Recursive relations for ray-tracing through three-dimensional reflective confocal prolate spheroids.

Details Recursive relations for ray-tracing through three-dimensional reflective confocal prolate spheroids. Recursive relations for ray-tracing through three-dimensional reflective confocal prolate spheroids.

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997rmxf...43..875p&link_type=abstract

Revista Mexicana de Fisica, Vol. 43, No. 6, p. 875 - 886

Physics

Optics

Telescopes: Optical Design

Scientific paper

Modern, large telescopes incorporate segmented primary mirrors, with off-axis spheroidal shapes. Each off-axis mirror and the secondary mirror represent an off-axis optical system without an axis of symmetry and for which the paraxial optics does not apply. Simple, recursive ray-trace equations are presented that describe exactly a ray propagating through a series of coupled, confocal, prolate spheroids. Vector formulation using the ray direction cosines is employed for characterizing the ray propagation in different planes through the spheroid axis of symmetry.

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