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• W3135127764 endingPage "B322" @default.
• W3135127764 startingPage "B298" @default.
• W3135127764 abstract "The design of freeform optical surfaces is an inverse problem in illumination optics. Combining the laws of geometrical optics and energy conservation gives rise to a generalized Monge--Ampère equation. The underlying mathematical structure of some optical systems allows for an optimal-transport formulation of the problem with an associated cost function. This motivates the design of optimal-transport-based numerical algorithms. However, not all optical systems can be cast in the framework of optimal transport. In this paper, we derive a formulation in terms of generating functions where the generalized Monge--Ampère equation becomes a generated Jacobian equation. We present an iterative least-squares algorithm that can be used to solve generated Jacobian equations. We consider two example systems: System 1 is a single freeform lens with a point source and far-field target, and System 2 is a single freeform reflector with a parallel source beam and near-field target. We introduce a novel derivation of the generating functions via Hamilton's characteristics. We can associate a cost function to System 1, and we compare the performance of the numerical algorithm to a previous optimal-transport-based version. System 2 cannot be formulated as an optimal-transport problem, which demonstrates the wider applicability of the new version of the algorithm to any optical system that can be described by a smooth generating function." @default.
• W3135127764 created "2021-03-15" @default.
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• W3135127764 date "2021-01-01" @default.
• W3135127764 modified "2023-09-28" @default.
• W3135127764 title "An Iterative Least-Squares Method for Generated Jacobian Equations in Freeform Optical Design" @default.
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• W3135127764 doi "https://doi.org/10.1137/20m1338940" @default.
• W3135127764 hasPublicationYear "2021" @default.
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