Abstract

The direct formulation of a freeform optical surface for producing a prescribed irradiance from a point source is very complicated. Instead of directly determining the freeform optical surfaces, we derive a general equation of a parameterized outgoing wavefront, regardless of the structure of the optical element. A separate process is employed to construct the freeform optics following the solution of the wavefront equation. We iteratively revise the wavefront and accordingly update the freeform optics to improve performance. The new method combines two features: (i) the formula derivation process is simplified, and (ii) it could flexibly generate a variety of freeform optical structures with high accuracy.

© 2019 Optical Society of America

Single freeform surface design for prescribed input wavefront and target irradiance

Christoph Bösel and Herbert Gross
J. Opt. Soc. Am. A 34(9) 1490-1499 (2017)

Double freeform illumination design for prescribed wavefronts and irradiances

Christoph Bösel and Herbert Gross
J. Opt. Soc. Am. A 35(2) 236-243 (2018)

Iterative freeform lens design for optical field control

Zexin Feng, Dewen Cheng, and Yongtian Wang
Photon. Res. 9(9) 1775-1783 (2021)

Transferring freeform lens design into phase retrieval through intermediate irradiance transport

Zexin Feng, Dewen Cheng, and Yongtian Wang
Opt. Lett. 44(22) 5501-5504 (2019)

Ray mapping method for off-axis and non-paraxial freeform illumination lens design

Karel Desnijder, Peter Hanselaer, and Youri Meuret
Opt. Lett. 44(4) 771-774 (2019)