公开(公告)号：US20130147992A1

公开(公告)日：2013-06-13

申请号：US13675272

申请日：2012-11-13

Applicant: HOYA CORPORATION

Inventor： Masaru EGUCHI

IPC: G02B15/14 ,  H04N5/262

CPC classification number: G02B15/14 ,  G02B15/177 ,  H04N5/262

Abstract: A zoom lens system includes a negative first lens group, positive second and third lens groups, wherein upon zooming from the short to the long focal length extremities, the distance between the first and second lens groups decreases and the distance between the second and third lens groups changes. The second lens group includes a biconvex positive lens element with an aspherical surface on each side, and a negative meniscus lens element with an aspherical surface, and a concave surface on the image side. The following condition (1) is satisfied: 5

Abstract translation: 变焦透镜系统包括负的第一透镜组，正的第二和第三透镜组，其中当从短焦距长焦距变焦时，第一和第二透镜组之间的距离减小，并且第二和第三透镜之间的距离 组更改。 第二透镜组包括在每一侧上具有非球面的双凸正透镜元件和具有非球面的负弯月形透镜元件和图像侧的凹面。 满足以下条件（1）：5

公开(公告)号：US20210048665A1

公开(公告)日：2021-02-18

申请号：US16991411

申请日：2020-08-12

Applicant: HOYA CORPORATION

Inventor： Toshiki NAKAMURA ,  Masaru EGUCHI ,  Yutaka TAKAKUBO ,  Yoshitake TANNO ,  Naomi MATSUMOTO

IPC: G02B27/00 ,  G02B1/11 ,  G02B5/00

Abstract: An optical element includes a glass body including a colored layer provided inside the glass body and positioned outside an effective aperture of the optical element. An optical apparatus including the optical element is also provided.

公开(公告)号：US20130176478A1

公开(公告)日：2013-07-11

申请号：US13675252

申请日：2012-11-13

Applicant: HOYA CORPORATION

Inventor： Masaru EGUCHI

IPC: G02B15/14 ,  H04N5/232

CPC classification number: G02B15/14 ,  G02B15/177 ,  H04N5/23212

Abstract: A zoom lens system includes a negative first lens group, positive second and third lens groups, wherein upon zooming from the short to long focal length extremities, the distance between the first and second lens groups decreases and the distance between the second and third lens groups changes. The second lens group includes a biconvex positive lens element with an aspherical surface on each side, and a negative meniscus lens element with an aspherical surface, and a concave surface on the image side. Conditions (1) and (2) are satisfied: νd>80   (1), and Pg_F>0.53   (2), wherein νd designates the Abbe number at the d-line of the biconvex positive lens element within the second lens group, and Pg_F designates the partial dispersion ratio of the biconvex positive lens element within the second lens group.

Abstract translation: 变焦透镜系统包括负的第一透镜组，正的第二和第三透镜组，其中当从短焦距长焦距变焦时，第一和第二透镜组之间的距离减小，第二和第三透镜组之间的距离 变化。 第二透镜组包括在每一侧上具有非球面的双凸正透镜元件和具有非球面的负弯月形透镜元件和图像侧的凹面。 条件（1）和（2）：nud> 80（1）和Pg_F> 0.53（2），其中nud表示第二透镜组内的双凸正透镜元件的d线上的阿贝数， Pg_F表示第二透镜组中的双凸正透镜元件的部分色散比。