Infrared light radiation device

Patent metadata

Field	Value
Publication number	US-11710628-B2
Application number	US-201916577270-A
Country	US
Kind code	B2
Filing date	Sep 20, 2019
Priority date	Oct 5, 2018
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

An infrared light radiation device includes a radiation unit and a condenser. The radiation unit includes a heater and a metamaterial structure. The metamaterial structure is able to radiate, when heat energy is input from the heater, infrared light having a peak wavelength of a non-Planck distribution. The condenser includes at least one condensing lens that concentrates and transmits toward outside the infrared light radiated from the radiation unit.

First claim

What is claimed is:

1. An infrared light radiation device comprising:
a radiation unit that includes
a heater, and
a metamaterial structure that is able to radiate, when heat energy is input from the heater, infrared light having a peak wavelength of a non-Planck distribution; and

a condenser that includes at least one condensing lens that concentrates transmits toward outside the infrared light radiated from the radiation unit; and
a reflector that reflects to the condenser the infrared light radiated from the radiation unit;
wherein the metamaterial structure includes
a first metamaterial structure that radiates the infrared light from a first radiation surface, and
a second metamaterial structure that radiates the infrared light from a second radiation surface,
wherein the first metamaterial structure, the heater, and the second metamaterial structure are arranged in this order in a direction perpendicular to a direction in which the radiation unit and the condenser are arranged, and
wherein the first metamaterial structure and the second metamaterial structure are interposed between one and another sides of the reflector.

2. The infrared light radiation device according to claim 1 ,
wherein the reflector covers a region opposite the condenser relative to the radiation unit, and an end portion of the reflector extends further toward the condenser than the radiation unit so as to position the radiation unit inside the reflector.

3. The infrared light radiation device according to claim 1 ,
wherein a focal length of the at least one condensing lens is 100 mm or larger when collimated light is incident on the at least one condensing lens from a side at which the radiation unit is disposed.

4. The infrared light radiation device according to claim 1 ,
wherein the metamaterial structure includes
a first conductor layer,
a dielectric layer coupled to the first conductor layer, and
a second conductor layer that includes a plurality of individual conductor layers which are coupled to the dielectric layer and which are spaced from one another so as to be periodically disposed, and
wherein the first conductor layer, the dielectric layer, and the second conductor layer are arranged in this order from the heater.

5. The infrared light radiation device according to claim 1 ,
wherein the metamaterial structure has a plurality of micro-cavities spaced from one another so as to be periodically disposed, and at least a surface of each of the plurality of micro-cavities is formed of a conductor.

6. The infrared light radiation device according to claim 1 ,
wherein a reflection surface of the reflector has a curved shape in section.

Assignees

• Ngk Insulators Ltd

Inventors

• Kato Daiki
• Kondo Yoshio

Classifications

• H01K1/30 Primary

  incorporating lenses · CPC title

• H01K1/10

  Bodies of metal or carbon combined with other substance · CPC title

• H01K1/18

  Mountings or supports for the incandescent body · CPC title

• H05B3/0033

  Heating devices using lamps · CPC title

• G02B1/002

  made of materials engineered to provide properties not available in nature, e.g. metamaterials · CPC title