Off-axis parabolic optical relays: almost perfect imaging | Zendy

John Holdsworth | Zendy; Galiya Sharafutdinova | Zendy; Michael J. Sanderson | Zendy; Dirk van Helden | Zendy

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Off-axis parabolic optical relays: almost perfect imaging

Author(s) -

John Holdsworth,

Galiya Sharafutdinova,

Michael J. Sanderson,

Dirk van Helden

Publication year - 2011

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.903430

Subject(s) - parabola , wavefront , optics , parabolic reflector , physics , optical axis , distortion (music) , image resolution , point (geometry) , field of view , deformable mirror , computer science , geometry , mathematics , optoelectronics , amplifier , cmos , lens (geology)

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

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