Freeform construction method for illumination design by using two orthogonal tangent vectors based on ray mapping

Kaibin Lin; Yangui Zhou; Jincheng Hou; Yongyao Li

doi:10.1117/12.2604951

15 February 2022 Freeform construction method for illumination design by using two orthogonal tangent vectors based on ray mapping

Kaibin Lin, Yangui Zhou, Jincheng Hou, Yongyao Li

Author Affiliations +

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 1216609 (2022) https://doi.org/10.1117/12.2604951
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

To construct freeform surface that best fits the normal field, an efficient numerical method is put forward in this paper. In this method, the normal vectors are constructed by two adjacent orthogonal tangent vectors at each point, and then the normal vectors are substituted into Snell's law to obtain the nonlinear equations describing the surface coordinates. Finally, the continuous and accurate freeform surface can be obtained by solving these nonlinear equations. The simulation results show that the proposed method provides lower RSD and normal deviation than the traditional freeform construction method.

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Kaibin Lin, Yangui Zhou, Jincheng Hou, and Yongyao Li "Freeform construction method for illumination design by using two orthogonal tangent vectors based on ray mapping", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 1216609 (15 February 2022); https://doi.org/10.1117/12.2604951

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KEYWORDS

Ray tracing

Collimation

Scanning tunneling microscopy

Computer simulations

Freeform optics

Lens design

Refractive index

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