| 摘要 |
The invention relates to an optical device for a system for presenting collimated images including an off-axis spherical mirror. The device has an additional aspherical mirror whose surface forms, in the plane of symmetry of the unfolded optical system, a curve whose radius of curvature is variable. The surface provides for correction of the image of a pupil of an eye given by the spherical mirror and the pupil image is rectified on the optical axis. The surface may be a paraboloid, an ellipsoid and it may exhibit symmetry of revolution.
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