Catoptric anastigmatic afocal optical system
Abstract
Abstract A CATOPTRIC ANASTIGMATIC AFOCAL OPTICAL SYSTEM IS FORMED BY TWO CONCAVE PARABOLOIDAL REFLECTORS OF DIFFERENT POWERS AND A CONVEX HYPERBOLOIDAL REFLECTOR EACH ADAPTED TO RECEIVE AND FOCUS RADIANT ENERGY. A PARABOLOIDAL REFLECTOR AND THE HYPERBOLOIDAL REFLECTOR HAVE THEIR AXES OPTICALLY COINCIDENT AND ARE POSITIONED WITH THE REAL FOCUS OF THIS PARABOLOIDAL REFLECTOR AT THE VIRTUAL FOCUS OF THE HYPERBOLOIDAL REFLECTOR. THE AXIS OF THE OTHER PARABOLOIDAL REFLECTOR IS OPTICALLY COINCIDENT WITH THE AXIS OF THE HYPERBOLOIDAL REFLECTOR AND ITS REAL FOCUS IS COINCIDENT WITH THE REAL FOCUS OF THE COMBINATION OF THE FIRST PARABOLOIDAL REFLECTOR AND THE HYPERBOLOIDALL REFLECTOR. BY HAVING THE SUM OF THE POWERS OF ALL THE REFLECTOR. BY HAVING THE SUM ORDER ABERRATIONS EXCEPT DISTORTION ARE ZERO, IF THE SUM IS NOT ZERO, THIRD ORDER ABERRATIONS, OTHER THAN FIELD CURVATURE AND DISTORTION, ARE ZERO.
Inventors
- 👤 Abe Offner
Bibliographic Details
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