Conversion device for intense pulsed light by using cerium-doped: YAG (yttrium aluminum garnet) crystal and medical cosmetology equipment

Abstract

The invention discloses a device for converting intense pulsed light by using a cerium-doped YAG (yttrium aluminum garnet) crystal and medical beauty equipment. The conversion device comprises a pulse xenon lamp used for emitting strong pulse light with a preset wavelength; the cerium-doped YAG wafer is arranged on the light emitting side of the pulse xenon lamp and used for absorbing ultraviolet light and blue light with the wavelength range of 300-500 nm in the strong pulse light and converting the ultraviolet light and the blue light into yellow-green light with the wavelength range of 500-700 nm; the filter plate is arranged on the light emitting side of the cerium-doped YAG wafer and is matched with the wave band of the cerium-doped YAG wafer so as to filter light rays of other wave bands; and the light guide part is arranged on the light emitting side of the filter and is used for light conduction and light energy output. According to the conversion device, the cerium-doped YAG wafer is arranged between the pulse xenon lamp and the optical filter, so that ultraviolet light and blue light with the wavelength range of 300-500 nm in strong pulse light are absorbed and converted into yellow-green light with the wavelength range of 500-700 nm, and the situation that the energy utilization efficiency is reduced due to the fact that the ultraviolet light and the blue light are directly filtered out is avoided.

Description

Technical Field

[0001] The invention relates to a conversion device for intense pulsed light using cerium-doped YAG crystals, and also relates to medical cosmetic equipment using the conversion device, belonging to the technical field of medical lasers. Background Art

[0002] Intense pulsed light (IPL) is a light source technology widely used in the field of medical cosmetology. It is generated by a pulsed xenon lamp and matched with a filter to select light of a specific wavelength. The wavelength range of intense pulsed light is wide, usually covering from 400nm to 1200nm, which enables it to cover the specific absorption peaks of a variety of skin pigments and blood vessels, such as melanin, oxyhemoglobin and water, thereby achieving therapeutic effects on a variety of skin problems. The theoretical basis of intense pulsed light treatment of skin diseases is the principle of selective photothermal action, that is, the use of light energy absorbed by specific skin components and converted into heat energy to achieve the purpose of treatment.

[0003] In practical applications, by selecting appropriate filters, a wavelength range of 515nm to 700nm can be selected, which includes green, yellow and red light bands and is suitable for treating a variety of skin diseases. However, in order to protect the skin from damage, it is necessary to strictly filter out blue light (wavelength range of 450nm) and shorter wavelength ultraviolet light (wavelength range below 400nm) that have side effects on the skin through filters. Although the use of such filters can protect the skin, it also reduces the energy utilization efficiency of intense pulsed light.

[0004] Therefore, how to improve the energy utilization efficiency of intense pulsed light while ensuring the safety and effectiveness of treatment is an important challenge currently facing the field of skin disease treatment. Summary of the invention

[0005] The primary technical problem to be solved by the present invention is to provide a device for converting intense pulsed light using cerium-doped YAG crystals.

[0006] Another technical problem to be solved by the present invention is to provide a medical cosmetic device using the conversion device.

[0007] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0008] According to a first aspect of an embodiment of the present invention, there is provided a device for converting intense pulsed light using a cerium-doped YAG crystal, comprising:

[0009] A pulsed xenon lamp for emitting intense pulsed light of a preset wavelength;

[0010] The cerium-doped YAG wafer is arranged on the light-emitting side of the pulse xenon lamp, and is used to absorb the ultraviolet light and blue light with a wavelength range of 300 to 500 nm in the intense pulse light, and convert it into yellow-green light with a wavelength range of 500 to 700 nm;

[0011] A filter is arranged on the light-emitting side of the cerium-doped:YAG chip and matches the wavelength of the cerium-doped:YAG chip to filter light of other wavelengths except the matching wavelength;

[0012] The light guide part is arranged on the light output side of the filter and is used for light transmission and light energy output.

[0013] Preferably, the pulse xenon lamp comprises:

[0014] Xenon lamp column, used to emit intense pulsed light of a preset wavelength;

[0015] The focusing reflector is covered on the outside of the xenon lamp column and away from the light-emitting side of the xenon lamp column, and is used for focusing the strong pulse light scattered to the surroundings and reflecting it to the light-emitting side of the xenon lamp column.

[0016] Preferably, the incident surface of the cerium-doped:YAG chip is coated with a blue light anti-reflection film and a yellow-green light high-reflection film, and the exit surface of the cerium-doped:YAG chip is coated with a blue light high-reflection film and a yellow-green light anti-reflection film.

[0017] Preferably, the cerium-doped: YAG wafer and the filter together form a plug-in assembly, and the plug-in assembly is pluggably installed on the light-emitting side of the pulse xenon lamp for replacing different plug-in assemblies;

[0018] Among them, different plug-in components correspond to output light of different bands.

[0019] Preferably, at least part of the Y component in the cerium-doped:YAG wafer is replaced by Lu component or Gd component to achieve a blue shift or a red shift of the central wavelength;

[0020] The greater the proportion of the Y component in the cerium-doped:YAG wafer being replaced, the greater the amplitude of the blue shift or red shift of the central wavelength.

[0021] Preferably, the conversion device further comprises:

[0022] The focusing part is arranged on the light output side of the light guide part and is used for focusing the light output by the light guide part.

[0023] Preferably, the conversion device further comprises:

[0024] Sapphire, arranged on the light-emitting side of the focusing portion, for contacting or separating with the skin;

[0025] The refrigeration unit is mounted on the sapphire and is used to cool the sapphire.

[0026] Preferably, the cerium-doped:YAG chip has a preset thickness and a preset doping degree, so that the cerium-doped:YAG chip achieves a preset light conversion efficiency.

[0027] According to a second aspect of an embodiment of the present invention, another device for converting intense pulsed light using a cerium-doped YAG crystal is provided, comprising:

[0028] A pulsed xenon lamp for emitting intense pulsed light of a preset wavelength;

[0029] The cerium-doped YAG crystal ring is sleeved on the outer side of the pulse xenon lamp and is used to absorb the ultraviolet light and blue light with a wavelength range of 300 to 500 nm in the intense pulse light and convert it into yellow-green light with a wavelength range of 500 to 700 nm;

[0030] A filter is arranged on the light-emitting side of the cerium-doped:YAG chip and matches the wavelength of the cerium-doped:YAG chip to filter light of other wavelengths except the matching wavelength;

[0031] The light guide part is arranged on the light output side of the filter and is used for light transmission and light energy output.

[0032] According to a third aspect of an embodiment of the present invention, a medical cosmetic device is provided, comprising the above-mentioned conversion device.

[0033] Compared with the prior art, the present invention has the following technical effects:

[0034] 1. Through the cerium-doped: YAG wafer or cerium-doped: YAG crystal ring, ultraviolet light and blue light with a wavelength range of 300 to 500nm can be converted into yellow-green light with a wavelength range of 500 to 700nm, thereby avoiding directly filtering out ultraviolet light and blue light with a wavelength range of 300 to 500nm and reducing the energy utilization efficiency of intense pulsed light.

[0035] 2. The cerium-doped:YAG wafer or the cerium-doped:YAG crystal ring has a preset thickness and a preset doping degree, so that the cerium-doped:YAG wafer or the cerium-doped:YAG crystal ring can achieve a preset light conversion efficiency.

[0036] 3. According to the needs of the yellow-green light center spectrum, a cerium-doped crystal in which Lu (lutetium) or Gd (gadolinium) components are used to replace part or all of the Y (yttrium) component can be selected to achieve a blue shift or red shift of the center wavelength.

[0037] 4. The light conversion efficiency is further improved by coating the two ends of the cerium-doped: YAG wafer.

[0038] 5. The cerium-doped: YAG chip and the filter are used as a plug-in component, which can be installed on the light output side of the pump light source in a plug-in manner so that different plug-in components can be selected according to different skin treatment scenarios to output light of different wavelengths.

[0039] 6. The focusing part can focus the light output by the light guide part, and the use of sapphire in conjunction with the cooling part can avoid burns to the skin, ensure the safety of laser treatment, and effectively improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the structure of a device for converting intense pulsed light using a cerium-doped YAG crystal provided in the first embodiment of the present invention;

[0041] Figure 2 An application scenario diagram of a device for converting intense pulsed light using a cerium-doped:YAG crystal provided in the first embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the structure of a cerium-doped:YAG wafer after coating in the first embodiment of the present invention;

[0043] Figure 4 Schematic diagram of the spectrum of the red-shift or blue-shift of the central spectrum of yellow-green light in the first embodiment of the present invention;

[0044] Figure 5 A schematic diagram of the structure of a device for converting intense pulsed light using a cerium-doped YAG crystal provided in a second embodiment of the present invention;

[0045] Figure 6 A schematic structural diagram of a device for converting intense pulsed light using a cerium-doped YAG crystal provided in the third embodiment of the present invention. DETAILED DESCRIPTION

[0046] The technical content of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] The wavelength of intense pulsed light usually covers 400 to 1200 nm. Different filters can be designed to select different light wavebands for targeted treatment of skin diseases. Among them, intense pulsed light mainly uses its biostimulation effect to improve skin conditions such as skin sagging, wrinkles, and enlarged pores. In the treatment of acne, intense pulsed light mainly uses photochemical effects and selective photothermal effects to treat inflammatory skin lesions such as pustules. For example, when intense pulsed light is used to treat vascular skin diseases, hemoglobin is the main color base. Intense pulsed light can be preferentially and selectively absorbed by oxygenated hemoglobin in blood vessels and converted into heat energy to heat up in tissues. When the pulse width of the light wave is less than the thermal relaxation time of the target tissue, the temperature rise of the blood vessels can reach the damage threshold of the blood vessels, which can coagulate and destroy the blood vessels, leading to vascular occlusion and degeneration, and gradually being replaced by microscopic tissues to achieve the treatment purpose. In addition, when intense pulsed light is used to treat pigmented skin diseases, melanin selectively absorbs the spectrum of intense pulsed light, producing an "implosion effect" or "selective pyrolysis effect", so melanocytes can be destroyed and melanosomes can be broken up. Intense pulsed light can also use the selective absorption of near-infrared spectra by melanin in hair follicles to degenerate hair follicles and achieve optical hair removal.

[0048] In the prior art, taking the typical M22 intense pulsed light platform produced by Lumenis, USA as an example, it is equipped with the following filters and indications:

[0049] 515nm: acts on the superficial layer of the epidermis and is suitable for improving superficial pigmentation problems, such as brightening skin tone.

[0050] 560nm: Acts on the entire epidermis and is suitable for improving dull skin tone, mild pigmentation and skin redness.

[0051] 570nm: Acts on the capillary network in the dermis and is suitable for treating inflammation, photoaging and red blood streaks.

[0052] 615nm and 640nm: mainly act on the reticular fiber layer in the dermis, suitable for treating enlarged pores and skin rejuvenation.

[0053] 695nm: acts on the deep layer of the skin and is often used for photon hair removal.

[0054] It can be seen that the wavelength range of 515nm to 700nm is a spectral band with a wide range of uses, namely the green, yellow and red light bands. However, ordinary pulsed xenon lamps need to strictly filter out blue light (wavelength range of 450nm) and shorter ultraviolet light (wavelength range of less than 400nm) that have obvious side effects and damage to the skin when used, thereby reducing the energy utilization efficiency of intense pulsed light. On this basis, the present invention utilizes cerium (Ce)-doped YAG single crystals, namely YAG:Ce crystals, to absorb the ultraviolet band with a wavelength range of 300 to 360nm and the blue light band with a wavelength range of 400 to 500nm, and convert them into green, yellow and red light bands with a wavelength range of 500 to 700nm, thereby achieving effective spectral conversion and energy improvement for the spectrum of intense pulsed light, and improving the energy utilization efficiency of pulsed xenon lamps.

[0055] First embodiment

[0056] like Figure 1 and Figure 2 As shown, a first embodiment of the present invention provides a device for converting intense pulsed light using a cerium-doped:YAG crystal, comprising a pulse xenon lamp 1, a cerium-doped:YAG wafer 2, a filter 3 and a light guide 4. The pulse xenon lamp 1 is used to emit intense pulsed light of a preset wavelength; the cerium-doped:YAG wafer 2 is arranged on the light-emitting side of the pulse xenon lamp 1, and is used to absorb ultraviolet light and blue light with a wavelength range of 300 to 500 nm in the intense pulsed light, and convert it into yellow-green light with a wavelength range of 500 to 700 nm. The filter 3 is arranged on the light-emitting side of the cerium-doped:YAG wafer 2, and matches the wavelength of the cerium-doped:YAG wafer 2 to filter light of other wavelength bands except the matching wavelength band. The light guide 4 is arranged on the light-emitting side of the filter 3, and is used for light transmission and light energy output.

[0057] Specifically, Figure 1 As shown, in this embodiment, the pulse xenon lamp 1 includes a xenon lamp column 11 and a focusing reflector 12. The xenon lamp column 11 is cylindrical (not limited to a specific shape) and is used to emit intense pulsed light of a preset wavelength. The focusing reflector 12 is arc-shaped and is covered on the outside of the xenon lamp column 11 and away from the light emitting side of the xenon lamp column 11 (i.e. Figure 1 The focusing reflector 12 is located on one side below the xenon lamp column 11, and is used to converge the intense pulsed light scattered to the surroundings and reflect it to the light output side of the xenon lamp column 11. Therefore, the light output efficiency of the xenon lamp column 11 can be improved by using the focusing reflector 12, and the scattering of the intense pulsed light can be reduced.

[0058] In addition, preferably, the light conversion efficiency can be further improved by coating. Figure 3As shown, the incident surface of the cerium-doped:YAG wafer 2 is coated with a blue light anti-reflection film 21 and a yellow-green light high-reflection film 22, and the exit surface of the cerium-doped:YAG wafer 2 is coated with a blue light high-reflection film 23 and a yellow-green light anti-reflection film 24. Therefore, on the incident surface of the cerium-doped:YAG wafer 2, the blue light anti-reflection film 21 can increase the light transmittance of blue light to improve the transmittance of blue light; and the yellow-green light high-reflection film 22 increases the reflectivity of the incident surface for yellow-green light, so that the yellow-green light formed after conversion will be reflected after irradiating the incident surface, avoiding the yellow-green light from being transmitted from the incident surface and reducing the output of the yellow-green light. Similarly, on the exit surface of the cerium-doped:YAG wafer 2, the blue light high-reflection film 23 can prevent the blue light from passing through the exit surface, and the yellow-green light anti-reflection film 24 can increase the transmittance of the yellow-green light.

[0059] like Figure 4 As shown, it can be understood that when the central spectrum of yellow-green light needs to be adjusted, at least part of the Y (yttrium) component in the cerium-doped:YAG chip 2 can be replaced by Lu (lutetium) component or Gd (gadolinium) component (such as: LuAG:Ce, LuYAG:Ce, YAG:Ce, YGdAG:Ce, etc.) to achieve a blue shift or red shift of the central wavelength. Figure 4 The dotted line in the middle shows the central spectrum of the Ce-doped:YAG wafer. When part of the Y component in the Ce-doped:YAG wafer is replaced by Lu (lutetium), the central wavelength is blue-shifted to the left; but when part of the Y component in the Ce-doped:YAG wafer is replaced by Gd (gadolinium), the central wavelength is red-shifted to the right. It can be understood that the greater the proportion of the Y component in the Ce-doped:YAG wafer being replaced, the greater the amplitude of the blue-shift or red-shift of the central wavelength.

[0060] In this embodiment, the filter 3 is used to filter all wavelengths of light outside the wavelength range of 500 to 700 nm, so that it can be applied to various skin treatment scenarios. Preferably, the cerium-doped: YAG chip 2 and the filter 3 are integrated as a plug-in assembly, which can be installed on the light output side of the pump light source 1 in a pluggable manner. In other embodiments, it can also be replaced by a detachable connection method such as a threaded connection and a snap connection. It can be understood that since the cerium-doped: YAG chip 2 and the filter 3 can be plugged in as a whole, a plurality of plug-in assemblies can be prepared in advance, and then different plug-in assemblies can be selected according to different skin treatment scenarios to output light of different wavelengths.

[0061] In this embodiment, the light guide portion 4 is in a rectangular shape (it can also be replaced with other shapes in other embodiments), which is used for light transmission in the light guide portion 4. As the light is continuously reflected on the inner wall of the light guide portion 4, it is finally gathered to the exit end of the light guide portion 4 (i.e. Figure 2 It can be understood that the incident end of the light guide portion 4 (i.e. Figure 2 The upper end of the light guide portion 4 is used for light to enter the light guide portion 4, and the exit end of the light guide portion 4 (i.e. Figure 2 The lower end of the light guide portion 4 is used to allow light to be emitted from the light guide portion 4, while the interior of the light guide portion 4 needs to prevent light from being emitted to reduce light energy consumption.

[0062] Second embodiment

[0063] like Figure 5 As shown, based on the above first embodiment, the second embodiment of the present invention further provides a device for converting intense pulsed light using a cerium-doped:YAG crystal, comprising a pulse xenon lamp 1, a cerium-doped:YAG wafer 2, a filter 3 and a light guide 4. Compared with the first embodiment, the difference of this embodiment is that the conversion device can also focus the light and cool the skin.

[0064] In the present embodiment, the conversion device further includes a focusing unit 5. The focusing unit 5 is disposed on the light-emitting side of the light guide unit 4, and is used to focus the light output by the light guide unit. Specifically, the focusing unit 5 may be a polygonal fly-eye lens array formed by arranging a plurality of fly-eye lenses, and the polygonal fly-eye lens array may be translated along a preset direction to increase the focal density of yellow-green light with a wavelength range of 500 to 700 nm per unit area. Thus, by focusing the yellow-green light, the energy density of the yellow-green light may be increased, which is beneficial to improving the therapeutic effect on the skin. In another embodiment, the focusing unit 5 may also be a focusing cylindrical lens array, which is used to focus the scattered yellow-green light into yellow-green light stripes.

[0065] In addition, preferably, the conversion device further comprises a sapphire 6 and a cooling unit 7. The sapphire 6 is arranged on the light-emitting side of the focusing unit 5, and is used to contact or separate from the skin; and the cooling unit 7 is mounted on the sapphire 6, and is used to cool the sapphire 6. Therefore, when the yellow-green light is used for beauty treatment, the continuously cooled sapphire 5 is in contact with the skin, which can avoid burns to the skin, thereby ensuring the safety of the treatment and effectively improving the user experience.

[0066] Except for the above differences, other structures of this embodiment are the same as those of the first embodiment and will not be described herein again.

[0067] Third embodiment

[0068] like Figure 6 As shown, the third embodiment of the present invention provides a device for converting intense pulsed light using a cerium-doped:YAG crystal, comprising a pulse xenon lamp 1, a cerium-doped:YAG crystal ring 8, a filter 3 and a light guide 4. Compared with the first embodiment, the difference of this embodiment is that the cerium-doped:YAG crystal ring 8 replaces the original cerium-doped:YAG wafer 2.

[0069] Specifically, in this embodiment, the cerium-doped: YAG crystal ring 8 is sleeved on the outer side of the pulse xenon lamp 1 to absorb ultraviolet light and blue light with a wavelength range of 300 to 500 nm in the intense pulse light, and convert it into yellow-green light with a wavelength range of 500 to 700 nm. It can be understood that the annular cerium-doped: YAG crystal ring 8 can wrap the pulse xenon lamp 1 in all directions, so that the light emitted from the pulse xenon lamp 1 can be converted by the annular cerium-doped: YAG crystal ring 8, thereby further improving the light conversion efficiency.

[0070] Furthermore, preferably, both ends of the cerium-doped:YAG crystal ring 8 can also be sealed with end caps and coated with a reflective film to prevent light from being emitted from both ends and reduce the waste of light energy.

[0071] In addition, a water cooling pipe or direct ventilation cooling is provided between the pulse xenon lamp 1 and the cerium-doped:YAG crystal ring 8, thereby simultaneously achieving heat dissipation for both and ensuring the working efficiency of the pulse xenon lamp 1 and the cerium-doped:YAG crystal ring 8.

[0072] Except for the above differences, the rest of the structure of this embodiment is the same as that of the first embodiment and will not be described again.

[0073] Fourth embodiment

[0074] The fourth embodiment of the present invention further provides a medical cosmetic device, which includes any one of the conversion devices in the first to third embodiments. It is understandable that the medical cosmetic device may also include:

[0075] The control system is connected to the pulse xenon lamp 1 to control the operation of the pulse xenon lamp 1, including the switching of the light, the intensity adjustment and the irradiation time, etc. The control system usually includes an electronic circuit and a microprocessor to achieve precise control and stable performance.

[0076] The external cooling system is connected to the control system and is used to cool down the pulse xenon lamp 1 and other components.

[0077] The shell and the bracket, wherein the shell is used to provide protection for the medical cosmetic equipment, usually with functions such as dustproof and waterproof; the bracket is used to provide support and also provide a comfortable working environment for the operator.

[0078] In summary, the embodiment of the present invention provides a device for converting intense pulsed light using cerium-doped YAG crystal and medical cosmetic equipment, which has the following beneficial effects:

[0079] 1. The cerium-doped:YAG wafer 2 or the cerium-doped:YAG crystal ring 8 can convert ultraviolet light and blue light in the wavelength range of 300 to 500 nm into yellow-green light in the wavelength range of 500 to 700 nm, thereby avoiding directly filtering out ultraviolet light and blue light in the wavelength range of 300 to 500 nm and reducing the energy utilization efficiency of the intense pulsed light.

[0080] 2. The cerium-doped:YAG wafer 2 or the cerium-doped:YAG crystal ring 8 has a preset thickness and a preset doping degree, so that the cerium-doped:YAG wafer 2 or the cerium-doped:YAG crystal ring 8 can achieve a preset light conversion efficiency.

[0081] 3. According to the needs of the yellow-green light center spectrum, a cerium-doped crystal in which Lu (lutetium) or Gd (gadolinium) components are used to replace part or all of the Y (yttrium) component can be selected to achieve a blue shift or red shift of the center wavelength.

[0082] 4. The light conversion efficiency is further improved by coating the two ends of the cerium-doped:YAG wafer 2.

[0083] 5. The cerium-doped: YAG chip 2 and the filter 3 are used as a plug-in component, which can be installed on the light output side of the pump light source 1 in a plug-in manner as a whole, so that different plug-in components can be selected according to different skin treatment scenarios to output light of different bands.

[0084] 6. The focusing part 5 can focus the light output by the light guide part 4, and the sapphire 6 and the cooling part 7 can avoid burns to the skin, ensure the safety of laser treatment, and effectively improve the user experience.

[0085] It should be noted that the above embodiments are only examples, and the technical solutions of the various embodiments can be combined, all within the protection scope of the present invention.

[0086] It should be understood that the terms "thickness", "depth", "up", "down", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0087] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0088] The above is a detailed description of the device for converting intense pulsed light using cerium-doped YAG crystal and medical cosmetic equipment provided by the present invention. For a person skilled in the art, any obvious changes made to the invention without departing from the essence of the invention will constitute an infringement of the patent right of the present invention and will bear the corresponding legal liability.

Claims

1. A device for converting intense pulsed light using a cerium-doped YAG crystal, characterized in that include: A pulsed xenon lamp for emitting intense pulsed light of a preset wavelength; The cerium-doped YAG wafer is arranged on the light-emitting side of the pulse xenon lamp, and is used to absorb the ultraviolet light and blue light with a wavelength range of 300 to 500 nm in the intense pulse light, and convert it into yellow-green light with a wavelength range of 500 to 700 nm; A filter is arranged on the light-emitting side of the cerium-doped:YAG chip and matches the wavelength of the cerium-doped:YAG chip to filter light of other wavelengths except the matching wavelength; The light guide part is arranged on the light output side of the filter and is used for light transmission and light energy output.

2. The conversion device according to claim 1, characterized in that The pulse xenon lamp comprises: Xenon lamp column, used to emit intense pulsed light of a preset wavelength; The focusing reflector is covered on the outside of the xenon lamp column and away from the light-emitting side of the xenon lamp column, and is used for focusing the strong pulse light scattered to the surroundings and reflecting it to the light-emitting side of the xenon lamp column.

3. The conversion device according to claim 1, characterized in that: The incident surface of the cerium-doped: YAG chip is coated with a blue light anti-reflection film and a yellow-green light high-reflection film, and the exit surface of the cerium-doped: YAG chip is coated with a blue light high-reflection film and a yellow-green light anti-reflection film.

4. The conversion device according to claim 1, characterized in that: The cerium-doped:YAG wafer and the filter together form a plug-in assembly, and the plug-in assembly is pluggably installed on the light-emitting side of the pulse xenon lamp for replacing different plug-in assemblies; Among them, different plug-in components correspond to output light of different bands.

5. The conversion device according to claim 1, characterized in that: At least part of the Y component in the cerium-doped:YAG wafer is replaced by Lu component or Gd component to achieve a blue shift or a red shift of the central wavelength; The greater the proportion of the Y component in the cerium-doped:YAG wafer being replaced, the greater the amplitude of the blue shift or red shift of the central wavelength.

6. The conversion device according to claim 1, characterized in that Also includes: The focusing part is arranged on the light output side of the light guide part and is used for focusing the light output by the light guide part.

7. The conversion device according to claim 6, characterized in that Also includes: Sapphire, arranged on the light-emitting side of the focusing portion, for contacting or separating with the skin; The refrigeration unit is mounted on the sapphire and is used to cool the sapphire.

8. The conversion device according to claim 1, characterized in that: The cerium-doped:YAG wafer has a preset thickness and a preset doping degree, so that the cerium-doped:YAG wafer can achieve a preset light conversion efficiency.

9. A device for converting intense pulsed light using a cerium-doped YAG crystal, characterized in that include: A pulsed xenon lamp for emitting intense pulsed light of a preset wavelength; The cerium-doped YAG crystal ring is sleeved on the outer side of the pulse xenon lamp and is used to absorb the ultraviolet light and blue light with a wavelength range of 300 to 500 nm in the intense pulse light and convert it into yellow-green light with a wavelength range of 500 to 700 nm; A filter is arranged on the light-emitting side of the cerium-doped:YAG chip and matches the wavelength of the cerium-doped:YAG chip to filter light of other wavelengths except the matching wavelength; The light guide part is arranged on the light output side of the filter and is used for light transmission and light energy output.

10. A medical cosmetic device, characterized in that A conversion device comprising any one of claims 1 to 9.

Images