Fast folded wide angle large reflective unobscured system

Details Fast folded wide angle large reflective unobscured system Fast folded wide angle large reflective unobscured system

G - Physics

02

B

G02B 17/06 (2006.01) G02B 13/06 (2006.01) G02B 23/06 (2006.01)

Patent

CA 2110968

A wide angle large reflective unobscured system (10) has a primary (12), secondary (14), tertiary (18) and fold (16) mirror. The primary (12) and secondary (14) mirrors act as a non-reimaging afocal telescope of the Galilean type and relay a virtual entrance pupil to the fold mirror (16) which is positioned at the system aperture stop. The fold mirror (16) directs the energy to the tertiary mirror (18) which acts to direct and focus the energy at a viewing plane. The resulting telescope provides a wide two dimensional field of view which can exceed 20° x 40°, and operates at optical speeds about F/1Ø

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