Imaging freeform optical systems designed with NURBS surfaces
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...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
SPIE
2016
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| Online Access: | http://hdl.handle.net/1721.1/105221 |
| _version_ | 1811092958079877120 |
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| author | Chrisp, Michael P. Echter, Michael A. Primeau, Brian C. |
| author2 | Lincoln Laboratory |
| author_facet | Lincoln Laboratory Chrisp, Michael P. Echter, Michael A. Primeau, Brian C. |
| author_sort | Chrisp, Michael P. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T15:37:16Z |
| format | Article |
| id | mit-1721.1/105221 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:37:16Z |
| publishDate | 2016 |
| publisher | SPIE |
| record_format | dspace |
| spelling | mit-1721.1/1052212022-10-02T02:59:15Z Imaging freeform optical systems designed with NURBS surfaces Chrisp, Michael P. Echter, Michael A. Primeau, Brian C. Lincoln Laboratory Chrisp, Michael P. Echter, Michael A. Primeau, Brian C. 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. United States. Air Force (Contracts FA8721-05-C-0002 and FA8702-15-D-0001) 2016-11-04T21:19:31Z 2016-11-04T21:19:31Z 2016-08 2015-12 Article http://purl.org/eprint/type/JournalArticle 0091-3286 http://hdl.handle.net/1721.1/105221 Chrisp, Michael P., Brian Primeau, and Michael A. Echter. “Imaging Freeform Optical Systems Designed with NURBS Surfaces.” Optical Engineering 55.7 (2016): 71208. en_US http://dx.doi.org/10.1117/1.OE.55.7.071208 Optical Engineering 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. application/pdf SPIE SPIE |
| spellingShingle | Chrisp, Michael P. Echter, Michael A. Primeau, Brian C. Imaging freeform optical systems designed with NURBS surfaces |
| title | Imaging freeform optical systems designed with NURBS surfaces |
| title_full | Imaging freeform optical systems designed with NURBS surfaces |
| title_fullStr | Imaging freeform optical systems designed with NURBS surfaces |
| title_full_unstemmed | Imaging freeform optical systems designed with NURBS surfaces |
| title_short | Imaging freeform optical systems designed with NURBS surfaces |
| title_sort | imaging freeform optical systems designed with nurbs surfaces |
| url | http://hdl.handle.net/1721.1/105221 |
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