Applicator
Disclosed is an applicator or handpiece configured to apply treatment energy to a segment of skin located in a tissue or skin treatment plane. The treatment energy could be RF energy, applied by a pair of bipolar RF electrodes or optical energy. The applicator includes an optical system configured to form a rectangular spot and homogenize the optical energy distribution.
1 . An applicator with a skin cooling arrangement, comprising:
a housing and a support structure extending from distal end of the housing, the support structure includes at least one cooling fluid conducting channel;
a transparent window mounted on the support structure the window includes at least one cooling fluid conducting channel being in fluid communication with the at least one fluid conducting channel in the support structure; and
wherein the transparent window cools treated tissue area being in contact with the transparent window.
2 . The applicator according to claim 1 , further comprising a pair of bipolar RF electrodes mounted on the support structure and wherein a pair of bipolar RF electrodes is configured to apply RF energy to tissue located in tissue treatment plane.
3 . The applicator according to claim 1 , wherein an optical system configured to receive a beam of optical energy from a source of optical energy and convey it to tissue located in a tissue treatment plane and wherein a tissue treatment plane is located between a pair of bipolar RF electrodes.
4 . The applicator according to claim 1 , wherein cross section of the cooling fluid conducting channel made in the transparent window is one of a group consisting of a round, elliptical, oval and cross section having a relatively low fluid flow resistance.
5 . The applicator according to claim 1 , wherein the transparent window includes a hollow cavity being in fluid communication with fluid conducting channels made in the support structure.
6 . The applicator according to claim 1 , wherein the transparent window is made of at least one of a group of materials consisting of sapphire and quartz.
7 . The applicator according to claim 1 , wherein outer surface of the transparent window is in contact with tissue and defines the tissue treatment plane.
8 . The applicator according to claim 1 , wherein a source of optical energy provides optical energy with wavelength of 400 nm to 2000 nm.
9 . The applicator according to claim 1 , wherein a source of optical energy provides optical energy with fluence of 0.5 J/cm2 to 150 J/cm2.
10 . The applicator according to claim 1 , wherein the support structure is angled with respect to axis of symmetry of the applicator at an angle of 10 to 30 degrees.
11 . The applicator according to claim 1 , wherein the support structure is coaxial with axis of symmetry of the applicator.
12 . The applicator according to claim 1 wherein a cooling tip has a thermal resistance of less than 1 degree Celsius per Watt of heat load.
13 . The applicator according to claim 1 further including a light pipe homogenizing rod and wherein the rod is at least one of a group of light guides consisting of a tapered light homogenizing rod, a tapered optical trapezoidal prism, a tapered multi-facet optical homogenizing rod or a tapered hollow light guide with a reflective coating deposited on inner surfaces of the light guide.
14 . The applicator according to claim 13 wherein the applicator includes an optical system with a pair of lenses configured to receive a homogenized beam of optical energy from light pipe homogenizing rod and image output facet of light pipe homogenizing rod to a treated skin or tissue plane located between a pair of bipolar RF electrodes and wherein an output facet of light guide has an oval shape.
15 . The applicator according to claim 1 , wherein the applicator includes an optical system with a pair of lenses configured to receive a homogenized beam of optical energy from light pipe homogenizing rod and image output facet of light pipe homogenizing rod to a treated skin or tissue plane located between a pair of bipolar RF electrodes and wherein an output facet of light pipe homogenizing rod has a trapezoidal shape.
17 . The applicator according to claim 1 , wherein the support structure is angled with respect to axis of symmetry of the applicator at an angle of 10 to 30 degrees.
18 . The applicator according to claim 1 , wherein the support structure angled with respect to axis of symmetry facilitates to operator a good view of a treated tissue area.
19 . The applicator according to claim 1 , further comprising a cooling fluid reservoir and wherein a thermoelectric element cools the cooling fluid reservoir and wherein the cooling fluid cools the support structure and a sapphire window being in contact with a tissue treatment plane.
20 . The applicator according to claim 19 , wherein a cooling fluid circulation is in at least one of a group consisting of continuous circulation before the tissue treatment, in course of the tissue treatment and after the tissue treatment.
21 . The applicator according to claim 19 , wherein a cooling fluid is forced to circulate at defined periods and wherein the forced cooling fluid circulation is configured to operate in at least 200 ms before delivery of laser energy.