# US 8,540,757 B2 · Phototherapy apparatus using excimer radiation

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- Number: US 8,540,757 B2
- Document ID: US8540757B2
- Status: Granted
- Kind: B2
- Application number: 11/610,130
- Filed: 2006-12-13
- Published: 2007-06-14
- Granted: 2013-09-24
- Earliest claimed: 2005-12-13
- Assignees: Ushiodenki Kabushiki Kaisha
- Applicants: Taku Sumitomo; Tatumi Hiramoto; Akimichi Morita
- Inventors: Taku Sumitomo; Tatumi Hiramoto; Akimichi Morita
- Web page: https://patentgrep.com/patent/US8540757B2

## CPC

- H01J 65/046: {the field being produced by using capacitive means around the vessel}
- A61N 5/0616: {Skin treatment other than tanning}
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)
- 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 phototherapy device using excimer radiation in which, by skillful use of the individual peak wavelength of 308 nm and of the emission range of shorter wavelengths than 308 nm, the therapy effect is enhanced, and in which, at the same time, harm can be reduced is achieved using a XeCl excimer lamp and in which diseased sites of skin disorders are irradiated with UV-B radiation with an optical filter being used for changing the spectral shape of the UV-B radiation with which the diseased sites are irradiated.

## Claims

### Claim 1

Phototherapy device using excimer radiation, comprising:
a dielectric barrier discharge XeCl excimer lamp which radiates in the wavelength range of 270 nm to 320 nm for irradiation of diseased sites afflicted by a skin disorder with UV-B radiation, and
an optical filter unit comprising at least one optical filter having a transmittance of 0% below a wavelength of 280 nm for changing the wavelength range and shape of the spectrum of the UV-B radiation with which the diseased sites are irradiated.

### Claim 2 (depends on 1)

Phototherapy device using excimer radiation in accordance with claim 1, wherein the optical filter unit has several optical filters which can be selectively arranged in a beam path to change the shape of the spectrum of the UV-B radiation.

### Claim 3 (depends on 2)

Phototherapy device using excimer radiation in accordance with claim 2, wherein the several optical filters are made of the same material but differ in their thickness.

### Claim 4 (depends on 3)

Phototherapy device using excimer radiation in accordance with claim 3, wherein the optical filters are made of borosilicate glass.

### Claim 5 (depends on 2)

Phototherapy device using excimer radiation in accordance with claim 2, wherein each of the several filters transmits a different wavelength.

### Claim 6 (depends on 1)

Phototherapy device using excimer radiation in accordance with claim 1, wherein the at least one optical filter is selected from an assortment of several optical filters provided externally of the phototherapy device and is used for changing the shape of the spectrum of the UV-B radiation.

### Claim 7 (depends on 1)

Phototherapy device using excimer radiation in accordance with claim 1, wherein the optical filter unit has a receiving area for holding the at least one optical filter from an assortment of several optical filters.

### Claim 8 (depends on 1)

Phototherapy device using excimer radiation in accordance with claim 1, wherein the optical filter unit has a receiving area for holding the at least one optical filter from an assortment of several optical filters and wherein the several optical filters are made of the same material but differ in their thickness.

### Claim 9 (depends on 8)

Phototherapy device using excimer radiation in accordance with claim 8, wherein the optical filters are made of borosilicate glass.

### Claim 10 (depends on 1)

Phototherapy device using excimer radiation in accordance with claim 1, further comprising a device for controlling the amount of irradiation by changing an irradiation time according to the type of optical filter.