An optical system includes a first optical element including a first reflecting region having a convex shape toward an enlargement side, a second optical element having a reduction-side surface having a convex shape toward the enlargement side, and a third optical element having an enlargement-side surface having a convex shape toward the enlargement side, wherein the reduction-side surface of the second optical element or the enlargement-side surface of the third optical element includes a second reflecting region, wherein the third optical element includes a refracting region having positive power, and wherein light from the enlargement side proceeds to a reduction side sequentially through a refracting region of the first optical element, the second reflecting region, the first reflecting region, a refracting region of the second optical element, and the refracting region of the third optical element.
Optical system having refracting surface and reflecting surface, and image capturing apparatus and projection apparatus including the same
2021-01-19
Patent
Electronic Resource
English
European Patent Office | 2019
|European Patent Office | 2019
|OPTICAL SYSTEM, AND IMAGING APPARATUS AND PROJECTION APPARATUS INCLUDING THE SAME
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|PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTION DEVICE HAVING SAME
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|European Patent Office | 2021
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