chen, Lijiang Zeng, Lifeng Li

Author Affiliations +

Proceedings Volume 12318, Holography, Diffractive Optics, and Applications XII; 123182D (2022) https://doi.org/10.1117/12.2643683
Event: SPIE/COS Photonics Asia, 2022, Online Only

Conference Poster

Abstract

An objective function that closely represents the maximum optical pathlength difference on the entire grating surface for designing a flat-field holographic concave grating is proposed. Compared to design methods that minimize certain aberration coefficients of the optical pathlength function, the present objective function has a clearer physical meaning of optical pathlength difference and guarantees a smaller spot size. Compared to design methods that minimize the spot size based on ray tracing, the present method requires less computing time, but is equally effective in minimizing spot size, and it even provides a better image quality in the sagittal direction.

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Siyu Chen, Lijiang Zeng, and Lifeng Li "Objective function for minimizing optical pathlength difference in design of flat-field holographic concave gratings", Proc. SPIE 12318, Holography, Diffractive Optics, and Applications XII, 123182D (19 December 2022); https://doi.org/10.1117/12.2643683

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