Imaging freeform optical systems designed with NURBS surfaces
Name
Chrisp-2016-Imaging freeform opt.pdf
Size
2.99 MB
Format
Adobe PDF
Checksum (MD5)
6d9ab9c86c1fccb31e7dc5260a20e680
Author(s)
Chrisp, Michael P.
Echter, Michael A.
Primeau, Brian C.
Date Issued
August 2016
Journal
Optical Engineering
Publisher
SPIE
Citation
Chrisp, Michael P., Brian Primeau, and Michael A. Echter. “Imaging Freeform Optical Systems Designed with NURBS Surfaces.” Optical Engineering 55.7 (2016): 71208.
Version
Final published version
Abstract
The designs of two imaging freeform systems using nonuniform rational basis-spline (NURBS) optical surfaces are described. The first system, a 10 deg×9 degf/2 three-mirror anastigmat has four times higher spatial resolution over the image plane compared with the equivalent conventional rotational aspheric design, and 2.5 times higher resolution compared with a 10th-order XY polynomial freeform design. The mirrors for the NURBS freeform design have more than twice the asphericity than the conventional rotational and XY polynomial designs. In the second system, a Ritchey–Chretien telescope followed by a two-mirror NURBS freeform corrector is compared to a four-mirror Korsch telescope, for imaging to a visible-infrared imaging spectrometer. The freeform corrector design had 70% smaller spot sizes over the field and eliminated the large tertiary required in Korsch type design. Both of these NURBS freeform designs are possible due to a custom optical design code for fast accurate NURBS optimization, which now has parallel raytracing for thousands of NURBS grid points.
MIT Department
Lincoln Laboratory
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1117/1.OE.55.7.071208
