- Title
- Off-axis parabolic optical relays: almost perfect imaging
- Creator
- Holdsworth, John L.; Sharafutdinova, Galiya; Sanderson, Michael J.; van Helden, Dirk F.
- Relation
- 22nd Congress of the International Commission for Optics: Light for the Development of the World. Proceedings of SPIE: 22nd Congress of the International Commission for Optics: Light for the Development of the World (Puebla, Mexico 15-19 August, 2011)
- Publisher Link
- http://dx.doi.org/10.1117/12.903430
- Publisher
- SPIE
- Resource Type
- conference paper
- Date
- 2011
- Description
- 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.
- Subject
- off-axis parabolic reflectors; afocal relay; scanning
- Identifier
- http://hdl.handle.net/1959.13/1037596
- Identifier
- uon:13451
- Identifier
- ISBN:9780819485854
- Rights
- Copyright 2011 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
- Language
- eng
- Full Text
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