KR101049160B1 - Νｄ ： BAA laser device - Google Patents

Abstract

The present invention relates to a 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat, comprising: a flash lamp 120 and an Nd: YAG rod 130 which amplifies and oscillates excitation light input from the flash lamp 120. In the Nd: YAG laser device comprising a total reflection mirror 141 and an output mirror 142 located at both sides of the Nd: YAG rod 130, the convergence of converging the laser beam output to the output mirror 142 The optical fiber 170 for guiding the laser beam converged by the lens 160, the converging lens 160, and the laser beam guided by the optical fiber 170 are coupled to the output terminal of the optical fiber 170. The cannula 180 guides to fat, which is configured to be further included, and both ends of the Nd: YAG rod 130 and the inner surface of the total reflection mirror 141 so that only the laser beam having a wavelength of 1414 nm is oscillated through the output mirror 160. 141a and the inner surface 142a and outer surface 142b of the output mirror 142 are coated with With, and this structure, Nd: there is an advantage capable of damaging the surrounding tissue to a minimum, while using a YAG laser as the most efficient to remove the subcutaneous fat.

Nd: YAG laser, fat, absorbance, fiber optic, cannula

Description

Νｄ ： BAA laser apparatus {Nd: YAG LASER apparatus}

The present invention relates to an Nd: YAG laser device, and in particular, it is possible to irradiate the laser beam directly to the subcutaneous fat without irradiating the laser beam outside the skin, and at the same time, the absorption of fat in the wavelength that can be oscillated in the Nd: YAG laser device A 1414nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat, which can efficiently remove fat and at the same time reduce side effects to surrounding tissues by using a laser beam with a high water absorption with a 1414 nm wavelength. will be.

The wavelengths of the fat removal lasers currently commercially available include 1064 nm, 1319 nm, and 1444 nm.

1 is a graph showing the absorption of the laser beam into fat and water (the graph shown in FIG. 1 is referred to in US Pat. No. 6,660,880).

As shown in FIG. 1, the 1414 nm wavelength has a very high absorption rate for water and fat compared to the 1064 nm, 1319 nm, 1338 nm and 1357 nm wavelengths, and the absorption rate for the fat is slightly higher than that for the 1444 nm wavelength. It can be seen that low.

And, 1064 nm, 1319 nm, 1338 nm, 1357 nm, 1414 nm and 1444 nm are all wavelengths that can be oscillated in an Nd: YAG laser.

However, the method of removing fat using the Nd: YAG laser according to the prior art includes 1064nm, which has the highest absorption power in the Nd: YAG laser while having low absorption of fat but low absorption of water. Fat was removed using a laser beam of 1319 nm or the like.

Figure 2 shows the results of experiments measured by OCT (Optical Coherence Tomography) after irradiating a laser beam of 1064nm, 1319nm, 1414nm wavelength to pig fat similar to humans. As can be seen from the results of FIG. 2, the wavelength of 1414 nm is superior to the other two wavelengths in terms of dissolution effect. Adipose cells are composed of 60% to 85%, 5% to 30%, and 2% to 3% of lipids, water and protein, respectively. Therefore, the fat removal method using the Nd: YAG laser according to the prior art in addition to the dissolution effect surface had the following problems.

That is, the fat removal method using the Nd: YAG laser having a wavelength oscillation of less than 1414 nm in water and fat absorption, such as 1064 nm and 1319 nm wavelength according to the prior art, the laser of 1064 nm wavelength as shown in FIG. Due to the low absorption of the fat into the fat, the laser beam spreads to nearby tissues during fat removal.

When the 1064nm wavelength laser beam spreads to the tissue adjacent to the fat as described above, the 1064nm wavelength also damaged the extra-fat tissue because the absorption of water was also low.

That is, in the case of using a laser beam of 1064 nm wavelength according to the prior art, not only does fat removal itself become difficult, but also has a fatal problem of damaging surrounding tissues.

In addition, even if a laser beam near the 1200 nm wavelength is used, although the absorbance to fat is high but the absorbance to water is low, as shown in FIG. 3, the laser beam near the 1200 nm wavelength has low absorption to water. Therefore, this problem also occurs because the user may accidentally irradiate the surrounding tissues, which may cause a lot of damage to the surrounding tissues.

The present invention was created to solve the above-mentioned problems of the prior art, and the object of the 1414 nm wavelength oscillation Nd: YAG laser device dedicated to removing fat directly irradiated with fat according to the present invention is to directly optical fiber and ca By inserting the cannula, it is suitable to output the laser beam with the maximum absorption of fat by considering the absorption of fat without considering the loss of laser energy due to the absorption of the laser beam into water. It is to provide a 1414nm wavelength oscillation Nd: YAG laser device dedicated to the removal of fat directly irradiated to a fat.

Another object of the 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat according to the present invention is to absorb water while at the same time absorbing water in a laser beam capable of oscillating Nd: YAG laser. By only oscillating a laser beam with a high wavelength of 1414 nm, the present invention provides an Nd: YAG laser that is suitable for efficiently removing fat and minimizing damage to surrounding tissue.

Another object of the 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat according to the present invention is to fix the optical fiber with the fixed optical fiber which delivers the laser beam and actually insert the body into the body to irradiate the laser beam into the body. By separating the optical fiber used in the procedure by disposing the disposable optical fiber, only the disposable optical fiber inserted into the body can be discarded, thereby reducing the economic burden of disposal and eliminating the inconvenience of sterilizing the optical fiber at each procedure. It is to provide a Nd: YAG laser suitable to be able to improve the ease of use.

The Nd: YAG laser device of the present invention for achieving the above object, the flash lamp which receives power from the power supply unit and emits light, and the Nd: YAG rod and Nd: for amplifying and oscillating the excitation light input from the flash lamp; A Nd: YAG laser device which is positioned on both sides of a YAG rod and comprises a high reflector and an output coupler for reflecting light output from the Nd: YAG rod: A convergent lens for converging and converging a laser beam; An optical fiber for guiding a laser beam converged by the converging lens; And a cannular for coupling the laser beam guided by the optical fiber to the subcutaneous fat by coupling to the output end of the optical fiber so that the optical fiber can proceed smoothly without being bent subcutaneously. It is configured to include, characterized in that the both ends of the Nd: YAG rod and the inner surface of the total reflection mirror and the inner surface and the outer surface of the output mirror so that only the laser beam of 1414nm wavelength through the output mirror is oscillated.

The 1414nm wavelength oscillation Nd: YAG laser device for exclusive use of fat removal directly irradiated with fat of the present invention having the above-described configuration and operation has the following effects.

First, as described above, since only the laser beam of 1414 nm wavelength can be configured to oscillate and the laser beam of 1414 nm wavelength can be used for fat removal, the fat absorption degree of the laser laser beam of the wavelength that Nd: YAG laser can oscillate can be used. The highest laser beams are available and as a result have a very good effect on fat removal.

Second, when using a laser beam of 1414nm wavelength as described above, the laser beam of 1414nm wavelength may propagate to surrounding tissues without being absorbed by fat (F), even in this case, fat cells are a significant amount other than fat Since it also contains water, the 1414nm wavelength has a very high absorption rate of water, which has an excellent effect with very little damage to surrounding tissues. In fact, if we consider only the pure absorption coefficient ignoring the scattering coefficient, the absorption of water is very high in 1414nm, and only 99% of absorption is required even if only 2mm is propagated.

Third, the optical fiber 170 for transmitting the laser beam is separated into the fixed optical fiber 171 and the disposable optical fiber 172 which is actually inserted into the body and irradiates the laser beam into the body, thereby discarding the optical fiber used for the procedure. In this case, since only the disposable optical fiber 172 inserted into the body needs to be discarded, there is an advantage of reducing the economic burden due to the disposal, and also the convenience of use can be improved by eliminating the inconvenience of sterilizing the optical fiber every procedure. It has an effect.

Due to the very high absorption of water at 1414 nm wavelength, there is an excellent effect with very little damage to surrounding tissues.

The following will be described in detail with reference to the accompanying drawings a preferred embodiment of a 1414nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated to the present inventors fat.

First, a method of oscillating a laser beam having a wavelength of 1414 nm is briefly described as follows, and as a reference publication as follows.

[1] Hee Chul Lee, "Simultaneous dual-wavelength oscillation at 1357 nm and 1444 nm in a Kr-flashlamp pumped Nd: YAG laser", Opt Comm. Vol. 281 (2008) P.P 4455-4458.

[2] Richard C. Powell, Physics of solid-state laser materials (Springer-Verlag, 1998), Chap. 8.

[3] W. Koechner, Solid-State Laser Engineering (Springer-Verlag, 1999), pp. 48.

In the case of the 1414 nm and 1444 nm wavelengths, the stimulated emission cress section is smaller than that of 1064 nm or 1319 nm, which is very difficult to lase. As far as is known, the induced emission cross-sectional area and branching ratio at 1444 nm are known to be greater than 1414 nm. However, in the case of 1414 nm and 1444 nm, the difference in induced emission cross-sectional area and branching ratio is not so large that the two wavelengths can be oscillated simultaneously.

In the present invention, due to the energy level characteristics of two wavelengths in the transition of 1414 nm and 1444 nm wavelength in Nd: YAG crystal, 1414 nm wavelength is superior in actual laser operation, and using this, only 1414 nm wavelength oscillation Nd: We want to implement a YAG laser device.

In order to oscillate 1414nm or 1444nm, which is difficult to oscillate because the induced emission cross section is small, a method of oscillating two wavelengths at the same time can be used to determine the reflectance required.

For example (method 1) the conditions in the output coupler for the simultaneous oscillation of two wavelengths of 1064nm and 1319nm can be calculated using Equation (1) below (in the high reflector) Reflectivity is the case) (reference publication [1]).

- 수학식 (1)

Equation (1)

은 각각 유도 방출 단면적과, 레이저 주파수 및 출력거울에서의 반사율을 의미한다. 아래 첨자 1과 2는 각각 1064nm 파장과 1319nm 파장을 의미 하고

는 각각 Nd:YAG 결정의 길이 및 공진기 안의 손실을 의미한다.here

Denotes the induced emission cross-sectional area, and the reflectance at the laser frequency and output mirror, respectively. Subscripts 1 and 2 refer to 1064 nm and 1319 nm, respectively,

Denotes the length of the Nd: YAG crystal and the loss in the resonator, respectively.

For example, as a result of calculating using the above Equation (1), if the reflectance which can simultaneously oscillate both wavelengths of 1064nm and 1319nm is 50% at 1064nm and 78% at 1319nm, the reflectance of 1064nm is 50 to generate only 1319nm. The result should be less than%.

Therefore, if the above process is applied to other wavelengths that can be oscillated in Nd: YAG crystal, it is possible to oscillate 1414nm or 1444nm with relatively small induced emission cross-sectional area when the reflectance of the output mirror is below a certain reflectance for the wavelengths. .

That is, for example, if the reflectance of the output mirror is set to 93% to oscillate the 1414nm wavelength, the reflectance curve of the output mirror may be determined based on the calculated values of all reflectances so as not to oscillate the wavelength such as 1064nm or 1319nm. .

That is, as shown in FIG. 5, for example, when the reflectance of the output mirror is 93% at 1414 nm, the reflectance at 1064 nm, 1319 nm, 1338 nm, 1357 nm, and 1444 nm wavelengths is 25%, 60%, and 58 to generate only 1414 nm wavelength, respectively. Should be less than%, 79%, 88%.

That is, as shown in Fig. 6, when the reflectance of the output mirror has a reflectance curve below the dotted line, only the wavelength of 1414 nm can be oscillated.

Another method for oscillating only 1414nm wavelength (Method 2) is that the laser line filter, ie, the total reflection mirror and the output mirror, has a reflectance only at 1414nm and has a very low reflectance at all other oscillating wavelengths so as not to oscillate.

In fact, it is possible to make such mirrors, but in general, it is very difficult to make such mirrors having a reflectance of 99% or more, which is small enough to be used as a total reflection mirror.

Another method (Method 3) is to cause loss at different oscillating wavelengths in the total reflection mirror and the output mirror.

In other words, in Method 1, the reflectance of the total reflection mirror is calculated under the condition that the reflectance is 100% at all possible wavelengths.

In the 1064nm, 1319nm, 1338nm, 1357nm, and 1444nm wavelengths, the reflectance is set to less than 25%, 60%, 58%, 79%, and 88%, respectively, to prevent oscillation. This means not to rash.

Therefore, if the amount corresponding to the numerical value described above is lost in the output mirror and the total reflection mirror, respectively, this can be a method of obtaining a single wavelength of only 1414 nm.

TABLE 1 Induced emission cross-sectional areas at 1414 nm and 1444 nm wavelengths of Nd: YAG crystals (reference publication [2])

FIG. 7 shows energy levels when 1414 nm and 1444 nm are oscillated in an Nd: YAG crystal.

According to Boltzmann's distribution, at room temperature for ⁴ F _3/40% of the electron density of the _second level, only present in R ₂ and the other 60% is present in the R ₁ (R ₂ because of the energy is the energy of 11509 cm ^-1, and R ₁ Is 11425 cm ⁻¹ (reference publication [3]).

As shown in Table 1 and (a) of FIG. 7, 1444 nm is oscillated because the induced emission cross-sectional area of 1444 nm is larger than that of 1414 nm at room temperature. On the contrary, as shown in FIG. 7B, when the temperature is increased by the Boltzmann distribution, the density of the upper levels in each energy level increases.

In addition, once the oscillation is caused by ions of the R ₂ level, electrons are supplied from R ₁ by thermal transition (reference publication [3]).

Thus, if the reflectance difference between the two wavelengths is negligible, the oscillation wavelength will shift from 1444 nm to 1414 nm as the temperature of the laser crystal rises. Once oscillated by ions of the R ₂ level, electrons are supplied from R ₁ by thermal transition (reference publication [3]).

Therefore, in the case of having the same resonator structure, even if the induced emission cross section of 1414 nm is smaller than that of 1444 nm, the output energy of 1414 nm will be greater than 1444 nm once the resonance conditions are set so that 1414 nm is oscillated.

8 is an experimental result demonstrating the above assumption. The experimental condition is to adjust the reflectance of the output mirror so that only 1414nm and 1444nm can be oscillated without other oscillating wavelengths, and at the same time the reflectivity of 1414nm and 1444nm has the same value as 92%, then the pumping energy is fixed at 44J and the coolant is After changing only the temperature of, the change of the output wavelength was observed.

As can be seen in Figure 8 as the temperature of the cooling water increases as the output wavelength is shifted from 1444nm to 1414nm it can be seen that the output energy changes.

9 is a result of examining the difference in the output energy at the two wavelengths according to the change in the coolant temperature at the input energy of 44J using two output mirrors in which the reflectance of the output mirror is adjusted so that only 1444 nm and 1414 nm are oscillated, respectively.

As can be seen from the results of FIG. 9, in the case of 1414 nm, there is no difference in energy according to the temperature change of the coolant, whereas in 1444 nm, the energy change according to the temperature of the coolant is large and the output energy is also smaller than 1414 nm in the case of 1444 nm.

Therefore, when Nd: YAG crystal is used to oscillate the laser in the 1400nm region, it can be seen that 1414nm is superior in terms of output energy and stability of equipment than 1444nm having the largest induced emission cross section.

According to the results calculated using Equation (1), the reflectance must be at least 5% higher than 1444 nm for the first 1414 nm to be oscillated. That is, if the reflectance of 1414 nm in the output mirror is 93%, the reflectance of 1444 nm should be less than 88%.

We now describe a specific Nd: YAG laser device for oscillation at 1414nm wavelength.

10 is a block diagram of a 1414 nm wavelength oscillating Nd: YAG laser device dedicated to removing fat directly irradiated with fat according to the present invention.

As shown in FIG. 10, the 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat according to the present invention converges with the Nd: YAG laser main body 100, the beam combiner and the filter 150. It is configured to include a lens 160, an optical fiber 170 and the cannula 180.

The Nd: YAG laser main body 100 includes a flash lamp 120 that receives power from the power supply unit 110 and emits light, and an Nd: YAG rod that amplifies and oscillates the excitation light input from the flash lamp 120 ( 130 and a total reflection mirror 141 and an output mirror 142 positioned at both sides of the Nd: YAG rod 130 to reflect light output from the Nd: YAG rod 130.

The convergent lens 160 collects and converges a laser beam output through the output mirror 142 and may be implemented as, for example, a convex lens.

The optical fiber 170 receives the laser beam converged by the converging lens 160 and guides the laser beam into the fat F.

The cannula 180 is coupled to the output end of the optical fiber 170 to allow the optical fiber 170 to proceed smoothly without being bent subcutaneously and guided by the optical fiber 170. Guide the beam to the subcutaneous fat.

In addition, the configuration of the cannula 180 and the optical fiber 170 will be described in more detail below.

Since the laser beam is irradiated directly to the fat (F) through the optical fiber 170 and the cannula 180 as described above, considering the loss of the laser due to absorption of water, such as when irradiating the laser laser beam outside the skin Since it is not necessary, the wavelength of 1414 nm with a higher fat absorption can be used.

The laser beam output through the output mirror 160 includes both end surfaces of the Nd: YAG rod 130 and an inner surface 141a of the total reflection mirror 141 such that only a laser beam having a wavelength of 1414 nm is oscillated. The inner surface 142a and the outer surface 142b of the output mirror 142 are coated.

The coating specification for outputting only a laser beam of 1414 nm wavelength is described in detail. In one embodiment of the present invention, in order to only oscillate the laser beam of 1414nm wavelength, both surfaces of the Nd: YAG rod 130 is an antireflective coating so that the laser beam of 1050 ~ 1450nm wavelength is not reflected, The inner surface 141a of the total reflection mirror 141 is a total reflection of the laser beam of 1414nm wavelength, the inner surface 142a of the output mirror 142 has a reflectance of less than 48% in the 1050 ~ 1150nm wavelength band and in the 1300 ~ 1360nm wavelength band It has a reflectance of less than 79% and is coated such that the reflectance of the 1414 nm wavelength is at least 5% higher than the reflectance of the 1444 nm wavelength, and the outer surface 142b of the output mirror 142 is coated so as to be antireflective at a wavelength band of 1050 to 1450 nm. The converging lens 160 is characterized in that the laser beam of 1414nm wavelength is anti-reflective coating so as not to reflect.

In addition, in one embodiment of the present invention, the inner surface 142a of the output mirror 142 has a reflectance of less than 48% in the wavelength range of 1050 ~ 1150nm (particularly, it is desirable to have a reflectance of less than 25% at 1064nm wavelength). It has a reflectivity of less than 79% in the 1300 ~ 1360nm wavelength band, has a 93% reflectivity at 1414nm wavelength, and is coated to have a reflectance of less than 88% at 1444nm wavelength.

As described above, the coating can be coated to have a reflectance of 93% at 1414 nm and a reflectance of less than 88% at 1444 nm. Since the laser has an optimized reflectance according to its operating conditions, the reflectance of 1414 nm is not limited to 93%. to be. That is, depending on the laser operating conditions, the lower reflectance can be higher reflectance at low power. Also in this case, the reflectance of 1414 nm should always be higher than the reflectance of the 1444 nm, 1050 ~ 1150 nm and 1300 ~ 1360 nm band.

In addition, as shown in Method 1, 2, and 3 above, in order to oscillate only 1414 nm wavelength, there may be three kinds of the above various methods, and thus, the reflectance of various wavelengths is not limited.

In an embodiment of the present invention, a beam combiner and a filter 150 is provided between the output mirror 142 and the converging lens 160, and the beam combiner and The incident surface 150a of the filter 150 has a transmittance of 98.5% or more at a wavelength of 1414 nm among the laser beams output from the output mirror 142 and has a wavelength of 1064 nm having the largest induced emission cross section in the Nd: YAG rod 130. Amplified Spontaneous Emission (ASE) is incident, or the resonator mirror or Nd: YAG crystals are contaminated, the reflectance is changed to have a reflectance of 99% at 1064nm wavelength in preparation for the 1064nm wavelength oscillation.

Indeed, as noted in [Reference 1], even if the loss of the 1064nm wavelength in the resonator is very large, it is possible that the gain of 1414nm wavelength will not be formed around the Nd: YAG rod due to the thermal lens effect of Nd: YAG. The presence of the beam combiner and filter 150 is essential as it exists.

In addition, the 1414 nm wavelength oscillation Nd: YAG laser device for exclusive use of fat removal according to an embodiment of the present invention is a position where a laser beam of 1414 nm wavelength oscillated from the Nd: YAG rod 130 is irradiated in the skin for fat removal. Aiming beam oscillator 190 for outputting an aiming beam (aiming beam) to inform the beam combiner and the filter 150, characterized in that it is configured to further include.

The wavelength of the aiming beam output from the aiming beam oscillator 190 is preferably a low power of, for example, a red wavelength band (more preferably, a wavelength of 633 nm) of 630 nm to 660 nm.

By outputting the low power aming beam of the red band of 630-660 nm wavelength, the position of the laser beam of 1414 nm irradiated with the skin (more precisely, the position of the cannula 180 in the skin) can be known, thereby improving the convenience and efficiency of the procedure. There is an advantage to maximize.

In one embodiment of the present invention, the emission surface 150b of the beam combiner and filter 150 is coated to have a reflectivity of 90% or more at a wavelength of 633 nm and a transmittance of 99.5% or more at a wavelength of 1414 nm. The converging lens 160 is characterized in that the laser beam of 1414nm wavelength and 633nm wavelength is antireflective coating so as not to reflect.

In addition, in the 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat according to an embodiment of the present invention, the optical fiber 170 guides the laser beam converged by the converging lens 160. And a disposable optical fiber 172 inserted into the body so as to irradiate the laser beam transmitted from the fixed optical fiber 171 into the body. do.

In addition, in the 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat according to an embodiment of the present invention, the cannula 180 has an output end of the fixed optical fiber 170. A cannula body 181 fixed to one side and provided so that an input end of the disposable optical fiber 172 is detachable to the other side and held by an operator, and an output end of the optical fiber 170 inside the cannula body 181. And a light transmission provided between the input end of the disposable optical fiber 172 and guiding the laser beam so that the laser beam emitted from the output end of the fixed optical fiber 171 is smoothly incident on the input end of the disposable optical fiber 172. Cannular tip that is extrapolated to the disposable optical fiber 172, so that the means 182 and the disposable optical fiber 172 can be smoothly inserted into the body without being bent subcutaneously It is characterized by comprising a) (184).

In addition, a 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal directly irradiated with fat according to an embodiment of the present invention is interpolated to be detachably attached to the rear end of the cannula body 181, and the disposable optical fiber ( It is characterized in that the through-hole 183a through which the 172 is inserted is further included and includes a disposable optical fiber holder 183 formed therein in the advancing direction of the laser beam.

The light transmitting means 182 is provided inside the cannula body 181 so as to be located forward from the output end of the fixed optical fiber 171 in the traveling direction of the laser beam and exits from the fixed optical fiber 171. An enlarged collimated lens 182a for changing the laser beam into parallel light to enlarge the beam size, and inside the cannula body 181 to be located in front of the collimated lens 182a. And a focusing lens 182b configured to focus the parallel laser beam passing through the collimated lens 182a to be incident on the input terminal of the disposable optical fiber 172.

In this case, the focal length between the collimated lens 182a and the focusing lens 182b depends on the NA (Numercial Aperture) of the optical fibers 171 and 172 and the diameter of the parallel light to be made, and the position of the focused laser beam is shown in FIG. 11. As shown in FIG. 5, the light is collected in front of the incident surface of the disposable optical fiber 172 to prevent damage of the disposable optical fiber 172.

According to the above configuration, the optical fiber 170 for transmitting the laser beam is separated into the fixed optical fiber 171 and the disposable optical fiber 172 which is actually inserted into the body and irradiates the laser beam into the body, thereby performing the procedure. In the case of discarding the used optical fiber, only the disposable optical fiber 172 inserted into the body needs to be discarded, thereby reducing the economic burden due to the disposal, and also eliminating the inconvenience of having to sterilize the optical fiber every procedure. There is an advantage to improve the convenience.

That is, only the disposable optical fiber 172 inserted into the body after the procedure can be disposed. At this time, since the length of the disposable optical fiber 172 is short, the burden of cost loss is also reduced.

In addition, in the 1414 nm wavelength oscillation Nd: YAG laser device dedicated to fat removal according to an embodiment of the present invention, the output of the laser beam oscillated by the Nd: YAG rod 130 is 1-100 Hz, at a repetition rate per pulse. It is characterized in that the energy 10 ~ 10,000mJ, power 0.5 ~ 50W, pulse width 10㎲ ~ 1000ms.

In addition, when using a laser beam of 1414nm wavelength as in the present invention, the laser beam of 1414nm wavelength may propagate to surrounding tissues without being absorbed by fat (F), even in this case, water of 1414nm wavelength Due to the very high absorption, the damage of surrounding tissues is very small compared to the case of using laser beams of different wavelengths.

The following describes the operation of a 1414 nm wavelength oscillating Nd: YAG laser device dedicated to fat removal directly irradiated with fat of the present invention having the above-described configuration.

11 is a conceptual diagram in the case of using a laser beam having a wavelength of 1414 nm according to the present invention.

First, since both surfaces of the Nd: YAG rod 130 and the inner surface 141a of the total reflection mirror 141 and the inner surface 142a and the outer surface 142b of the output mirror 142 are coated by the coating specifications as described above, When power is applied to the power supply 110, only the laser beam having a wavelength of 1414 nm is output from the output mirror 142.

At this time, the laser beam of 1064nm wavelength which can be generated finely at high output is filtered by the beam combiner and the filter 150 and thus cannot enter the optical fiber 170.

Then, the laser beam of 1414 nm wavelength transmitted through the optical combiner and filter 150 is converged by the converging lens 160 and guided by the optical fiber 170 and the cannula 180 to be subcutaneous fat (F). It is irradiated directly inside to break down fat.

As shown in FIG. 11, since the light of 1414 nm used in the present invention has high absorption of fat and absorption of water at the same time, even when a user accidentally irradiates a laser to tissues surrounding fat, Moisture absorbs the laser, preventing heat expansion. Therefore, even if the user accidentally irradiates a laser to the tissue around the fat, damage to the surrounding tissue (part shown in black in FIG. 11) can be minimized.

Meanwhile, the aiming beam oscillated by the aiming beam oscillator 190 is reflected by the beam combiner and the filter 150, passes through the converging lens 160, enters the optical fiber 170, and adjusts the position of the cannula 180. Inform.

The above embodiments of the present invention are merely one embodiment of the technical idea of the present invention, and of course, other modifications are possible within the technical idea of the present invention.

1 is a graph showing the absorbance of a laser beam into fat and water.

Figure 2 is a photograph of the experimental results measured by optical coherence tomography (OCT) after irradiating a laser beam of 1064nm, 1319nm, 1414nm wavelength to the fat of the pig.

3 is a conceptual diagram in the case of using a laser beam of 1064 nm wavelength according to the prior art.

4 is a conceptual diagram in the case of using a laser beam having a wavelength of about 1200 nm.

FIG. 5 is a graph showing reflectance for simultaneous oscillation of wavelengths of other laser beams when the reflectance of 1414 nm is 93% in the output mirror.

FIG. 6 is a graph showing a reflectance curve that an output mirror should have for the simultaneous generation of different laser beam wavelengths when the reflectance of 1414 nm is 93% in the output mirror.

Fig. 7 is an energy level diagram showing energy levels of Nd: YAG crystals at room temperature and higher than room temperature.

8 is a graph of output energy according to cooling water temperature when the input energy is 44J.

9 is a graph of output energy of 1414 nm wavelength and 1444 nm wavelength according to the temperature of cooling water.

Fig. 10 is a block diagram of a 1414 nm wavelength oscillation Nd: YAG laser device for exclusive use of fat removal directly irradiated with fat according to the present invention.

FIG. 11 is a detailed cross-sectional view of the cannula in FIG. 10.

FIG. 12 is an exemplary view showing a state of use when the linear optical disposable fiber is removed from the cannula of FIG. 10.

FIG. 13 is an exemplary view illustrating a state of use when the disposable optical fiber of the bent type is removed from the cannula of FIG. 10.

Fig. 14 is a conceptual diagram in the case of using a laser beam of 1444 nm wavelength according to the present invention.

      Explanation of symbols on the main parts of the drawings

110; Power supply 120; Flashlight

130; Nd: YAG rod 141; Total reflection mirror

142; Output mirror 150; Beam combiners and filters

160; Converging lens 17O; Fiber optic

171; Fixed optical fiber 172; Disposable fiber optic

180; Cannula 181; Cannula body

182a; Collimated lens 182b; Focusing lens

183; Disposable optical fiber holder 184; Cannula tips

190; Aiming Beam Oscillator

Claims (11)

A flash lamp 120 that receives power from the power supply 110 and emits light, an Nd: YAG rod 130 that absorbs and amplifies a laser wavelength after absorbing the excitation light input from the flash lamp 120, and Located on both sides of the Nd: YAG rod 130, including a total reflector (141) and an output coupler (142) for reflecting the light output from the Nd: YAG rod (130) For Nd: YAG laser device: A convergent lens 160 for converging and converging a laser beam output through the output mirror 142; An optical fiber 170 for guiding a laser beam converged by the converging lens 160; And Coupling to the output end of the optical fiber 170 to allow the optical fiber 170 to proceed smoothly without being subcutaneous to guide the laser beam guided by the optical fiber 170 to the subcutaneous fat Cannular (cannular) to be configured to further include 180, Both ends of the Nd: YAG rod 130 and the inner surface 141a of the total reflection mirror 141 and the inner surface 142a of the output mirror 142 so that only a laser beam having a wavelength of 1414 nm is oscillated through the output mirror 160. Nd: YAG laser device characterized in that the coating and the outer surface (142b). The method according to claim 1, In order to only oscillate the laser beam of 1414nm wavelength, Both sides of the Nd: YAG rod 130 is an antireflective coating so that the laser beam of 1050 ~ 1450nm wavelength is not reflected, The inner surface 141a of the total reflection mirror 141 has a total reflection of the laser beam of 1414 nm wavelength and is equal to or lower than a reflectance of 1414 nm at a wavelength of 1444 nm and a reflectance of at least 30% lower than that of 1414 nm at a wavelength of 1050 to 1150 nm. In the 1300 ~ 1360nm wavelength band is coated to have a reflectance of more than 20% lower than the reflectance of 1414nm, The inner surface 142a of the output mirror 142 has a reflectance of less than 48% in the 1050 ~ 1150nm wavelength band, a reflectance of less than 79% in the 1300 ~ 1360nm wavelength band, the reflectance of the 1414nm wavelength is 5% than the reflectance of the 1444nm wavelength Is coated to be higher than The outer surface 142b of the output mirror 142 is coated to be anti-reflective in the wavelength band of 1050 ~ 1450nm, The converging lens (160) is a Nd: YAG laser device characterized in that the anti-reflective coating so that the laser beam of 1414nm wavelength is not reflected. The method according to claim 2, The inner surface 142a of the output mirror 142 has a reflectance of less than 48% in the wavelength range of 1050 to 1150 nm, a reflectance of less than 79% in the wavelength range of 1300 to 1360 nm, a reflectance of 93% at the wavelength of 1414 nm and a wavelength of 1444 nm at the wavelength of 1444 nm. Nd: YAG laser device, characterized in that the coating is coated with a reflectance of less than 88%. The method of claim 3, The inner surface 142a of the output mirror 142 is coated to have a reflectivity of less than 25% at 1064 nm wavelength in the 1050 to 1150 nm band, and is coated to have a reflectance of less than 58% at 1319 to 1339 nm in the 1300 to 1360 nm band. Nd: YAG laser device, characterized in that. The method according to claim 2, A beam combiner and a filter 150 is provided between the output mirror 142 and the converging lens 160. Nd: YAG laser device, characterized in that the incident surface (150a) of the beam combiner and filter 150 is coated to have a transmittance of 98.5% or more at 1414nm wavelength and 99% reflectance at 1064nm wavelength. The method according to claim 5, Emission beam of the beam combiner and filter 150 to indicate the position where the laser beam of 1414nm wavelength emitted from the Nd: YAG rod 130 is irradiated in the skin for fat removal An Nd: YAG laser device, characterized in that further comprises an aiming beam oscillator 190 output to the surface (150b). The method according to claim 6, The wavelength of the aiming beam output from the aiming beam oscillator 190 is 633 nm, The incident surface 150a of the beam combiner and filter 150 is coated to have a transmittance of 98.5% or more at a wavelength of 1414 nm and a reflectance of at least 99% at a wavelength of 1064 nm. The exit surface 150b of the beam combiner and filter 150 is coated to have a reflectivity of 90% or more at a wavelength of 633 nm and a transmittance of 99.5% or more at a wavelength of 1414 nm. The converging lens 160 is Nd: YAG laser apparatus characterized in that the laser beam of 1414nm wavelength and 633nm wavelength is antireflective coating so that the reflection is not reflected. The method according to claim 1, The optical fiber 170, A fixed optical fiber 171 for guiding the laser beam converged by the converging lens 160 and a disposable optical fiber inserted into the body to irradiate the laser beam guided and transmitted from the fixed optical fiber 171 into the body ( Disposal Optical Fiber) is composed of 172, The cannular 180 is, An output end of the fixed optical fiber 170 is fixed to one side, and an input end of the disposable optical fiber 172 is detachable to the other side, and a cannula body 181 held by an operator; The laser beam emitted from the output end of the fixed optical fiber 171 is provided between the output end of the optical fiber 170 and the input end of the disposable optical fiber 172 in the cannula body 181, the disposable light Light transmitting means 182 for guiding the laser beam to be smoothly incident to the input terminal of the fiber 172, The disposable optical fiber 172 is configured to include a cannular tip (184) that is extrapolated to the disposable optical fiber 172 to be inserted into the body smoothly without bending under the skin Nd: YAG laser device. The method according to claim 8, A disposable optical fiber holder interpolated to be detachably attached to a rear end of the cannula body 181 and having a through hole 183a interposed therebetween through which the disposable optical fiber 172 is interpolated and formed therein in the direction in which the laser beam travels. N83: YAG laser device, characterized in that further comprises a 183). The method according to claim 8, The light transmitting means 182, The laser beam emitted from the fixed optical fiber 171 is provided inside the cannula body 181 so as to be located forward from the output end of the fixed optical fiber 171 in the advancing direction of the laser beam. A collimated lens 182a for enlarging the beam size by The cannula body 181 is provided inside the collimator lens 182a so as to be positioned in front of the collimator lens 182a, and focuses a parallel laser beam that has passed through the collimator lens 182a of the disposable optical fiber 172. An Nd: YAG laser device, comprising: a focused lens (182b) to be incident on an input end. The method according to claim 1, The output of the laser beam oscillated by the Nd: YAG rod 130, Nd: YAG laser, characterized in that the repetition rate 1 ~ 100Hz, energy per pulse 10 ~ 10,000mJ, power 0.5 ~ 50W, pulse width 100 ~ 1000ms Device.

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