# US 2014/0194954 A1 · Photoradiation device and photoradiation therapy/prophylaxis device comprising same

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- Number: US 2014/0194954 A1
- Document ID: US20140194954A1
- Status: Published application
- Kind: A1
- Application number: 14/238,505
- Filed: 2012-08-22
- Published: 2014-07-10
- Earliest claimed: 2011-09-02
- Assignees: Panasonic Corporation
- Inventors: Kazuhiro Daijo
- Web page: https://patentgrep.com/patent/US20140194954A1

## CPC

- A61N 5/06: using light
- A61N 2005/063: {comprising light transmitting means, e.g. optical fibres}
- A61N 2005/0644: {Handheld applicators}
- A61N 2005/0665: {Reflectors}
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)

## Abstract

A photoradiation device of the present invention includes a light emitting unit that radiates radiation light; a reflection unit that reflects the radiation light; and a light guide unit that guides the reflected radiation light to an irradiation target body. The light guide unit includes a first light guide face and a second light guide face. The reflection unit includes a first reflection unit that reflects a part of the radiation light to the first light guide face, a second reflection unit that reflects entering light to the second light guide face, and a third reflection unit formed of a main body part provided with a transmission unit which reflects a part of remainder of the radiation light to the second reflection unit as the entering light. The third reflection unit is disposed with a transmission unit side inclined toward a light emitting unit such that the shorter a distance of the transmission unit to the light emitting unit, the larger an amount of transmission light of the radiation light. Thus, a photoradiation device that irradiates a plurality of irradiated faces with a single light emitting unit is achieved.

## Claims

### Claim 1

A photoradiation device comprising:
a light emitting unit that radiates radiation light;
a reflection unit that reflects the radiation light; and
a light guide unit that guides the radiation light reflected from the reflection unit to an irradiation target body,
wherein the light guide unit includes a first light guide face and a second light guide face that faces the first light guide face,
the reflection unit includes a first reflection unit that reflects a part of the radiation light to the first light guide face, a second reflection unit that reflects entering light to the second light guide face, and a third reflection unit formed of a main body part provided with a transmission unit which reflects a part of remainder of the radiation light to the second reflection unit as the entering light, and
the third reflection unit is disposed with a transmission unit side inclined toward a light emitting unit such that the shorter a distance of the transmission unit to the light emitting unit the larger an amount of transmission light of the radiation light.

### Claim 2 (depends on 1)

The photoradiation device of claim 1, wherein the third reflection unit is formed of a flat reflection plate.

### Claim 3 (depends on 1)

The photoradiation device of claim 1, wherein the transmission unit is a notch whose opening area increases with decrease in distance to the light emitting unit.

### Claim 4 (depends on 1)

The photoradiation device of claim 1, wherein the transmission unit is a slit whose opening area increases with decrease in distance to the light emitting unit.

### Claim 5 (depends on 1)

A photoradiation therapy/prophylaxis device for carrying out treatment or prevention by irradiating a specific site of a living body with radiation light radiated from a photoradiation device of claim 1, further comprising
a wavelength transmitting unit which is disposed on an optical path of the radiation light radiated from the light emitting unit through the light guide unit, and allows radiation light in a wavelength range of not less than 566.5 nm and not more than 780 nm in the radiation light radiated from the light emitting unit,
wherein a specific site of a living body is irradiated with the radiation light which is allowed to transmit through the wavelength transmitting unit.