公开(公告)号：US20230290605A1

公开(公告)日：2023-09-14

申请号：US18020989

申请日：2021-06-09

Applicant: HAMAMATSU PHOTONICS K.K. ,  NuFlare Technology, Inc.

Inventor： Tomohiko HIRANO ,  Hiroyuki TAKETOMI ,  Motohiro SUYAMA ,  Wataru MATSUDAIRA ,  Akihiro KAGEYAMA ,  Kota IWASAKI ,  Taku YAMADA

IPC: H01J37/06 ,  H01J37/10

CPC classification number: H01J37/06 ,  H01J37/10 ,  H01J2237/026

Abstract: A photoelectric surface electron source includes a glass substrate configured to receive laser light incident from a substrate back surface to emit the laser light from a substrate main surface, a photoelectric surface provided on the substrate main surface and configured to receive the laser light and emit a photoelectron, a lens array disposed on the substrate back surface and including a plurality of microlenses for condensing the laser light toward the photoelectric surface, and a light shielding portion provided on the glass substrate. The light shielding portion has a back surface-side light shielding layer provided on a back surface-side light shielding surface interposed between the plurality of microlenses on the substrate back surface, and a main surface-side light shielding layer provided on a main surface-side light shielding surface.

公开(公告)号：US20230343541A1

公开(公告)日：2023-10-26

申请号：US18021457

申请日：2021-06-09

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tomohiko HIRANO ,  Hiroyuki TAKETOMI ,  Motohiro SUYAMA ,  Wataru MATSUDAIRA ,  Akihiro KAGEYAMA ,  Kota IWASAKI ,  Taku YAMADA

IPC: H01J1/34 ,  H01J1/88

CPC classification number: H01J1/34 ,  H01J1/88

Abstract: A photoelectric-surface electron source includes: a glass substrate that receives laser light from a substrate light-receiving surface including microlenses and that focuses the laser light toward a substrate main surface located on the opposite side from the substrate light-receiving surface; a photoelectric surface that is provided to the substrate main surface, and that receives the focused laser light and emits photoelectrons; and an extraction electrode that is fixed to the substrate main surface and that extracts the photoelectrons from the photoelectric surface. The extraction electrode is disposed away from the photoelectric surface along the normal direction of the substrate main surface and has: an electrode part in which electrode holes for allowing the photoelectrons to pass therethrough are provided; and a frame part that is fixed to a region surrounding the photoelectric surface in the substrate main surface.