Light emitting sealed body, light source device, and method for driving light emitting sealed body

Patent metadata

Field	Value
Publication number	US-2023104797-A1
Application number	US-202217956186-A
Country	US
Kind code	A1
Filing date	Sep 29, 2022
Priority date	Oct 4, 2021
Publication date	Apr 6, 2023
Grant date	—

Abstract

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space; a first window portion which is provided to the housing and on which first light that is laser light for maintaining a plasma generated in the light-emitting gas is incident; a second window portion provided to the housing and from which second light that is light from the plasma is emitted; and a getter portion including a getter material and disposed in an irradiation region of the first light inside the housing.

First claim

What is claimed is:

1 . A light emitting sealed body comprising:
a housing containing light-emitting gas in an internal space; a first window portion provided to the housing and on which first light is incident, wherein the first light is laser light for maintaining a plasma generated in the light-emitting gas; a second window portion provided to the housing and from which second light is emitted, wherein the second light is light from the plasma; and a getter portion including a getter material and disposed in an irradiation region of the first light inside the housing.

2 . The light emitting sealed body according to claim 1 ,
wherein the getter portion further includes a support member supporting the getter material.

3 . The light emitting sealed body according to claim 2 ,
wherein the getter portion is disposed such that the getter material faces a side opposite the first window portion.

4 . The light emitting sealed body according to claim 2 ,
wherein the getter portion is disposed such that the support member is irradiated with the first light.

5 . The light emitting sealed body according to claim 2 ,
wherein a melting point of the support member is higher than a melting point of the getter material.

6 . The light emitting sealed body according to claim 2 ,
wherein a thermal conductivity of the support member is higher than a thermal conductivity of the getter material.

7 . The light emitting sealed body according to claim 1 ,
wherein the getter portion is disposed such that the getter material faces an inner surface of the housing, the inner surface facing the first window portion.

8 . The light emitting sealed body according to claim 1 ,
wherein the getter portion is disposed to define a space between the getter portion and an inner surface of the housing.

9 . The light emitting sealed body according to claim 1 ,
wherein an exhaust hole for discharging gas from the internal space to an outside is formed in the housing, and the getter portion is disposed between a generation position of the second light and the exhaust hole in the internal space.

10 . The light emitting sealed body according to claim 1 ,
wherein a distance from the getter material to a generation position of the second light is longer than a distance from the generation position of the second light to the first window portion.

11 . The light emitting sealed body according to claim 1 ,
wherein the getter material is fixed to an inner surface of the housing.

12 . The light emitting sealed body according to claim 1 ,
wherein an inner surface of the housing includes an inner peripheral surface extending with a straight line parallel to an optical axis of the first light as a center line, and the getter material is fixed to the inner peripheral surface.

13 . The light emitting sealed body according to claim 1 ,
wherein the getter material is configured as a non-evaporable type.

14 . The light emitting sealed body according to claim 1 ,
wherein the getter material is configured as an evaporable type.

15 . The light emitting sealed body according to claim 1 ,
wherein at least one of the first window portion and the second window portion includes a window member made of a material containing diamond.

16 . The light emitting sealed body according to claim 1 ,
wherein the housing is made of a metal material.

17 . The light emitting sealed body according to claim 1 , further comprising:
a first electrode and a second electrode facing each other with a generation position of the second light interposed between the first electrode and the second electrode.

18 . The light emitting sealed body according to claim 1 ,
wherein a charging pressure of the light-emitting gas in the housing is 3 MPa or more.

19 . A light source device comprising:
the light emitting sealed body according to claim 1 ; and a light introduction unit that causes the first light to be incident on the first window portion.

20 . A method for driving a light emitting sealed body including a housing containing light-emitting gas in an internal space, on which first light that is laser light for maintaining a plasma generated in the light-emitting gas is incident and from which second light that is light from the plasma is emitted, and a getter portion including a getter material and being disposed in an irradiation region of the first light inside the housing, the method comprising:
activating the getter material by irradiating the getter material with the first light; and generating the plasma in the light-emitting gas and emitting the second light.

Assignees

• Hamamatsu Photonics Kk

Inventors

• Suzuki Akio
• Fujita Toru
• Ohba Shinichi
• ASAI Akinori
• Nakazawa Tomoya
• Morimoto Taiga

Classifications

• H01J65/04 Primary

  Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating {plasma display panels} · CPC title

• H01J61/26 Primary

  Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope · CPC title

• H01J65/042

  by an external electromagnetic field · CPC title

• H01J61/16

  having helium, argon, neon, krypton, or xenon as the principle constituent · CPC title

• H01J61/12

  Selection of substances for gas fillings; Specified operating pressure or temperature · CPC title