Creating unconventional geometric beams with large depth of field using double freeform-surface optics
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2015-07-07 |
| Journal | Applied Optics |
| Authors | Zexin Feng, Brittany D. Froese, ChihāYu Huang, Donglin Ma, Rongguang Liang |
| Institutions | The University of Texas at Austin, University of Arizona |
| Citations | 30 |
Abstract
Section titled āAbstractāWe 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.