Original Article

Citation: Light: Science & Applications (2017) 6, e17026; doi:10.1038/lsa.2017.26
Published online 28 July 2017

Freeform spectrometer enabling increased compactness

Jacob Reimers1, Aaron Bauer1, Kevin P Thompson1,2,maltese cross and Jannick P Rolland1

  1. 1The Institute of Optics, University of Rochester, Rochester, NY 14627, USA
  2. 2Synopsys, Inc., 3 Graywood Lane, Pittsford, NY 14534, USA

Correspondence: J Reimers, Email: jreimers@optics.rochester.edu

maltese crossDeceased.

Received 9 November 2016; Revised 21 February 2017; Accepted 22 February 2017
Accepted article preview online 27 February 2017



We present optical designs with freeform optics in the context of hyperspectral imaging. Results show designs that are 5 × more compact in volume than similar designs using conventional spherical or aspherical surfaces. We will show how combining the concepts of spatial and spectral-band broadening, which will be introduced in this paper, led to the improvement in compactness that is uniquely enabled by freeform optics.


aberrations; freeform optics; imaging spectrometer