To provide an optical system that has a sufficient brightness and resolution although it is a small-sized optical system.SOLUTION: An optical system comprises: a first optical element G1 that includes a convex-shape first reflection area G1M toward an enlargement side, and a second optical element G2 that includes a convex-shape second reflection area G2M toward the enlargement side. Light from the enlargement side proceeds to a contraction side via the second reflection area G2M, the first reflection area G1M, and a refractive area G2T of the second optical element G2 in this sequence. The first reflection area G1M is arranged only on one side (+Y side) with respect to an optical axis A in a first cross section (YZ cross section) including the optical axis A, and the second reflection area G2M includes a reflection part that reflects one part of the light, and a light block part that blocks one part of the light. A diameter of the reflection part in a first direction (X direction) perpendicular to the first cross section is larger than that of the reflection part in a second direction (Y direction) perpendicular to the optical axis A and the first direction.SELECTED DRAWING: Figure 1
【課題】 小型でありながら十分な明るさ及び解像度を有する光学系を提供すること。【解決手段】 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第2反射領域G2Mを含む第2光学素子G2とを備え、拡大側からの光は、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を順に介して縮小側へ向かい、第1反射領域G1Mは、光軸Aを含む第1の断面(YZ断面)において、光軸Aに対して一方の側(+Y側)にのみ配置されており、第2反射領域G2Mは、光の一部を反射する反射部と、光の一部を遮光する遮光部とを含み、第1の断面に垂直な第1の方向(X方向)における反射部の径は、光軸A及び第1の方向に垂直な第2の方向(Y方向)における反射部の径よりも大きい。【選択図】 図1
OPTICAL SYSTEM, IMAGING DEVICE INCLUDING THE SAME, AND PROJECTION DEVICE INCLUDING THE SAME
光学系、それを備える撮像装置及び投影装置
2019-03-22
Patent
Electronic Resource
Japanese
IPC: | G03B APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM , Geräte oder Anordnungen zum Aufnehmen, Projizieren oder Betrachten von Fotografien / 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 |
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