公开(公告)号：US20240319418A1

公开(公告)日：2024-09-26

申请号：US18611287

申请日：2024-03-20

申请人： CANON KABUSHIKI KAISHA

发明人： KUMIKO YASHIMA ,  HIDEO GENDA ,  KOUICHI YONETANI ,  HIROYUKI TANAKA

IPC分类号： G02B5/18

CPC分类号： G02B5/1823 ,  G02B5/1842 ,  G02B5/1895

摘要： A diffractive optical element includes: a substrate having a surface on which a diffraction grating is provided; and a resin layer provided on the surface of the substrate so as to cover the diffraction grating, wherein, in plan view as viewed along an optical axis direction, the diffraction grating includes: a first diffraction grating having a circular shape; and a second diffraction grating having an arc shape, the second diffraction grating being arranged on an outer side of the first diffraction grating, wherein the diffractive optical element includes an optical effective region and a non-optical effective region surrounding the optical effective region, wherein the second diffraction grating has an arc end positioned in the non-optical effective region, and wherein a thickness of the resin layer provided in the non-optical effective region is larger than a thickness of the resin layer provided in the optical effective region.

公开(公告)号：US20230305267A1

公开(公告)日：2023-09-28

申请号：US18186438

申请日：2023-03-20

申请人： CANON KABUSHIKI KAISHA

发明人： KUMIKO YASHIMA

IPC分类号： G02B9/10 ,  G02B13/00

CPC分类号： G02B9/10 ,  G02B13/006

摘要： An optical element including a first lens, a second lens, and an optical resin arranged between the lenses. The opposing surfaces of the first lens and the optical resin, and/or the opposing surfaces of the optical resin and the second lens are joined to each other with an adhesive resin having a specific elastic modulus. The first lens is a convex lens and the second lens is a concave lens. The thickness of the center of the optical resin is thicker than the thickness of the outer edge of the optical resin. The second lens has, on its outer periphery, a step structure thinner than the maximum thickness of the second lens. The thickness of the step structure and the thickness of the center of the optical resin satisfy a specific relationship.