OPTICAL SYSTEM AND IMAGE CAPTURING DEVICE

• Main Authors: FUKUDA KOICHI, MIZUNO NOBUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 10.11.2022
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

To provide an optical system capable of reducing ring blur when a catoptric system is used.SOLUTION: An optical system provided herein comprises a catoptric system (601B, 601C) and an optical adjustment layer (401) including a transmittance distribution layer or reflectance distribution layer that is rotationally symmetric about an optical axis (OA), where the optical adjustment layer (401) has the maximum transmittance or reflectance (Tmax or Rmax) at a position different from the optical axis (OA).SELECTED DRAWING: Figure 2 【課題】反射光学系を用いた場合にリングボケを低減することが可能な光学系を提供する。【解決手段】光学系は、反射光学系（６０１Ｂ、６０１Ｃ）と、光軸（ＯＡ）を中心として回転対称な透過率分布層または反射率分布層を含む光学調整層（４０１）とを有し、光学調整層（４０１）は、光軸（ＯＡ）とは異なる位置で透過率または反射率の極大値（Ｔｍａｘ、Ｒｍａｘ）を有する。【選択図】図２