Creating unconventional geometric beams with large depth of field using double freeform-surface optics

Zexin Feng, Brittany D. Froese, Chih Yu Huang, Donglin Ma, Rongguang Liang

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

We consider here creation of an unconventional flattop beam with a large depth of field by employing double freeform optical surfaces. The output beam is designed with continuous variations from the flattop to almost zero near the edges to resist the influence of diffraction on its propagation. We solve this challenging problem by naturally incorporating an optimal transport map computation scheme for unconventional boundary conditions with a simultaneous point-by-point double surface construction procedure. We demonstrate experimentally the generation of a long-range propagated triangular beam through a plano-freeform lens pair fabricated by a diamond-tuning machine.

Original languageEnglish (US)
Pages (from-to)6277-6281
Number of pages5
JournalApplied Optics
Volume54
Issue number20
DOIs
StatePublished - Jul 10 2015

Keywords

  • Computation methods
  • Geometric optical design
  • Laser beam shaping
  • Nonimaging optics
  • Nonspherical lens design

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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