本公开的光学系统从物体侧向像面侧依次具备:第1透镜群,作为群整体而具有正的折射力,从物体侧向像面侧依次具有第1负弯月透镜和第2负弯月透镜;以及第2透镜群,作为群整体而具有正的折射力,在调焦时群整体在光轴上移动,最靠物体侧的面设为向物体侧凸的形状,满足以下的条件式。0<1……(1),其中,R2f设为第2透镜群的最靠物体侧的面的曲率半径,R2r设为第2透镜群的最靠像面侧的面的曲率半径。
An optical system according to the present disclosure is provided with, in the following order from the object side to the image surface side: a first lens group that has a positive refractive power as an entire group, and includes a first negative meniscus lens and a second negative meniscus lens in this order from the object side to the image surface side; and a second lens group that has a positive refractive power as an entire group and moves as an entire group on the optical axis during focusing, with the surface thereof closest to the object side having a shape protruding toward the object side. The optical system satisfies the following conditional expression. (1): 0<1 where, R2f is the radius of curvature of the surface of the second lens group closest to the object side, and R2r is the radius of curvature of the surface of the second lens group closest to the imaging surface side.
光学系统以及摄像装置
2024-03-29
Patent
Elektronische Ressource
Chinesisch