To provide an optical system having high imaging performance while being small in size.SOLUTION: An optical system 100 includes a first optical element G1 including a first reflective region G1M having a convex shape toward an enlargement side, a second optical element G2 having a reduction side surface having a convex shape toward the enlargement side, and a third optical element G3 having an enlargement side surface having a convex shape toward the enlargement side. The reduction side surface of the second optical element G2 or the enlargement side surface of the third optical element G3 includes a second reflective region G2M, and the third optical element G3 includes a refractive region G3T having a positive power. Light from the enlargement side proceeds toward the reduction side successively through a refractive region G1T of the first optical element G1, the second reflective region G2M, the first reflective region G1M, a refractive region G2T of the second optical element G2, and the refractive region G3T of the third optical element G3.SELECTED DRAWING: Figure 1
【課題】 小型でありながら高い結像性能を有する光学系を提供すること。【解決手段】 光学系100は、拡大側に向かって凸形状の第1反射領域G1Mを含む第1光学素子G1と、拡大側に向かって凸形状の縮小側面を有する第2光学素子G2と、拡大側に向かって凸形状の拡大側面を有する第3光学素子G3とを備え、第2光学素子G2の縮小側面又は第3光学素子G3の拡大側面は第2反射領域G2Mを含み、第3光学素子G3は、正のパワーの屈折領域G3Tを含み、拡大側からの光は、第1光学素子G1の屈折領域G1T、第2反射領域G2M、第1反射領域G1M、第2光学素子G2の屈折領域G2T、及び第3光学素子G3の屈折領域G3Tを順に介して縮小側へ向かう。【選択図】 図1
OPTICAL SYSTEM, AND IMAGING APPARATUS AND PROJECTION APPARATUS INCLUDING THE SAME
光学系、それを備える撮像装置及び投影装置
2019-02-21
Patent
Electronic Resource
Japanese
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01C Messen von Entfernungen, Höhen, Neigungen oder Richtungen , MEASURING DISTANCES, LEVELS OR BEARINGS / G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien |
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