VARIABLE MAGNIFICATION OPTICAL SYSTEM AND IMAGING APPARATUS

• Main Authors: IKEDA SHINKICHI, KUNUGISE TAKASHI, KOMATSU HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2022
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

To provide a variable magnification optical system which is downsized and has good optical performance, and an imaging apparatus comprising the variable magnification optical system.SOLUTION: A variable magnification optical system comprises: a first lens group having positive refractive power, a plurality of lens groups, and a final lens group having positive refractive power arranged in order from the object side to the image side. Upon changing of magnification, a distance between the first lens group and a lens group located on the most object side, of the plurality of lens groups changes, all distances between all adjacent lens groups of the plurality of lens groups change, and a distance between a lens group located on the most image side, of the plurality of lens groups and the final lens group change.SELECTED DRAWING: Figure 1 【課題】小型化が図られ、良好な光学性能を有する変倍光学系、およびこの変倍光学系を備えた撮像装置を提供する。【解決手段】変倍光学系は、物体側から像側へ順に、正の屈折力を有する第１レンズ群と、複数のレンズ群と、正の屈折力を有する最終レンズ群とからなる。変倍の際、第１レンズ群と複数のレンズ群のうち最も物体側のレンズ群との間隔が変化し、複数のレンズ群内の隣接するレンズ群の全ての間隔が変化し、複数のレンズ群のうち最も像側のレンズ群と最終レンズ群との間隔が変化する。【選択図】図１