An optical system includes a first optical element including a refractive surface convex to an enlargement side, a second optical element including a catadioptric surface convex to the enlargement side, a third optical element including a reflective surface of a concave shape with respect to light incident thereon, and a fourth optical element that is a refractive element having positive power, wherein light from the enlargement side travels to a reduction side via the refractive surface, a reflective region of the catadioptric surface, the refractive surface, the reflective surface, the refractive surface, a refractive region of the catadioptric surface, and the fourth optical element in succession, and wherein a medium between the refractive surface and the reflective surface has a refractive index lower than that of the first optical element.
OPTICAL SYSTEM INCLUDING REFRACTIVE SURFACE AND REFLECTIVE SURFACE, AND IMAGING APPARATUS AND PROJECTION APPARATUS INCLUDING THE SAME
31.01.2019
Patent
Elektronische Ressource
Englisch
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL |
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