Advancements in transformation optics-enabled gradient-index lens design

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Transformation Optics (TO) provides the mathematical framework for representing the behavior of electromagnetic radiation in a given geometry by â€transformingâ€it to an alternative, usually more desirable, geometry through an appropriate mapping of the constituent material parameters. Using a quasi-conformal mapping, the restrictions on the required material parameters can be relaxed allowing isotropic inhomogeneous all-dielectric materials to be employed. This approach has led to the development of a new and powerful design tool for gradient-index (GRIN) optical systems. Using TO, aspherical lenses can be transformed to simpler spherical and flat geometries or even rotationally-Asymmetric shapes which result in true 3D GRIN profiles. TO can also potentially be extended to collapse an entire lens system into a representative GRIN profile thus reducing its physical dimensions while retaining the optical performance of the original system. However, dispersion effects of the constituent materials often limit the bandwidth of metamaterial and TO structures thus restricting their potential applicability. Nonetheless, with the proper pairing of GRIN profile and lens geometry to a given material system, chromatic aberrations can be minimized. To aid in the GRIN construction, we employ advanced multi-objective optimization algorithms which allow the designer to explicitly view the trade-offs between all design objectives such as RMS spot size, field-of-view (FOV), lens thickness, and focal drift due to chromatic aberrations. We present an overview of our TO-enabled GRIN lens design process and analysis techniques while demonstrating designs which minimize the presence of mono-and poly-chromatic aberrations and discuss their requisite material systems.

Original languageEnglish (US)
Title of host publicationNovel Optical Systems Design and Optimization XVIII
EditorsG. Groot Gregory, Cornelius F. Hahlweg, Cornelius F. Hahlweg, Arthur J. Davis, G. Groot Gregory, Arthur J. Davis
PublisherSPIE
ISBN (Electronic)9781628417456, 9781628417456
DOIs
StatePublished - Jan 1 2015
Event18th Conference of Novel Optical Systems Design and Optimization - San Diego, United States
Duration: Aug 10 2015Aug 12 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9579
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

Other18th Conference of Novel Optical Systems Design and Optimization
CountryUnited States
CitySan Diego
Period8/10/158/12/15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Campbell, S., Brocker, D., Nagar, J., Easum, J. A., Werner, D. H., & Werner, P. L. (2015). Advancements in transformation optics-enabled gradient-index lens design. In G. G. Gregory, C. F. Hahlweg, C. F. Hahlweg, A. J. Davis, G. G. Gregory, & A. J. Davis (Eds.), Novel Optical Systems Design and Optimization XVIII [95790E] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9579). SPIE. https://doi.org/10.1117/12.2187513