OPTICAL SYSTEM AND IMAGING APPARATUS HAVING THE SAME

To obtain an optical system which is light and in which aberration such as chromatic aberration is satisfactorily corrected.SOLUTION: An optical system comprises a first lens group B1 having positive refractive power, a second lens group B2, and a third lens group B3 arranged in order from an object...

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Bibliographic Details
Main Authors SAITO SHINICHIRO, YAMAGISHI MASAKAZU, INOUE TAKU, NAKAHARA MAKOTO, MIZUMA AKIRA
Format Patent
LanguageEnglish
Japanese
Published 19.01.2024
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:To obtain an optical system which is light and in which aberration such as chromatic aberration is satisfactorily corrected.SOLUTION: An optical system comprises a first lens group B1 having positive refractive power, a second lens group B2, and a third lens group B3 arranged in order from an object side to an image side. When performing focusing, the second lens group B2 moves, and an interval between adjacent lens groups changes. The first lens group B1 comprises a positive lens G1p disposed on the most object side, and a negative lens G1n disposed on the most object side among all negative lenses belonging to the first lens group B1. The optical system satisfies predetermined conditions.SELECTED DRAWING: Figure 1 【課題】 軽量であり、かつ色収差等の収差が良好に補正された光学系を得ること。【解決手段】 物体側より像側へ順に配置された、正の屈折力を有する第１レンズ群Ｂ１、第２レンズ群Ｂ２、第３レンズ群Ｂ３から構成される。フォーカシングに際して第２レンズ群Ｂ２が移動し、隣り合うレンズ群の間隔は変化する。第１レンズ群Ｂ１は、最も物体側に配置された正レンズＧ１ｐと、第１レンズ群Ｂ１に含まれる負レンズの中で最も物体側に配置された負レンズＧ１ｎを含む。光学系は所定の条件を満足する。【選択図】 図１
Bibliography:Application Number: JP20230199251