CN219185054U - Continuous tunable deep ultraviolet laser disinfection device - Google Patents
Continuous tunable deep ultraviolet laser disinfection device Download PDFInfo
- Publication number
- CN219185054U CN219185054U CN202220896782.1U CN202220896782U CN219185054U CN 219185054 U CN219185054 U CN 219185054U CN 202220896782 U CN202220896782 U CN 202220896782U CN 219185054 U CN219185054 U CN 219185054U
- Authority
- CN
- China
- Prior art keywords
- mirror
- deep ultraviolet
- laser
- ultraviolet laser
- degree mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The application provides a continuously tunable deep ultraviolet laser killing device, which comprises a shell, wherein a deep ultraviolet laser is arranged in the shell and is connected with a scanning lens through a beam shaping system, the deep ultraviolet laser is connected with a control system, and the control system is connected with the scanning lens; the deep ultraviolet laser comprises a pumping source I, wherein a total reflecting mirror, a laser working substance, a reflecting mirror, a birefringent filter, an output mirror and a frequency doubling crystal are sequentially arranged behind the pumping source I, a frequency doubling crystal is arranged at the lower part of the frequency doubling crystal, and a pumping source II is further arranged at one side of the reflecting mirror; in the application, the deep ultraviolet light in the Ultraviolet (UVC) wave band (200-280 nm) has strong sterilizing capability, can directly interrupt RNA transcription and DNA replication, and causes cell mutation or death and loss of replication capability, so that strong sterilizing effect on microorganisms such as viruses, bacteria and the like is generated; the deep ultraviolet laser of UVC wave band can obtain the quick, high-efficiency, long-distance and environment-friendly disinfection effect.
Description
Technical Field
The application relates to the technical field of disinfection, in particular to a continuous tunable deep ultraviolet laser disinfection device.
Background
The sterilization effect of ultraviolet radiation on bacteria and viruses has been verified on common bacteria and viruses, and ultraviolet radiation is a broad-spectrum sterilization and disinfection mode; experimental research shows that when the accumulated ultraviolet dose received by most bacteria and viruses reaches 20mJ, the inactivation rate can reach more than 99%. In addition, UV-C ultraviolet sterilization does not produce any secondary pollutant, when various bacterial viruses on the surface of an object are irradiated by ultraviolet UV-C waves, ultraviolet rays penetrate cell membranes and cell nuclei of microorganisms, thymine dimer formation and crosslinking of DNA chains are induced, a light product causes structural deformation of DNA, RNA transcription and DNA replication are interrupted, finally, cell mutation or death is caused, cells cannot reproduce, and the microorganisms die soon; on the other hand, the radiation energy ionizes oxygen in the air into oxygen ions, which in turn oxidize the oxygen to ozone or oxidize the water to hydrogen peroxide. Ozone and hydrogen peroxide have bactericidal effects.
Deep ultravioletSterilization is an effective technical means for broad-spectrum sterilization; 253.7nm ultraviolet rays can effectively destroy genetic materials (DNA or RNA) of microorganisms, so that bacteria, viruses and the like cannot complete replication and transcription of the genetic materials, a great deal of research work on ultraviolet lamps and ultraviolet LED disinfection is carried out by a plurality of students at home and abroad at present, and the research team of expert Dong Xiaoping of the national center for prevention and control of viral diseases discovers that the ultraviolet lamps with 253.7nm are adopted and have the emission power density of 90 mu W/cm 2 Can kill viruses in 60 minutes by irradiating the viruses with UVC, and is proved by Paul J.Meechan team of Merck laboratories in 2006 to have irradiance of 40W/cm 2 In (3) the spore-forming organisms can be killed in 12.5 minutes; in 2007, berrin Ozcelik et al confirmed that 253.7nm ultraviolet light source was 30cm away from the object, and that fungi and bacteria on the surface of the object such as coins and scissors could be killed in 45 minutes, and in 2015, soo-Ji Kim et al experiments at the university of first-class national university found that the deactivation effect of UV-LEDs at 266nm and 270nm was significantly different from other wavelength modules, at 3mJ/cm 2 Only irradiating cheese slices for about 10 minutes can inactivate about 99.99% of pathogens without affecting quality and without producing a large number of injured cells, but UV-LEDs can only be fixed at specific wavelengths, which represents a need for a tunable multi-purpose UV laser.
UVC has the strongest bactericidal effect and is widely used to inactivate microorganisms in the form of mercury lamps, however, ultraviolet mercury lamps have several key limitations; firstly, the ultraviolet lamp is fragile, so that mercury leakage is likely to occur due to breakage when any impact is applied, in addition, the preheating time is long, the maximum effect cannot be exerted at low temperature, the traditional ultraviolet equipment has small penetrability, and the ultraviolet lamp is only suitable for sterilization of an aseptic chamber, an inoculation box, air in an operating room and the surface of an object, the distance between the ultraviolet lamp and the irradiated object is not more than 1.2m, the energy is low, and a long time is required to achieve a good sterilization effect; for the ultraviolet lamp, the emitted ultraviolet intensity is only 90 mu W.s/cm 2 The irradiation dose of the ultraviolet lamp is higher than 3.5 hours for killing 99.99 percent of viruses, and the ultraviolet laser has high power density, high peak power and high directionality, compared with the traditional ultraviolet lamp in the sterilization time, sterilization distance and sterilizationThe sterilization efficiency is improved by several orders of magnitude, and the ultraviolet laser has the advantages of wide sterilization spectrum, short sterilization time, long sterilization distance, low use cost and the like, the peak power emitted by the ultraviolet laser can reach 10-50kW, and the peak power density can reach 1 multiplied by 10 12 μW/cm 2 -5×10 12 μW/cm 2 Therefore, the time for killing bacteria and viruses is greatly reduced by utilizing the high peak power characteristic of the laser, even the laser can quickly catch the viruses flowing at high speed and instantly kill the viruses, and in addition, the scattered light has high intensity enough to kill the viruses, so that the killing area and volume can be greatly improved, and dead angle-free killing is even achieved.
In addition, because the ultraviolet laser has high directionality, even if the ultraviolet laser propagates a distance of hundreds of meters, the energy can be concentrated in a small light spot range, and the energy has the advantage of high concentration, the remote sterilizing laser has absolute advantage, the sterilizing distance of the ultraviolet laser can be conservatively estimated to be hundreds of meters, and the ultraviolet laser is particularly suitable for large-scale sterilizing scenes such as terminal buildings, railway stations, stadiums, camps and the like, and the requirements of large-scale public places such as airlines, hotels and retail spaces on sterilizing the ultraviolet laser are higher in face of epidemic situations.
In summary, in order to overcome the disadvantages of low irradiation power density, short action distance and low efficiency of the conventional ultraviolet lamp during the long-term sterilization, a deep ultraviolet laser sterilization method is needed to solve the above technical problems.
Disclosure of Invention
The application provides a continuous tunable deep ultraviolet laser disinfection device, which comprises a shell, wherein a deep ultraviolet laser is arranged in the shell, the deep ultraviolet laser is connected with a scanning lens through a beam shaping system, the deep ultraviolet laser is also connected with a control system through a laser communication cable, and the control system is connected with the scanning lens through a scanning lens communication cable; the deep ultraviolet laser comprises a pumping source I, wherein a total reflecting mirror, a laser working substance, a reflecting mirror, a birefringent filter, an output mirror and a frequency doubling crystal are sequentially arranged behind the pumping source I, a frequency doubling crystal is arranged at the lower part of the frequency doubling crystal, and a pumping source II is further arranged on one side of the reflecting mirror.
As a preferable mode, the laser working substance is titanium sapphire crystal.
As a preferred solution, the deep ultraviolet laser achieves continuous wavelength tuning in the wavelength range of 233-300 nm.
As a preferable scheme, the deep ultraviolet laser is operated in a continuous mode.
As a preferable scheme, the deep ultraviolet laser is operated in a pulse mode or a quasi-continuous mode.
As a preferable scheme, a Q-switching device is arranged between the birefringent filter and the output mirror.
As a preferable scheme, the Q-switching device is an electro-optic Q-switching crystal, an acousto-optic Q-switching crystal or a passive Q-switching crystal.
As a preferable scheme, the center wavelength of the output of the first pump source and the output of the second pump source is 450nm.
As a preferable scheme, the frequency doubling crystal is a frequency doubling crystal, the frequency doubling crystal is one of LBO, BBO, CLBO, biBO, and the matching mode can adopt critical phase matching or non-critical phase matching.
As a preferable scheme, the frequency tripled crystal is one of BBO and CLBO, and the matching mode adopts critical phase matching.
As a preferable scheme, the beam shaping system comprises a second 45-degree mirror, a third 45-degree mirror is arranged behind the second 45-degree mirror, a first laser focusing mirror and a fourth 45-degree mirror are sequentially arranged at the lower part of the second 45-degree mirror, a fifth 45-degree mirror is arranged at one side of the fourth 45-degree mirror, a sixth 45-degree mirror is arranged at the lower part of the fifth 45-degree mirror, a seventh 45-degree mirror is arranged at one side of the sixth 45-degree mirror, an eighth 45-degree mirror is arranged at the lower part of the seventh 45-degree mirror, and a sum frequency crystal, an optical filter, an ultraviolet laser collimating mirror and a vibrating mirror are sequentially arranged at one side of the eighth 45-degree mirror; the other side of the 45-degree mirror eight is provided with a 45-degree mirror nine, the upper part of the 45-degree mirror nine is sequentially provided with a laser focusing mirror II and a wave plate, and the upper part of the wave plate is provided with a 45-degree mirror III.
The utility model comprises the following steps: the device comprises a deep ultraviolet laser, a first pumping source, a second pumping source, a total reflecting mirror, a laser working substance, an output mirror, a frequency doubling crystal, a frequency tripling crystal, a beam shaping system, a scanning lens, a control system and a shell; the deep ultraviolet light in the Ultraviolet (UVC) wave band (200-280 nm) has strong disinfection capability, can directly interrupt RNA transcription and DNA replication, causes cell mutation or death and loses replication capability, thereby generating strong disinfection effect on microorganisms such as viruses, bacteria and the like; the titanium precious stone laser has the advantages of high brightness, high directivity, high monochromaticity and high power density, can realize wavelength tuning, and is suitable for different killing scenes; if a pulse pumping or Q-switching working mode is adopted, the maximum peak power can be obtained under lower average power, so that the sterilization speed of bacteria and viruses is improved, and the sterilization effect of bacteria and viruses on the surface of an object and in the air can be realized by adopting the deep ultraviolet laser of UVC wave band, so that the rapid, efficient, long-distance and environment-friendly sterilization effect is obtained.
Drawings
FIG. 1 is a schematic structural view of the present application;
FIG. 2 is a schematic structural view of a third embodiment of the present application;
FIG. 3 is a schematic structural view of a fourth embodiment of the present application;
1. the laser comprises a shell 2, a deep ultraviolet laser 3, a beam shaping system 4, a scanning lens 5, a laser communication cable 6, a control system 7, a scanning lens communication cable 8, a pump source I9, a total reflection mirror 10, a laser working substance 11, a reflection mirror 12, a birefringent filter 13, an output mirror 14, a frequency doubling crystal 15, a frequency doubling crystal 16, a pump source II 17, an energy transmission optical fiber 18, a collimating lens 19, a focusing lens 20, a flat concave mirror 21, a 45 degree mirror I22, a laser focusing mirror 23, a frequency doubling crystal 24, a 45 degree mirror II 25, a 45 degree mirror III 26, a laser focusing mirror I27, a 45 degree mirror IV 28, a 45 degree mirror V29, a 45 degree mirror VI 30, a 45 degree mirror V31, a 45 degree mirror V32, a sum frequency crystal 33, a filter 34, an ultraviolet laser collimating mirror 35, a vibrating mirror 36, a 45 degree mirror V37, a laser focusing mirror II 38, a 39, an energy transmission optical fiber I40, a collimating lens I41, a focusing lens I42 and a Q-adjusting device.
Detailed Description
The following detailed description of specific embodiments of the utility model refers to the accompanying drawings; it should be noted that the detailed description herein is presented for purposes of illustration and explanation only and is not intended to limit the utility model.
Embodiment one:
the embodiment provides a continuously tunable deep ultraviolet laser disinfection device, in particular to a 233-300nm deep ultraviolet laser disinfection device based on triple frequency of a titanium precious stone laser, which can be used for improving disinfection speed and efficiency of viruses and bacteria and increasing disinfection range.
The continuously tunable deep ultraviolet laser disinfection device comprises a shell 1, wherein a deep ultraviolet laser 2 is arranged in the shell 1, the deep ultraviolet laser 2 is operated in a pulse operation mode, a continuous operation mode or a quasi-continuous operation mode, and the deep ultraviolet laser 2 realizes continuous wavelength adjustment in a wavelength range of 233-300 nm; the deep ultraviolet laser 2 can realize wavelength conversion without changing laser crystal and laser working substance, and has accurate output wavelength and narrow line width; the deep ultraviolet laser 2 is connected with the scanning lens 4 through the beam shaping system 3, the deep ultraviolet laser 2 is also connected with the control system 6 through the laser communication cable 5, the control system 6 is preferably a singlechip in the prior art, and the specific model is not limited specifically; the control system 6 is connected with the scanning lens 4 through a scanning lens communication cable 7; the scanning lens 4 is preferably a galvanometer scanning in the prior art, and can perform point-by-point scanning and line-by-line scanning and killing by the galvanometer scanning mode, and can also shape linear light beams for scanning output and couple the linear light beams into optical fibers for scanning output after transmission.
Specifically, the deep ultraviolet laser 2 includes a pump source one 8, a total reflection mirror 9, a laser working substance 10, a reflection mirror 11, a birefringent filter 12, an output mirror 13, and a frequency doubling crystal 14 are sequentially arranged behind the pump source one 8, a frequency doubling crystal 15 is arranged at the lower part of the frequency doubling crystal 14, and a pump source two 16 is also arranged at one side of the reflection mirror 11; the arrangement of the first pump source 8 and the second pump source 16 makes the pumping mode of the embodiment double-end pumping; the central wavelength output by the first pumping source 8 and the second pumping source 16 is 450nm; the frequency doubling crystal 14 is a frequency doubling crystal, the frequency doubling crystal is one of LBO, BBO, CLBO, biBO, and the matching mode can adopt critical phase matching or non-critical phase matching; the frequency tripling crystal 15 adopts one of BBO and CLBO, and the matching mode adopts critical phase matching.
Preferably, the reflecting mirror 11 is a 45 ° reflecting mirror in the prior art, preferably, the total reflecting mirror 9 is a flat concave mirror, and preferably, the laser working substance 10 is a titanium sapphire crystal.
The first pumping source 8 emits pumping light to pump the laser working substance 10 through the flat concave mirror, the second pumping source 16 emits pumping light to pump the laser working substance 10 through the 45-degree reflecting mirror, the flat concave mirror and the output mirror 13 form a fundamental frequency light resonant cavity, the oscillating fundamental frequency light is output by the output mirror, the oscillating fundamental frequency light is converted into deep ultraviolet laser after being subjected to frequency doubling crystal 14 and frequency summation crystal, the deep ultraviolet laser is shaped through the beam shaping system 3, and the shaped deep ultraviolet laser is incident into the scanning lens 4.
The pump source I8 and the pump source II 16 form a double-end pump structure, pump light is emitted, a laser working substance 10 is pumped through the total reflection mirror 9, the total reflection mirror 9 and the output mirror 13 form a fundamental frequency light resonant cavity, the oscillating fundamental frequency light is output by the output mirror 13, the oscillating fundamental frequency light is converted into deep ultraviolet laser light after passing through the frequency doubling crystal 14 and the frequency doubling crystal 15, the deep ultraviolet laser light is shaped through the beam shaping system 3, the shaped deep ultraviolet laser light is incident into the scanning lens 4, and the control system 6 controls the output power, energy, peak power, pulse frequency and switching light time sequence of the deep ultraviolet laser 2; the control system 6 controls the scanning speed, the scanning path and the scanning range of the scanning lens 4; the birefringent filters 12 with different rotation angles can enable the deep ultraviolet laser 2 to output different signal light wavelengths, and the deep ultraviolet laser output with different wavelengths can be obtained after frequency multiplication by three.
In order to overcome the defects of low irradiation power density, short acting distance and low long-term consumption efficiency of the traditional ultraviolet lamp, the embodiment provides a deep ultraviolet laser sterilizing mode, and the deep ultraviolet laser 2 based on the titanium precious stone can continuously tune and ensure the characteristics of accurate wavelength and narrow linewidth, so that bacterial viruses can be sterilized more accurately, and meanwhile, the titanium precious stone laser is more stable and longer in service life, and can realize tunable ultraviolet laser output of 233-300nm without changing crystals.
Embodiment two:
in this embodiment, the deep ultraviolet laser 2 is operated in a pulse mode or a quasi-continuous mode, and the pump source one 8 and the pump source two 16 are semiconductor lasers outputting continuous laser; in this embodiment, a Q-switching device is disposed between the birefringent filter 12 and the output mirror 13, and pulse titanium sapphire laser is realized by the Q-switching device.
Preferably, the Q-switching device is an electro-optic Q-switching crystal, an acousto-optic Q-switching crystal or a passive Q-switching crystal.
Embodiment III:
the embodiment provides a specific implementation scheme, namely a deep ultraviolet laser killing device with 233-300nm triple frequency for a pulse LD pumping titanium precious stone laser, as shown in figure 2:
the laser energy-saving device comprises a first pumping source 8, an energy-transmitting optical fiber 17, a collimating lens 18, a focusing lens 19, a plano-concave mirror 20, a laser working substance 10, a first 45-degree mirror 21, a birefringent filter 12, an output mirror 13, a laser focusing mirror 22, a double frequency crystal 23, a second 45-degree mirror 24 and a third 45-degree mirror 25 are sequentially arranged behind the first pumping source 8, a first laser focusing mirror 26 and a fourth 45-degree mirror 27 are sequentially arranged at the lower part of the second 45-degree mirror 24, a fifth 45-degree mirror 28 is arranged at one side of the fourth 45-degree mirror 27, a sixth 45-degree mirror 29 is arranged at the lower part of the fifth 45-degree mirror 28, a seventh 45-degree mirror 30 is arranged at one side of the sixth 45-degree mirror 29, an eighth 45-degree mirror 31 is arranged at one side of the seventh 45-degree mirror 30, and a sum frequency crystal 32, a filter 33, an ultraviolet laser collimating mirror 34 and a vibrating mirror 35 are sequentially arranged at one side of the eighth 45-degree mirror 31; a 45-degree mirror nine 36 is arranged on the other side of the 45-degree mirror eight 31, a laser focusing mirror two 37 and a wave plate 38 are sequentially arranged on the upper portion of the 45-degree mirror nine 36, and a 45-degree mirror three 25 is arranged on the upper portion of the wave plate 38; one side of the first 45-degree mirror 21 is also provided with a second pump source 16, and an energy transmission optical fiber 39, a first collimating lens 40 and a first focusing lens 41 are sequentially arranged between the second pump source 16 and the first 45-degree mirror 21.
The pump source I8 emits pump light, the pump light passes through the energy-transmitting optical fiber 17, the collimating lens 18 and the focusing lens 19 are used for collimation and focusing, then the pump light passes through the plano-concave mirror 20 and is coupled into the laser working substance 10, the pump light emitted by the pump source II 16 passes through the energy-transmitting optical fiber I39, the collimating lens I40 and the focusing lens I41 are used for collimation and focusing, then the pump light passes through the collimating lens I21 and is coupled into the laser working substance 10, the laser working substance 10 forms a necessary condition for laser formation under the action of the pump light, laser oscillation is generated in a resonant cavity formed by the plano-concave mirror 20 and the output mirror 13, the oscillation light realizes fundamental frequency laser output with different wavelengths (700-900 nm) under the action of the birefringent filter 12, fundamental frequency laser is coupled into the double frequency crystal 23 through the laser focusing mirror 22 to generate double frequency light (350-450 nm), the double frequency light enters into a phase delay device composed of the 45-degree mirror IV 27, the 45-degree mirror IV 29 and the 45-degree mirror IV 30 through the laser focusing mirror IV 26, the phase delay device is adjusted by adjusting the distance of the phase delay device, and thus the phase matching of the double frequency laser with the fundamental frequency mode is realized in the sum frequency mode; the fundamental frequency light enters the sum frequency crystal 32 through the eighth 45-degree mirror 31, the propagation direction of the fundamental frequency light is changed through the third 45-degree mirror, polarization adjustment is performed through the wave plate 38, focusing is performed through the second laser focusing mirror 37, the propagation direction of the fundamental frequency light is changed through the ninth 45-degree mirror 36, the fundamental frequency light enters the sum frequency crystal 32 and the frequency doubling light are subjected to sum frequency generation and sum frequency light (233-300 nm) output, the filter 33 enables the sum frequency laser to pass through, unconverted fundamental frequency light and frequency doubling light are filtered out, the sum frequency laser is collimated through the ultraviolet laser collimating mirror 34, and the collimated frequency doubling ultraviolet laser is subjected to point-by-point and line-by-line scanning through the vibrating mirror 35, so that viruses are killed remotely and in a large range.
As a preferable scheme, the total output light power of the first pump source 8 and the second pump source 16 is 27W, the center wavelength is 450nm, the repetition frequency is 10kHz, the core diameters of the energy transmission optical fiber 17 and the energy transmission optical fiber 39 are 400 mu m, and the numerical aperture is 0.22.
As a preferred solution, the focal length of the collimating lens 18 and the collimating lens 40 is 20mm, and the focal length of the focusing lens 18 and the focusing lens 40 is 30mm, which form a 1:1 coupling focusing system for focusing the pump light on the laser working substance 10.
As a preferable scheme, the total reflecting mirror 9 is a plano-concave mirror, and is plated with a film system with high transmittance of 450nm and high reflection of 700-900 nm; the frequency doubling crystal 14 adopts a frequency summation crystal 32; the scanning lens 4 adopts an existing galvanometer 35.
As a preferable scheme, the 45-degree mirror 21 is coated with a film system with 450nm high reflection and 700-900nm high transmission, and is used for realizing double-end pumping to increase pumping power and simultaneously relieving the thermal effect of the titanium precious stone.
As a preferable scheme, the laser working substance 10 is a titanium sapphire crystal, the length of the laser working substance in the light transmission direction is 15mm, the section is square with a side length of 5mm, the crystal is placed on a red copper heat sink controlled on a semiconductor refrigerator at brewster angle relative to pump laser, and the temperature of a copper block is set to be 17 ℃.
As a preferable scheme, the output mirror 13 is a plane mirror, a film system with the transmittance of 700-900nm being 15% is plated, and the length of a resonant cavity formed by the total reflection mirror 9 and the output mirror 13 is 200mm.
As a preferable scheme, the frequency doubling crystal (frequency doubling crystal) 14 is an LBO crystal, the specification is 3 multiplied by 10mm, and high-permeability film systems of 700-900nm and 350-450nm are plated at two ends of the crystal.
As a preferable scheme, the sum frequency crystal 32 is BBO crystal, the specification is 3 multiplied by 10mm, and both ends of the crystal are plated with anti-reflection film systems of 700-900nm, 350-450nm and 233-300 nm.
As a preferable scheme, the optical filter 33 is plated with a film system with high reflection to 700-900nm and 350-450nm wave bands and anti-reflection to 233-300nm wave bands, and the residual fundamental frequency light after the sum frequency is filtered;
as a preferred scheme, the ultraviolet laser collimator 34 couples the filtered 233-300nm band deep ultraviolet laser into the scanning galvanometer 35 to scan the object to be examined.
Embodiment four:
the present example provides another specific embodiment, which is a deep ultraviolet laser killing device with 233-300nm frequency tripled for an electro-optic Q-switched titanium precious stone laser, as shown in fig. 3:
the internal structure is as in the third embodiment, and the difference is that the first pump source 8 and the second pump source 16 are semiconductor lasers outputting continuous laser, and the Q-switching device 42 is arranged in the resonant cavity of the titanium sapphire laser, and the Q-switching device 42 is arranged between the birefringent filter 12 and the output mirror 13; in the embodiment, an electro-optical Q-switching element is preferentially adopted, and pulse titanium sapphire laser is realized in an electro-optical Q-switching mode; in order to keep the voltage on the loaded electro-optical crystal synchronous with the wavelength tuning, a singlechip is used for controlling the rotation of the birefringent filter and the Q-switched voltage, so that the Q-switched pulse output is realized under the condition of different wavelength tuning.
The above embodiments are only preferred examples of the present utility model and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model should be included in the scope of the present utility model.
The utility model comprises a deep ultraviolet laser 2, a first pumping source 8, a second pumping source 16, a total reflecting mirror 9, a laser working substance 10, an output mirror 13, a frequency doubling crystal 14, a frequency tripling crystal 15, a beam shaping system 3, a scanning lens 4, a control system 6 and a shell 1; the deep ultraviolet light in the Ultraviolet (UVC) wave band (200-280 nm) has strong disinfection capability, can directly interrupt RNA transcription and DNA replication, causes cell mutation or death and loses replication capability, thereby generating strong disinfection effect on microorganisms such as viruses, bacteria and the like; the titanium precious stone laser has the advantages of high brightness, high directivity, high monochromaticity and high power density, can realize wavelength tuning, and is suitable for different killing scenes; if a pulse pumping or Q-switching working mode is adopted, the maximum peak power can be obtained under lower average power, so that the sterilization speed of bacteria and viruses is improved, and the sterilization effect of bacteria and viruses on the surface of an object and in the air can be realized by adopting the deep ultraviolet laser of UVC wave band, so that the rapid, efficient, long-distance and environment-friendly sterilization effect is obtained.
The above devices, connection relationships, etc. which are not specifically described belong to the prior art, and the present utility model is not specifically described herein.
The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the foregoing embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations of the present utility model are not described in detail.
Moreover, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which is also to be considered as disclosed herein.
Claims (7)
1. The continuously tunable deep ultraviolet laser sterilizing device comprises a shell (1) and is characterized in that a deep ultraviolet laser (2) is arranged in the shell (1), the deep ultraviolet laser (2) is connected with a scanning lens (4) through a beam shaping system (3), the deep ultraviolet laser (2) is also connected with a control system (6) through a laser communication cable (5), and the control system (6) is connected with the scanning lens (4) through a scanning lens communication cable (7); the deep ultraviolet laser (2) comprises a first pumping source (8), wherein a total reflecting mirror (9), a laser working substance (10), a reflecting mirror (11), a birefringent filter (12), an output mirror (13) and a frequency doubling crystal (14) are sequentially arranged behind the first pumping source (8), a frequency doubling crystal (15) is arranged at the lower part of the frequency doubling crystal (14), and a second pumping source (16) is further arranged on one side of the reflecting mirror (11).
2. A continuously tunable deep ultraviolet laser disinfection device according to claim 1, characterized in that the laser working substance (10) is a titanium sapphire crystal.
3. The continuously tunable deep ultraviolet laser sterilizing device according to claim 1, wherein a Q-switching device (42) is arranged between the birefringent filter (12) and the output mirror (13).
4. A continuously tunable deep ultraviolet laser disinfection device according to claim 3, wherein the Q-switched device (42) is one of an electro-optic Q-switched crystal, an acousto-optic Q-switched crystal or a passive Q-switched crystal.
5. The continuously tunable deep ultraviolet laser sterilizing device according to claim 1, wherein the center wavelength of the output of the pump source one (8) and the pump source two (16) is 450nm.
6. The continuously tunable deep ultraviolet laser disinfection device according to claim 1, wherein the beam shaping system (3) comprises a 45-degree mirror two (24), a 45-degree mirror three (25) is arranged behind the 45-degree mirror two (24), a laser focusing mirror one (26) and a 45-degree mirror four (27) are sequentially arranged at the lower part of the 45-degree mirror two (24), a 45-degree mirror five (28) is arranged at one side of the 45-degree mirror four (27), a 45-degree mirror six (29) is arranged at the lower part of the 45-degree mirror five (28), a 45-degree mirror seven (30) is arranged at one side of the 45-degree mirror six (29), a 45-degree mirror eight (31) is arranged at the lower part of the 45-degree mirror seven (30), and a sum frequency crystal (32), a filter (33), an ultraviolet laser collimating mirror (34) and a vibrating mirror (35) are sequentially arranged at one side of the 45-degree mirror eight (31); the other side of the 45-degree mirror eight (31) is provided with a 45-degree mirror nine (36), the upper part of the 45-degree mirror nine (36) is sequentially provided with a laser focusing mirror two (37) and a wave plate (38), and the upper part of the wave plate (38) is provided with a 45-degree mirror three (25).
7. The continuously tunable deep ultraviolet laser sterilizing device according to any one of claims 1 to 6, wherein the frequency tripler crystal (15) is one of BBO and CLBO, and the matching mode adopts critical phase matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220896782.1U CN219185054U (en) | 2022-04-18 | 2022-04-18 | Continuous tunable deep ultraviolet laser disinfection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220896782.1U CN219185054U (en) | 2022-04-18 | 2022-04-18 | Continuous tunable deep ultraviolet laser disinfection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219185054U true CN219185054U (en) | 2023-06-16 |
Family
ID=86708979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220896782.1U Active CN219185054U (en) | 2022-04-18 | 2022-04-18 | Continuous tunable deep ultraviolet laser disinfection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219185054U (en) |
-
2022
- 2022-04-18 CN CN202220896782.1U patent/CN219185054U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207782132U (en) | A kind of Solid State Laser array beam merging apparatus | |
| CN101777724B (en) | End-pumped dual-wavelength coaxial switching output Q-switched base-frequency and double-frequency laser | |
| Agnesi et al. | Efficient wavelength conversion with high-power passively Q-switched diode-pumped neodymium lasers | |
| CN101572379B (en) | Three-band pulsing laser | |
| CN113036587A (en) | Amplified mid-infrared laser based on erbium-doped single crystal fiber seed light source | |
| CN102163793A (en) | Multiple extra-cavity frequency conversion ultraviolet laser | |
| CN219185054U (en) | Continuous tunable deep ultraviolet laser disinfection device | |
| CN101814692A (en) | Medicinal all-solid-state yellow laser | |
| WO2015024094A1 (en) | Uv apparatus and method for air disinfection | |
| CN112421355B (en) | Device and method for directly generating stable multi-beam pulse ultraviolet laser | |
| CN219185056U (en) | Deep ultraviolet laser disinfection device safe to human body | |
| CN116942863A (en) | Continuously tunable deep ultraviolet laser disinfection device and disinfection method thereof | |
| CN105896261B (en) | All solid state broad tuning LONG WAVE INFRARED laser source | |
| Li et al. | Optical and laser properties of Pr3+: YLF crystal | |
| CN206878308U (en) | A kind of middle infrared solid laser | |
| CN219208203U (en) | Deep ultraviolet laser disinfection device | |
| Luo et al. | All-solid-state far-UVC pulse laser at 222 nm wavelength for UVC disinfection | |
| CN219185055U (en) | Tunable ultraviolet laser disinfection device safe for human body | |
| CN203895738U (en) | Device used for generating high-mean-power quasi-continuous ultraviolet pulse laser | |
| Creeden et al. | Pulsed Tm-doped fiber lasers for mid-IR frequency conversion | |
| CN116966326A (en) | Deep ultraviolet laser disinfection device | |
| CN202749676U (en) | End-pumped dual-wavelength coaxial switching output laser device | |
| CN117224715A (en) | Deep ultraviolet laser disinfection device and disinfection method safe to human body | |
| CN116942864A (en) | Tunable ultraviolet laser disinfection device and method safe to human body | |
| WO2022181676A1 (en) | 215-222 nm wavelength laser beam generating apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |