Back to results
US 2023/0352285 A1Published application
Photoelectric tube
AssigneeHamamatsu Photonics K.K.
InventorsTsuyoshi KODAMA, Masaki YAMADA, Shinichi HARA, Naoki UMEBAYASHI
Life of this patent
Estimating the term…
Abstract
A photoelectric tube includes a housing including a light transmitting portion, an electron emitting portion held by a recess provided in the housing, the electron emitting portion including a concave photoelectric surface facing a light transmitting portion side inside the housing, and an electron capturing portion disposed between the light transmitting portion and the photoelectric surface inside the housing. At least a part of the electron capturing portion is located inside a region on an inside of the photoelectric surface.
Claims8
1:
- A photoelectric tube comprising:
- a housing including a light transmitting portion;
- an electron emitting portion held by a recess provided in the housing, the electron emitting portion including a concave photoelectric surface facing the light transmitting portion side inside the housing;
- and
- an electron capturing portion disposed between the light transmitting portion and the photoelectric surface inside the housing,
- wherein at least a part of the electron capturing portion is located inside a region on an inside of the photoelectric surface.
3 more elements
2:
- The photoelectric tube according to claim 1, wherein:
- the photoelectric surface includes a bottom surface and a side surface;
- and
- the side surface is curved such that an inclination increases as a distance from the bottom surface increases.
1 more element
3:
- The photoelectric tube according to claim 1,
- wherein the photoelectric surface has a circular shape when viewed from the light transmitting portion side.
4:
- The photoelectric tube according to claim 1, wherein the electron capturing portion is a plate-shaped member, and is disposed to divide a region inside the housing when viewed from the light transmitting portion side.
5:
- The photoelectric tube according to claim 1, wherein:
- the housing further includes a main body having the recess;
- the light transmitting portion is attached to the main body to close an opening of the recess;
- and
- the electron emitting portion and the electron capturing portion are supported by the main body.
2 more elements
6:
- The photoelectric tube according to claim 5, wherein:
- the electron emitting portion is disposed on an inner surface of the recess;
- and
- the electron capturing portion bridges over an opening edge of the recess.
1 more element
7:
- The photoelectric tube according to claim 5, further comprising a conductive portion electrically connected to the electron capturing portion,
- wherein a part of the conductive portion and a part of the electron emitting portion are exposed to an outside on a surface of the main body on an opposite side from the light transmitting portion.
8:
- The photoelectric tube according to claim 1, further comprising a conductive layer disposed along the light transmitting portion to face the photoelectric surface inside the housing and configured to allow light to pass therethrough.