# US 8,540,702 B2 · Enhancing the brightness of optical radiation used in light-based dermatologic treatment systems

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- Number: US 8,540,702 B2
- Document ID: US8540702B2
- Status: Granted
- Kind: B2
- Application number: 12/056,612
- Filed: 2008-03-27
- Published: 2009-09-17
- Granted: 2013-09-24
- Earliest claimed: 2008-03-11
- Assignees: Shaser, Inc.
- Applicants: Doug Ely; Elias Behrakis; Daniel L. Roth
- Inventors: Doug Ely; Elias Behrakis; Daniel L. Roth
- Web page: https://patentgrep.com/patent/US8540702B2

## CPC

- A61B 18/203: {applying laser energy to the outside of the body}
- A61B 2018/00142: {lubricating}
- A61B 2018/00452: {Skin}
- A61B 2018/00458: {Deeper parts of the skin, e.g. treatment of vascular disorders or port wine stains}
- A61B 2018/0047: {Upper parts of the skin, e.g. skin peeling or treatment of wrinkles}
- A61B 2018/00476: {Hair follicles}
- A61B 2018/2261: {with scattering, diffusion or dispersion of light}
- A61N 2005/0651: {Diodes}
- A61N 2005/0654: {Lamps}
- A61N 2005/0659: {infrared}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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

Facilitating a dermatologic treatment by providing a light source emitting optical radiation and having a plurality of wavelengths, reflecting some of the emitted optical radiation back to the light source to enhance the brightness of the optical radiation, and applying at least some of the enhanced optical radiation to a skin surface to facilitate a dermatologic treatment.

## Claims

### Claim 1

A dermatologic treatment device, the device comprising:
a light source emitting optical radiation having at least a first set of wavelengths and a second set of wavelengths, the first set of wavelengths being preferred for a dermatologic treatment;
a first reflector arranged in a tubular shape, spatially separated from and substantially surrounding the light source, the first reflector reflecting some of the optical radiation exhibiting the second set of wavelengths back to the light source to enhance a brightness of the light source while allowing the optical radiation exhibiting the first set of wavelengths to pass;
a thermally conductive material disposed at least between and in thermal communication with the light source and the first reflector, the thermally conductive material facilitating a transfer of heat from the light source to the first reflector; and
a contact element in contact with a skin surface, at least some enhanced optical radiation from the-light source being conveyed through the contact element to facilitate the dermatologic treatment;
a contact sensor detecting contact between the contact element and the skin surface during the dermatologic treatment, the contact sensor enabling the light source to be energized in response to such detection; and
a handheld housing including a removable cartridge, the removable cartridge containing the light source, the thermally conductive material, and the first reflector.

### Claim 2 (depends on 1)

The device of claim 1, wherein the light source includes at least one flashlamp.

### Claim 3 (depends on 1)

The device of claim 1, wherein the light source includes at least one light-emitting diode.

### Claim 4 (depends on 1)

The device of claim 1, wherein the enhanced optical radiation includes wavelengths at least in the near infrared portion of an electromagnetic spectrum.

### Claim 5 (depends on 1)

The device of claim 1, further comprising: a second reflector reflecting at least some of the optical radiation exhibiting the first set of wavelengths towards the skin surface.

### Claim 6 (depends on 5)

The device of claim 5, wherein the second reflector is arranged in an ellipsoid shape.

### Claim 7 (depends on 5)

The device of claim 5, wherein the second reflector is arranged in a parabolic shape.

### Claim 8 (depends on 5)

The device of claim 5, wherein the contact element is optically transparent to the optical radiation exhibiting the first set of wavelengths.

### Claim 9 (depends on 5)

The device of claim 5, wherein the contact element includes a hydrophilic portion that facilitates the dermatologic treatment.

### Claim 10 (depends on 9)

The device of claim 9, wherein the hydrophilic portion diffuses the optical radiation conveyed by the contact element when such hydrophilic portion is exposed to water.

### Claim 11 (depends on 1)

The device of claim 1, further comprising: a timing circuit energizing the light source at predetermined intervals during the dermatologic treatment.

### Claim 12 (depends on 1)

The device of claim 1, further comprising: a vibrating element applying a vibration to the skin surface to reduce pain sensation during the dermatologic treatment.

### Claim 13 (depends on 1)

The device of claim 1, wherein the contact element is optically transparent to the optical radiation exhibiting the first set of wavelengths, and wherein the contact element applies a vibration to the skin surface to reduce pain sensation during the dermatologic treatment.