Re-imaging optical system including refractive and diffractive optical elements
First Claim
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1. A re-imaging optical system comprising:
- an objective including a primary and secondary mirror, said primary and secondary mirrors having conic or higher order aspheric surfaces, said primary mirror receiving and projecting a radiation beam of a viewed object, said secondary mirror positioned to receive and reflect said radiation beam from said primary mirror, said primary mirror forming an intermediate image of said viewed object;
a relay means including a refractive optical element and a diffractive optical element positioned to receive said radiation beam from said secondary mirror to re-image said intermediate image onto an image plane.
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Abstract
A re-imaging optical system (10) has a ref lective objective (12) providing an intermediate image of the object being viewed and a relay (14) including refractive (32, 62) and diffractive (34, 72) optical elements. The system is capable of re-imaging the intermediate image onto an image plane (16) with the characteristic advantages of reflective and refractive systems while eliminating their deficiencies.
49 Citations
11 Claims
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1. A re-imaging optical system comprising:
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an objective including a primary and secondary mirror, said primary and secondary mirrors having conic or higher order aspheric surfaces, said primary mirror receiving and projecting a radiation beam of a viewed object, said secondary mirror positioned to receive and reflect said radiation beam from said primary mirror, said primary mirror forming an intermediate image of said viewed object; a relay means including a refractive optical element and a diffractive optical element positioned to receive said radiation beam from said secondary mirror to re-image said intermediate image onto an image plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification