Tailoring freeform illumination optics in a double-pole coordinate system

Donglin Ma; Zexin Feng; Rongguang Liang

doi:10.1364/AO.54.002395

Tailoring freeform illumination optics in a double-pole coordinate system

Donglin Ma, Zexin Feng, Rongguang Liang

Optical Sciences

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

We have developed a new method to design freeform illumination optics by introducing a double-pole coordinate system in ray mapping. This method establishes a much more accurate ray mapping by moving the two poles of the spherical coordinate system to the southernmost point of the sphere and overlapping them together. It can reduce surface error and improve illumination uniformity significantly. The residual surface error (RSE) of the freeform lens designed in the double-pole coordinate system is one magnitude smaller than that of the lens designed in the (θ; φ) coordinate system and is only 1/3 of that of the freeform surface designed in the (u; v) coordinate system.

Original language	English (US)
Pages (from-to)	2395-2399
Number of pages	5
Journal	Applied optics
Volume	54
Issue number	9
DOIs	https://doi.org/10.1364/AO.54.002395
State	Published - 2015

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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10.1364/AO.54.002395

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abstract = "We have developed a new method to design freeform illumination optics by introducing a double-pole coordinate system in ray mapping. This method establishes a much more accurate ray mapping by moving the two poles of the spherical coordinate system to the southernmost point of the sphere and overlapping them together. It can reduce surface error and improve illumination uniformity significantly. The residual surface error (RSE) of the freeform lens designed in the double-pole coordinate system is one magnitude smaller than that of the lens designed in the (θ; φ) coordinate system and is only 1/3 of that of the freeform surface designed in the (u; v) coordinate system.",

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AB - We have developed a new method to design freeform illumination optics by introducing a double-pole coordinate system in ray mapping. This method establishes a much more accurate ray mapping by moving the two poles of the spherical coordinate system to the southernmost point of the sphere and overlapping them together. It can reduce surface error and improve illumination uniformity significantly. The residual surface error (RSE) of the freeform lens designed in the double-pole coordinate system is one magnitude smaller than that of the lens designed in the (θ; φ) coordinate system and is only 1/3 of that of the freeform surface designed in the (u; v) coordinate system.

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Tailoring freeform illumination optics in a double-pole coordinate system

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