# US 10,945,792 B2 · Laser system and method

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- Number: US 10,945,792 B2
- Document ID: US10945792B2
- Status: Granted
- Kind: B2
- Application number: 16/106,375
- Filed: 2018-08-21
- Published: 2020-02-27
- Granted: 2021-03-16
- Earliest claimed: 2018-08-21
- Applicants: Zlasers Ltd.
- Inventors: Ziv Karni
- Web page: https://patentgrep.com/patent/US10945792B2

## CPC

- A61B 18/203: {applying laser energy to the outside of the body}
- A61B 2017/00756: {Port wine stains}
- A61B 2017/00769: {Tattoo removal}
- A61B 2018/00452: {Skin}
- A61B 2018/0047: {Upper parts of the skin, e.g. skin peeling or treatment of wrinkles}
- A61B 2018/00642: {with feedback, i.e. closed loop control}
- A61B 2018/2065: {Multiwave; Wavelength mixing, e.g. using four or more wavelengths}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A method for pigment removal from skin includes sensing properties of a pigmented area of skin with a camera, communicating the properties to a controller, and sending commands from the controller to a laser system to scan the pigmented area in a random pattern with laser beams of different wavelengths in accordance with the properties so as to remove a portion of pigment from the pigmented area.

## Claims

### Claim 1

A method for pigment removal from skin comprising:
sensing properties of a pigmented area of skin with a camera;
communicating said properties to a controller;
sending commands from said controller to a laser system to scan said pigmented area in a random pattern with laser beams of different wavelengths in accordance with said properties so as to remove a portion of pigment from said pigmented area; and
scanning said pigmented area with multiple laser beams of different wavelengths emanating from multiple directions and directed to a single focal spot.

### Claim 2 (depends on 1)

The method according to claim 1, wherein said properties comprise color and boundaries of said pigmented area.

### Claim 3 (depends on 1)

The method according to claim 1, wherein said camera senses fiducial marks associated with said pigmented area, and if during scanning said pigmented area moves relative to said fiducial marks, causing said laser beams to move such that said laser beams impinge on said pigmented area.

### Claim 4 (depends on 1)

The method according to claim 1, wherein sending commands comprises commanding a first laser to emit a laser beam with a first wavelength on said pigmented area, and if a predefined color threshold target or a predefined maximum allowable skin temperature is reached with said first laser, then ceasing output of said first laser and switching to another laser with a different wavelength.

### Claim 5 (depends on 1)

The method according to claim 1, comprising cooling said pigmented area before, during or after scanning with said laser beams.

### Claim 6 (depends on 1)

The method according to claim 1, wherein said pigmented area comprises a tattoo.

### Claim 7 (depends on 1)

The method according to claim 1, wherein said random pattern of laser beams of different wavelengths does not apply said laser beams on adjacent spots on said area of the skin.

### Claim 8 (depends on 1)

The method according to claim 1, further comprising increasing a repetition rate of laser pulses from said laser system and simultaneously using said repetition rate of laser pulses to reduce pain.