Answers are grounded in this paper and cite their sources.
Freeform optics has certain characteristics such as complex surfaces and more degrees to be controlled, so that it is capable of achieving optical mapping relationship, which cannot be achieved by the conventional optical surfaces. There is no applicable method for designing all freeform optics in the optical field until now. The selection of design methods should be based on specific applications. The paper introduces the main optical freeform design methods and their typical applications.
No takes yet. Share an insight, caveat, or question.
Fang et al. (2013) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: