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Proceedings Paper

Off-axis parabolic optical relays: almost perfect imaging
Author(s): John L. Holdsworth; Galiya Sharafutdinova; Michael J. Sanderson; Dirk F. van Helden
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Paper Abstract

Off-axis parabolic elements have found application in Tera-Hertz imaging and new application in two-photon microscopy scan engines. Both these applications demand spatial and temporal precision in photon location. This modelling work examines how close off-axis parabolic elements are to the perfect image relay by calculating the geometrical performance metrics of spot diagrams, point spread functions and wavefront distortion for different arrangements of off-axis parabolas and a parabolic torus when compared to a close-coupled two mirror scan engine. Results identify the off-axis parabolic elements as a superior scan engine particularly in wide-field scan instruments. When within the optimum beam size versus parabola focus length ratio, the imaging of these systems is superb.

Paper Details

Date Published: 25 October 2011
PDF: 8 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80112C (25 October 2011); doi: 10.1117/12.903430
Show Author Affiliations
John L. Holdsworth, The Univ. of Newcastle (Australia)
Galiya Sharafutdinova, The Univ. of Newcastle (Australia)
Michael J. Sanderson, Univ. of Massachusetts Medical School (United States)
Dirk F. van Helden, The Univ. of Newcastle (Australia)


Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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