Laser capable of realizing safe voltage discharge

Abstract

The utility model discloses a laser capable of realizing safe voltage discharge, which relates to the field of laser control, and comprises a light emitting unit, an energy supply unit and a control unit, and the light emitting side of the light emitting unit is provided with an optical shutter; the energy supply unit comprises an energy storage capacitor for supplying energy to the light emitting unit; the control unit comprises a microprocessor used for controlling the opening and closing states of the optical shutter. The microprocessor drives the energy storage capacitor to supply energy to the light emitting unit, and controls the optical shutter to be in a closed state to shield a reflection light path in the light emitting unit, so that laser formation is prevented, and pressure relief of the energy storage capacitor is realized; or, the microprocessor drives the energy storage capacitor to supply energy to the light emitting unit, the microprocessor drives the light emitting unit to generate non-pulse laser, and the optical shutter is controlled to be in a closed state to shield the non-pulse laser, so that pressure relief of the energy storage capacitor is realized. According to the utility model, rapid and efficient safe pressure relief of the energy storage capacitor of the laser can be realized, and the pressure relief cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of laser control, in particular to a laser capable of realizing safe voltage discharge. Background Art

[0002] Lasers are divided into continuous lasers and pulsed lasers based on their operating modes. Holmium lasers are pulsed lasers, and their operating mode is to emit light in a pulsed mode. The holmium laser stone treatment device emits holmium lasers with a pulse width of 300 microseconds and a frequency of 20 Hz to the outlet, and breaks up the stones through the high peak power generated instantly to achieve the purpose of treatment. For example, when the average power is 60W, the peak power = average power / pulse width / repetition frequency = 60 / 0.0003 / 20 = 10000W, thereby instantly generating a peak power of 10000W, such as Figure 2 As shown, this is the peak power diagram of the holmium laser when it is emitting light normally.

[0003] For holmium laser stone treatment device, when the treatment is finished or the power needs to be reduced (i.e., the charging voltage of the capacitor group in the treatment device is reduced), the energy storage capacitor voltage of the holmium laser needs to be discharged. The current common method is to discharge the voltage on the energy storage capacitor through a discharge circuit. Specifically, Figure 1 As shown, the voltage divider measures the voltage of the energy storage capacitor, and compares it with the set voltage value (i.e., the safety voltage value) in the comparator. If it is greater than the set voltage value, the AND gate is opened. After receiving the microprocessor instruction, the discharge tube is turned on through the AND gate, and the charging voltage in the energy storage capacitor is discharged through the resistor until the voltage charged by the energy storage capacitor is less than the set voltage value. Then the AND gate is closed to cut off the discharge tube, and the energy storage capacitor stops discharging voltage.

[0004] However, due to the high voltage on the energy storage capacitor, the current is large and the time is long when it is discharged to a safe voltage. The existing method of realizing the voltage discharge of the energy storage capacitor in the holmium laser stone therapeutic device through the discharge circuit generally takes more than 5 seconds. When the holmium laser stone therapeutic device faces a voltage discharge situation during use and performs voltage discharge, its optical fiber is still in the patient's body, and the treatment can only continue after the voltage discharge is completed. The longer the waiting time for voltage discharge, the longer the total treatment time for the patient, and the treatment risk increases accordingly; at the same time, due to the high voltage and large current when the energy storage capacitor voltage is discharged, there are corresponding high requirements for the performance of the components of the discharge circuit, which increases the cost of the holmium laser stone therapeutic device. Therefore, how to quickly and efficiently realize the voltage discharge of the energy storage capacitor in the holmium laser stone therapeutic device at low cost has become a problem that needs to be solved urgently. Utility Model Content

[0005] The present application provides a laser that can achieve safe voltage discharge, which can achieve fast and efficient safe pressure discharge of energy storage capacitors and reduce the cost of pressure discharge.

[0006] The embodiment of the present application provides a laser capable of achieving safe voltage discharge, including:

[0007] A light emitting unit, wherein a light shutter is provided on the light emitting side thereof;

[0008] An energy supply unit, comprising an energy storage capacitor for supplying energy to the light emitting unit;

[0009] A control unit, comprising a microprocessor for controlling the opening and closing state of the optical shutter;

[0010] The microprocessor drives the energy storage capacitor to supply energy to the light output unit, controls the optical shutter to be in a closed state to block the reflected light path in the light output unit, thereby preventing the formation of laser and achieving pressure relief of the energy storage capacitor; or

[0011] The microprocessor drives the energy storage capacitor to supply energy to the light output unit, and the microprocessor drives the light output unit to generate non-pulsed laser, controls the optical shutter to be in a closed state to block the non-pulsed laser, and realizes pressure relief of the energy storage capacitor.

[0012] In one embodiment,

[0013] The optical gate is a second optical gate located between the reflection optical paths of the light emitting unit, and the second optical gate is close to the light emitting side of the light emitting unit;

[0014] When the microprocessor drives the energy storage capacitor to supply energy to the light output unit, the second optical shutter is controlled to be in a closed state to block the reflected light path and prevent the light output unit from generating laser, thereby achieving pressure relief of the energy storage capacitor.

[0015] In one embodiment,

[0016] The optical shutter is a third optical shutter located at the front end of the light emitting side of the light emitting unit;

[0017] The microprocessor drives the energy storage capacitor to supply energy to the light output unit. When the light output unit generates non-pulsed laser, the third optical gate is controlled to be in a closed state to shield the non-pulsed laser, thereby achieving pressure relief of the energy storage capacitor.

[0018] In one embodiment, the control unit further comprises a command input device for inputting a pressure relief command or a normal working command to the microprocessor;

[0019] When the pressure relief command is input, the microprocessor controls the shutter to be in a closed state to achieve pressure relief of the energy storage capacitor;

[0020] When a normal working instruction is input, the microprocessor drives the energy storage capacitor to supply energy to the light output unit and controls the light gate to be in an open state.

[0021] In one embodiment, the light shutter includes a metal light blocking plate, and an energized coil located near the metal light blocking plate and used to attract the displacement of the metal light blocking plate to achieve switching of the light shutter to an open or closed state.

[0022] In one embodiment, a displacement sensor is provided near the metal light blocking sheet for detecting the displacement of the metal light blocking sheet to determine whether the opening and closing state of the light shutter is switched to the right position.

[0023] In one embodiment, the light emitting unit includes a laser reflecting component and a laser generating component located inside the laser reflecting component.

[0024] In one embodiment,

[0025] The laser reflection component comprises a half-reflection mirror and a full-reflection mirror arranged at intervals, and the half-reflection mirror is close to the light-emitting side of the light-emitting unit;

[0026] The laser generating assembly comprises a laser rod disposed between the semi-reflecting mirror and the total reflecting mirror, and a xenon lamp located near the laser rod.

[0027] In one embodiment, the energy supply unit comprises:

[0028] A pre-ignition circuit, which is used to accept the control of the microprocessor to drive the light emitting unit to be in a discharge state in advance;

[0029] A capacitor voltage detection circuit, which is used to detect the voltage of the energy storage capacitor under the control of the microprocessor;

[0030] A charging circuit, which is used to charge the energy storage capacitor under the control of the microprocessor;

[0031] The light output control circuit is arranged between the energy storage capacitor and the light output unit. The light output control circuit is used to accept the control of the microprocessor and further control the energy supply mode of the energy storage capacitor to the light output unit.

[0032] In one embodiment, the laser is a holmium laser in a holmium laser stone treatment device.

[0033] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0034] (1) By setting an optical gate between the front end of the light-emitting side of the light-emitting unit and the reflected light path, or only setting an optical gate at the front end of the light-emitting side of the light-emitting unit, when it is necessary to discharge the pressure of the energy storage capacitor, based on the optical gate between the reflected light path on the light-emitting side, when controlling the light emission of the xenon lamp in the light-emitting unit, the reflected light path is blocked so that the laser cannot generate laser, and at the same time, the voltage on the energy storage capacitor in the laser is discharged; or, based on the optical gate at the front end of the light-emitting side, when controlling the light emission of the xenon lamp in the light-emitting unit so that the laser generates low-power non-pulsed laser, the low-power non-pulsed laser is safely blocked, and at the same time, the voltage on the energy storage capacitor in the laser is discharged, which greatly simplifies the peripheral equipment related to the voltage discharge of the energy storage capacitor, avoids the use of a discharge circuit with higher technical processes for voltage discharge, improves product life, reduces cost and failure rate, and ensures the stability of the quality of the holmium laser stone treatment device; by utilizing the low power characteristic of the laser when emitting non-pulsed laser,

[0035] (2) Under the action of the light gate, the energy storage capacitor directly supplies energy to the xenon lamp to achieve voltage discharge. Compared with the existing method of using a voltage relief circuit to discharge the voltage of the energy storage capacitor, the voltage discharge time of the energy storage capacitor can be greatly reduced. In practical applications, for the use of holmium laser stone treatment devices, shortening the voltage discharge time can shorten the patient's treatment time, thereby reducing the patient's treatment risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 The schematic diagram of using a discharge circuit to discharge the voltage on the energy storage capacitor;

[0038] Figure 2 This is a peak power diagram of pulsed laser emitted by a holmium laser;

[0039] Figure 3 This is a schematic diagram of the structure of a laser that can achieve safe voltage discharge in the first setting mode of the present application;

[0040] Figure 4 This is a flow chart of the voltage discharge of the energy storage capacitor in the holmium laser stone treatment device under the first setting mode;

[0041] Figure 5 This is a schematic diagram of the structure of a laser that can achieve safe voltage discharge in the second setting mode of the present application;

[0042] Figure 6This is a peak power diagram of non-pulsed laser light emitted by a holmium laser;

[0043] Figure 7 This is a flow chart of the voltage discharge of the energy storage capacitor in the holmium laser stone treatment device under the second setting mode. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The present application provides a laser capable of achieving safe voltage discharge, comprising a light emitting unit, a power supply unit and a control unit.

[0046] A light gate is provided on the light emitting side of the light emitting unit; the energy supply unit includes an energy storage capacitor for supplying energy to the light emitting unit; the control unit includes a microprocessor for controlling the opening and closing state of the light gate; the microprocessor drives the energy storage capacitor to supply energy to the light emitting unit, controls the light gate to be in a closed state to block the reflected light path in the light emitting unit, thereby preventing the formation of laser, and realizing pressure relief of the energy storage capacitor; or, the microprocessor drives the energy storage capacitor to supply energy to the light emitting unit, the microprocessor drives the light emitting unit to generate non-pulsed laser, controls the light gate to be in a closed state to block the non-pulsed laser, and realizes pressure relief of the energy storage capacitor.

[0047] The laser capable of achieving safe voltage discharge of the present application is described in detail below in conjunction with corresponding embodiments.

[0048] Embodiment 1

[0049] A shutter is set between the front end of the light-emitting side of the light-emitting unit and the reflecting light path of the light-emitting unit (for the convenience of subsequent description, this shutter setting method is defined as the first setting method), that is, Figure 3 As shown, it includes a first optical gate located at the front end of the light emitting side of the light emitting unit, and a second optical gate located between the reflected light paths of the light emitting unit, and the second optical gate is close to the light emitting side of the light emitting unit, and the first optical gate is located outside the light emitting unit. When the microprocessor drives the energy storage capacitor to supply energy to the light emitting unit, the second optical gate is controlled to be in a closed state to block the reflected light path and prevent the light emitting unit from generating laser, thereby achieving pressure relief of the energy storage capacitor.

[0050] Furthermore, the light output unit includes a laser reflection component and a laser generating component located in the laser reflection component. The laser reflection component includes a half-reflection mirror and a full-reflection mirror arranged at intervals, and the half-reflection mirror is close to the light output side of the laser light output unit; the laser generating component includes a laser rod arranged between the half-reflection mirror and the full-reflection mirror, and a xenon lamp located near the laser rod. The second optical shutter is located between the half-reflection mirror and the laser rod.

[0051] The semi-reflective mirror is used to transmit part of the laser and reflect part of the laser, the fully reflective mirror is used to reflect all of the laser, the xenon lamp is used as the laser light source, and the laser rod is used to be excited by the continuous light emitted by the xenon lamp to produce non-pulsed laser or excited by discontinuous light to produce pulsed laser. Specifically, when the xenon lamp irradiates the laser rod, the atoms or ions in the laser rod are excited to be in an excited state. Under the oscillation and reflection of the semi-reflective mirror and the fully reflective mirror, if there is an incident photon interacting with it, the energy level of the atoms or ions jumps to a higher energy level, thereby emitting the corresponding laser.

[0052] The principle of using the second optical gate to achieve safe pressure relief of the energy storage capacitor is specifically described below.

[0053] As can be seen from the above description, the atoms or ions in the excited state need to oscillate repeatedly between the half-reflecting mirror and the total reflecting mirror in order to generate laser. Under the action of the second optical gate, when the second optical gate is in a closed state to block the reflected light path, the energy storage capacitor supplies energy to the xenon lamp, and the xenon lamp illuminates the laser rod to excite the atoms or ions in the laser rod to be in an excited state. The atoms or ions in the excited state cannot oscillate repeatedly between the half-reflecting mirror and the total reflecting mirror, so laser cannot be formed. The light output unit only generates ordinary light, just like the light emitted by a daily incandescent lamp or a camera flash. Therefore, the laser at this time will not pose any danger to the outside world, but the xenon lamp consumes the electrical energy of the energy storage capacitor, thereby achieving the purpose of depressurizing the energy storage capacitor.

[0054] The first optical shutter is used as a safety protection device. Through opening and closing control, it prevents the laser from causing damage to external objects due to laser generation after the laser is operated accidentally when not in use.

[0055] Furthermore, the control unit also includes a command input device for inputting a pressure relief command or a normal working command to the microprocessor; when the pressure relief command is input, the microprocessor controls the light gate to be in a closed state to achieve pressure relief of the energy storage capacitor; when the normal working command is input, the microprocessor drives the energy storage capacitor to supply energy to the light output unit and controls the light gate to be in an open state.

[0056] The further instruction input device includes a touch screen for inputting instructions and a display for displaying the working status of the laser. In actual application, the relevant operator inputs a pressure relief instruction or a normal working instruction to the microprocessor through the instruction input device, so that the microprocessor executes the energy storage capacitor voltage relief control program or the laser normal working control program stored in the microprocessor.

[0057] For example, when the optical shutter is set in the first mode, the relevant operator inputs a pressure relief instruction to the microprocessor through the instruction input device. At this time, the microprocessor executes the energy storage capacitor voltage discharge control program, controls the energy storage capacitor to supply energy to the xenon lamp, and controls the second optical shutter to be in a closed state; the relevant operator inputs a normal working instruction to the microprocessor through the instruction input device. At this time, the microprocessor executes the normal working control program of the laser, controls the energy storage capacitor to supply energy to the xenon lamp, and controls the first optical shutter and the second optical shutter to be in an open state.

[0058] Furthermore, the light shutter in this embodiment includes a metal light blocking sheet, and a power-on coil located near the metal light blocking sheet for attracting the displacement of the metal light blocking sheet to achieve the switching of the light shutter opening and closing state. When the power-on coil is energized, it will generate magnetism, and because the power-on coil is located near the metal light blocking sheet, and the metal light blocking sheet is made of metal, the power-on coil will attract the metal light blocking sheet under the action of magnetism, thereby achieving the displacement of the metal light blocking sheet.

[0059] In actual application, when the energized coil attracts the metal light block so that the metal light block moves to between the semi-reflecting mirror and the laser rod, the metal light block is defined as being in a closed state at this time, and the metal light block can block the non-pulsed laser generated by the laser rod; when the energized coil attracts the metal light block so that the metal light block moves away from the semi-reflecting mirror and the laser rod, the metal light block is defined as being in an open state at this time, and the metal light block does not affect the operation of the laser rod.

[0060] Furthermore, a displacement sensor is provided near the metal light blocking sheet for detecting the displacement of the metal light blocking sheet to determine whether the opening and closing state of the light gate is switched to the right position. In practical applications, the displacement of the metal light blocking sheet can be limited by the corresponding limiter, thereby limiting the maximum displacement of the metal light blocking sheet upward or downward, and defining that when the metal light blocking sheet is displaced upward to the highest position, the metal light blocking sheet is in a closed state, and at this time the metal light blocking sheet is located between the semi-reflecting mirror and the laser rod, and when the metal light blocking sheet is displaced downward to the lowest position, the metal light blocking sheet is in an open state, and at this time the metal light blocking sheet does not block the light path between the semi-reflecting mirror and the laser rod, and records the distance between the highest position and the lowest position. Based on the above definition, it is possible to determine whether the open state is switched to the closed state: the metal light blocking sheet is initially located at the lowest position (open state), and when the energized coil attracts the metal light blocking sheet so that the metal light blocking sheet is displaced upward, the displacement of the metal light blocking sheet is detected by the displacement sensor, thereby determining whether the metal light blocking sheet reaches between the semi-reflecting mirror and the laser rod, that is, whether the light gate is switched to the closed state. The judgment of whether the closed state is switched to the open state is similar to the above, and will not be repeated here.

[0061] Furthermore, the energy supply unit includes a pre-ignition circuit, a capacitor voltage detection circuit, a charging circuit and a light output control circuit. The pre-ignition circuit is used to accept the control of the microprocessor to drive the light output unit to be in a discharge state in advance; the capacitor voltage detection circuit is used to accept the control of the microprocessor to detect the voltage of the energy storage capacitor; the charging circuit is used to accept the control of the microprocessor to charge the energy storage capacitor. The pre-ignition circuit, the capacitor voltage detection circuit, the charging circuit and the energy storage capacitor are arranged in parallel.

[0062] Specifically, the energy storage capacitor is used to power the xenon lamp, that is, to store electrical energy to provide the high energy required by the light emitting unit, and to provide electrical energy to the light emitting unit. The capacitor voltage detection circuit is used to accept the control of the microprocessor, detect the voltage of the energy storage capacitor in real time and compare the detection value with the set value to determine whether the energy storage capacitor needs to be discharged, or to determine whether the current voltage of the energy storage capacitor meets the energy supply requirements for the xenon lamp. The charging circuit is used to accept the control of the microprocessor, charge the energy storage capacitor and control the charging voltage.

[0063] The pre-ignition circuit is used to put the laser rod of the light emitting unit into a discharge state in advance. Through the pre-ignition operation of the pre-ignition circuit, the light emitting unit can be put into a discharge state in advance, reducing the voltage fluctuation at startup, thereby improving the startup reliability and stability of the laser. After the light emitting unit is started, the normal output power of the laser can be reached more easily, thereby improving the output power of the laser.

[0064] The light output control circuit is arranged between the energy storage capacitor and the light output unit. The light output control circuit is used to accept the control of the microprocessor, and then control the energy storage capacitor to supply energy to the light output unit to generate non-pulsed laser or pulsed laser. In practical applications, the different functions of the energy storage capacitor to the xenon lamp can make the laser rod produce different types of lasers. Under the control of the light output control circuit, the energy storage capacitor supplies energy to the xenon lamp in a non-pulsed form, which can make the laser rod produce non-pulsed laser, or the energy storage capacitor supplies energy to the xenon lamp in a pulsed form, which can make the laser rod produce pulsed laser.

[0065] Furthermore, the control unit also includes an interface electrically connected to the microprocessor, and the interface is electrically connected to the light gate, pre-ignition circuit, capacitor voltage detection circuit, charging circuit, and light output control circuit. Through the interface, the microprocessor implements the issuance of control instructions to the light gate, pre-ignition circuit, capacitor voltage detection circuit, charging circuit, and light output control circuit, and the acceptance of status feedback.

[0066] It should be noted that the laser described in this embodiment is a holmium laser in a holmium laser stone treatment device. Of course, for other lasers with similar structures to the laser described in this embodiment, the shutter setting method described in this embodiment can also be used to achieve safe pressure relief of the energy storage capacitor.

[0067] The following is a detailed explanation of the pressure relief of the laser energy storage capacitor using the holmium laser stone treatment device as an example.

[0068] When the holmium laser stone therapy device is in use, the operator sets the average power of the external laser of the holmium laser stone therapy device according to the size of the stone to be treated. The charging voltage of the energy storage capacitor in the holmium laser stone therapy device corresponds to the external laser power of the holmium laser. When the operator issues a normal working instruction through the instruction input device, the microprocessor controls the charging circuit through the interface to charge the energy storage capacitor to a voltage corresponding to the target power laser. When the energy storage capacitor has been charged to a voltage corresponding to the target power laser, if it is necessary to end the treatment or reduce the laser power (i.e., reduce the energy storage capacitor voltage) at this time, the energy storage capacitor voltage needs to be discharged to the set voltage. The operator inputs the pressure relief command through the command input device, and the microprocessor controls the closing of the second light gate through the interface. The microprocessor controls the xenon lamp in the holmium laser to emit light according to the execution flow of the energy storage capacitor voltage discharge control program. The xenon lamp illuminates the laser rod to excite the atoms or ions in the laser rod to be in an excited state. Under the shielding effect of the second light gate, the excited atoms or ions cannot oscillate repeatedly between the semi-reflecting mirror and the fully reflecting mirror, so no laser can be formed. Therefore, the laser will not pose any danger to the outside world, but the xenon lamp consumes the electrical energy of the energy storage capacitor, thereby achieving the purpose of pressure relief of the energy storage capacitor.

[0069] The following combination Figure 4, the voltage discharge process of the energy storage capacitor in the holmium laser stone treatment device is explained in detail.

[0070] A1: Start the pre-ignition circuit to pre-ignite the light-emitting unit, and then go to A2;

[0071] A2: Turn off the charging circuit and go to A3;

[0072] A3: Adjust the state of the second shutter to the light shielding position, that is, switch the second shutter to the closed state, and go to A4;

[0073] A4: Determine whether the second optical shutter is in the light shielding position, that is, determine whether the second optical shutter is in a closed state. If not, go to A3; if so, go to A5;

[0074] A5: The microprocessor issues a laser power adjustment instruction, determines the target voltage to be adjusted, and goes to A6;

[0075] A6: Start the A / D conversion (analog signal to digital signal) in the interface, detect the energy storage capacitor voltage through the capacitor voltage detection circuit and compare it with the target voltage, and go to A7;

[0076] A7: Determine whether the voltage on the energy storage capacitor needs to be discharged. If yes, go to A8. If no, go to A12.

[0077] A8: Open the light control circuit and go to A9;

[0078] A9: Controls the xenon lamp in the holmium laser to emit light, and at the same time discharges the voltage on the energy storage capacitor, and then transfers to A10;

[0079] A10: Start the A / D conversion in the interface and detect the voltage of the energy storage capacitor;

[0080] A11: Determine whether the voltage of the energy storage capacitor has been discharged. If not, go to A19. If yes, go to A12.

[0081] A12: End the voltage discharge of the energy storage capacitor and go to A13;

[0082] A13: The second optical shutter returns to its original position, that is, the second optical shutter is switched to the open state, and the process ends.

[0083] Embodiment 2

[0084] A shutter is set at the front end of the light-emitting unit on the light-emitting side (for the convenience of subsequent description, this shutter setting method is defined as the second setting method), that is, Figure 5 As shown, a third optical shutter is arranged at the front end of the light emitting side of the light emitting unit, and the third optical shutter is located outside the light emitting unit.

[0085] The microprocessor drives the energy storage capacitor to supply energy to the light output unit. When the light output unit generates non-pulsed laser, the third optical shutter is controlled to be in a closed state to shield the non-pulsed laser, thereby achieving pressure relief of the energy storage capacitor. That is, the light output type of the light output unit and the opening and closing state of the optical shutter are controlled by the microprocessor. When the energy storage capacitor needs to be relieved, under the control of the microprocessor, the energy storage capacitor is controlled to supply energy to the light output unit and generate non-pulsed laser, thereby consuming the electrical energy in the energy storage capacitor. At the same time, the optical shutter is controlled to be in a closed state to achieve safe shielding of low-power non-pulsed laser, thereby achieving the purpose of safe pressure relief of the energy storage capacitor.

[0086] Furthermore, the light emitting unit includes a laser reflection component and a laser generating component located in the laser reflection component. The laser reflection component includes a half-reflection mirror and a full-reflection mirror arranged at intervals, and the half-reflection mirror is close to the light emitting side of the laser light emitting unit; the laser generating component includes a laser rod arranged between the half-reflection mirror and the full-reflection mirror, and a xenon lamp located near the laser rod.

[0087] The semi-reflective mirror is used to transmit part of the laser and reflect part of the laser, the fully reflective mirror is used to reflect all of the laser, the xenon lamp is used as the laser light source, and the laser rod is used to be excited by the continuous light emitted by the xenon lamp to produce non-pulsed laser or excited by discontinuous light to produce pulsed laser. Specifically, when the xenon lamp irradiates the laser rod, the atoms or ions in the laser rod are excited to be in an excited state. Under the oscillation and reflection of the semi-reflective mirror and the fully reflective mirror, if there is an incident photon interacting with it, the energy level of the atoms or ions jumps to a higher energy level, thereby emitting the corresponding laser.

[0088] The principle of using the third optical gate to achieve safe pressure relief of the energy storage capacitor is specifically described below.

[0089] For the laser, when it generates pulsed laser, the microprocessor controls the energy storage capacitor to supply energy to the xenon lamp in pulse form. At the same time, the microprocessor controls the third optical gate to be in the open state, and the voltage on the energy storage capacitor is loaded on the xenon lamp. The xenon lamp emits discontinuous light to illuminate the laser rod of the solid material, exciting the atoms or ions in the laser rod to be in an excited state. Under the reflection effect of the semi-reflective lens and the fully reflective lens, if there is an incident photon interacting with it, the energy level of the atoms or ions jumps to a higher energy level, thereby emitting a higher-power pulsed laser, see Figure 2 As shown, this is a peak power diagram of the pulsed laser emitted by the holmium laser during normal operation. The peak power can reach 1000W. At this time, the third optical gate cannot safely block such a high-power laser.

[0090] When the microprocessor controls the energy storage capacitor to supply energy to the xenon lamp in a non-pulsed form, the microprocessor controls the third shutter to be in a closed state, and the voltage on the energy storage capacitor is loaded on the xenon lamp. The xenon lamp emits continuous light to irradiate the laser rod of the solid material, thereby generating a non-pulsed laser, and the generated non-pulsed laser irradiates the third shutter. Since the power of the non-pulsed laser is relatively small, the third shutter can safely block the non-pulsed laser. While the third shutter blocks the non-pulsed laser, the voltage of the energy storage capacitor is safely discharged to the target voltage, thereby achieving the purpose of safe pressure relief. Figure 6 As shown in the figure, it is the peak power diagram of the non-pulsed laser emitted by the holmium laser. Figure 6 It can be seen that the peak power of the non-pulsed laser is below 5 W, so the third optical gate can safely block the non-pulsed laser.

[0091] Correspondingly, the third optical shutter can also be used as a safety protection device, which can prevent the laser from causing damage to external objects due to accidental operation of the laser when it is not in use through opening and closing control.

[0092] Furthermore, the control unit also includes a command input device for inputting a pressure relief command or a normal working command to the microprocessor; when the pressure relief command is input, the microprocessor controls the shutter to be in a closed state to achieve pressure relief of the energy storage capacitor; when the normal working command is input, the microprocessor drives the energy storage capacitor to supply energy to the light output unit and controls the shutter to be in an open state. The command input device is electrically connected to the microprocessor.

[0093] The further instruction input device includes a touch screen for inputting instructions and a display for displaying the working status of the laser. In actual application, the relevant operator inputs a pressure relief instruction or a normal working instruction to the microprocessor through the instruction input device, so that the microprocessor executes the energy storage capacitor voltage relief control program or the laser normal working control program stored in the microprocessor.

[0094] For example, when the light gate is set in the second mode, the relevant operator inputs a pressure relief command to the microprocessor through the command input device. At this time, the microprocessor executes the energy storage capacitor voltage discharge control program, controls the energy storage capacitor to supply energy to the xenon lamp, and controls the third light gate to be in a closed state; the relevant operator inputs a normal working command to the microprocessor through the command input device. At this time, the microprocessor executes the normal working control program of the laser, controls the energy storage capacitor to supply energy to the xenon lamp, and controls the third light gate to be in an open state.

[0095] Furthermore, the light shutter in this embodiment includes a metal light blocking sheet, and a power-on coil located near the metal light blocking sheet for attracting the displacement of the metal light blocking sheet to achieve the switching of the light shutter opening and closing state. When the power-on coil is energized, it will generate magnetism, and because the power-on coil is located near the metal light blocking sheet, and the metal light blocking sheet is made of metal, the power-on coil will attract the metal light blocking sheet under the action of magnetism, thereby achieving the displacement of the metal light blocking sheet.

[0096] In actual application, when the energized coil attracts the metal light block so that the metal light block moves to between the semi-reflecting mirror and the laser rod, the metal light block is defined as being in a closed state at this time, and the metal light block can block the non-pulsed laser generated by the laser rod; when the energized coil attracts the metal light block so that the metal light block moves away from the semi-reflecting mirror and the laser rod, the metal light block is defined as being in an open state at this time, and the metal light block does not affect the operation of the laser rod.

[0097] Furthermore, a displacement sensor is provided near the metal light blocking sheet for detecting the displacement of the metal light blocking sheet to determine whether the opening and closing state of the light gate is switched to the right position. In practical applications, the displacement of the metal light blocking sheet can be limited by the corresponding limiter, thereby limiting the maximum displacement of the metal light blocking sheet upward or downward, and defining that when the metal light blocking sheet is displaced upward to the highest position, the metal light blocking sheet is in a closed state, and at this time the metal light blocking sheet is located between the semi-reflecting mirror and the laser rod, and when the metal light blocking sheet is displaced downward to the lowest position, the metal light blocking sheet is in an open state, and at this time the metal light blocking sheet does not block the light path between the semi-reflecting mirror and the laser rod, and records the distance between the highest position and the lowest position. Based on the above definition, it is possible to determine whether the open state is switched to the closed state: the metal light blocking sheet is initially located at the lowest position (open state), and when the energized coil attracts the metal light blocking sheet so that the metal light blocking sheet is displaced upward, the displacement of the metal light blocking sheet is detected by the displacement sensor, thereby determining whether the metal light blocking sheet reaches between the semi-reflecting mirror and the laser rod, that is, whether the light gate is switched to the closed state. The judgment of whether the closed state is switched to the open state is similar to the above, and will not be repeated here.

[0098] Furthermore, the energy supply unit includes a pre-ignition circuit, a capacitor voltage detection circuit, a charging circuit and a light output control circuit. The pre-ignition circuit is used to accept the control of the microprocessor to drive the light output unit to be in a discharge state in advance; the capacitor voltage detection circuit is used to accept the control of the microprocessor to detect the voltage of the energy storage capacitor; the charging circuit is used to accept the control of the microprocessor to charge the energy storage capacitor. The pre-ignition circuit, the capacitor voltage detection circuit, the charging circuit and the energy storage capacitor are arranged in parallel.

[0099] Specifically, the energy storage capacitor is used to power the xenon lamp, that is, to store electrical energy to provide the high energy required by the light emitting unit, and to provide electrical energy to the light emitting unit. The capacitor voltage detection circuit is used to accept the control of the microprocessor, detect the voltage of the energy storage capacitor in real time and compare the detection value with the set value to determine whether the energy storage capacitor needs to be discharged, or to determine whether the current voltage of the energy storage capacitor meets the energy supply requirements for the xenon lamp. The charging circuit is used to accept the control of the microprocessor, charge the energy storage capacitor and control the charging voltage.

[0100] The pre-ignition circuit is used to put the laser rod of the light emitting unit into a discharge state in advance. Through the pre-ignition operation of the pre-ignition circuit, the light emitting unit can be put into a discharge state in advance, reducing the voltage fluctuation at startup, thereby improving the startup reliability and stability of the laser. After the light emitting unit is started, the normal output power of the laser can be reached more easily, thereby improving the output power of the laser.

[0101] The light output control circuit is arranged between the energy storage capacitor and the light output unit. The light output control circuit is used to accept the control of the microprocessor, and then control the energy storage capacitor to supply energy to the light output unit to generate non-pulsed laser or pulsed laser. In practical applications, the different functions of the energy storage capacitor to the xenon lamp can make the laser rod produce different types of lasers. Under the control of the light output control circuit, the energy storage capacitor supplies energy to the xenon lamp in a non-pulsed form, which can make the laser rod produce non-pulsed laser, or the energy storage capacitor supplies energy to the xenon lamp in a pulsed form, which can make the laser rod produce pulsed laser.

[0102] Furthermore, the control unit also includes an interface electrically connected to the microprocessor, and the interface is electrically connected to the light gate, pre-ignition circuit, capacitor voltage detection circuit, charging circuit, and light output control circuit. Through the interface, the microprocessor implements the issuance of control instructions to the light gate, pre-ignition circuit, capacitor voltage detection circuit, charging circuit, and light output control circuit, and the acceptance of status feedback.

[0103] It should be noted that the laser described in this embodiment is a holmium laser in a holmium laser stone treatment device. Of course, for other lasers with similar structures to the laser described in this embodiment, the shutter setting method of this embodiment can also be used to achieve safe pressure relief of the energy storage capacitor.

[0104] The following is a detailed explanation of the pressure relief of the laser energy storage capacitor using the holmium laser stone treatment device as an example.

[0105] When the holmium laser stone therapy device is in use, the operator sets the average power of the external laser of the holmium laser stone therapy device according to the size of the stone to be treated. The charging voltage of the energy storage capacitor in the holmium laser stone therapy device corresponds to the external laser power of the holmium laser. When the operator issues a normal working instruction through the instruction input device, the microprocessor controls the charging circuit through the interface to charge the energy storage capacitor to a voltage corresponding to the target power laser. When the energy storage capacitor has been charged to a voltage corresponding to the target power laser, if it is necessary to end the treatment or reduce the laser power (i.e., reduce the energy storage capacitor voltage) at this time, the energy storage capacitor voltage must be discharged to the set voltage. The operator inputs the pressure relief command through the command input device, and the microprocessor controls the third optical gate through the interface to move to the position of blocking the holmium laser optical path. The microprocessor controls the xenon lamp in the holmium laser to emit light according to the execution process of the energy storage capacitor voltage discharge control program, and controls the light output control circuit to make the holmium laser generate low-power non-pulsed laser. Since the power of non-pulsed laser is relatively small, the third optical gate can safely block the non-pulsed laser. While the third optical gate blocks the non-pulsed laser, the voltage of the energy storage capacitor is safely discharged to the set voltage, thereby achieving the purpose of safe pressure relief.

[0106] The following combination Figure 7 , the voltage discharge process of the energy storage capacitor in the holmium laser stone treatment device is explained in detail.

[0107] B1: Start the pre-ignition circuit to pre-ignite the light-emitting unit, and then go to B2;

[0108] B2: Turn off the charging circuit and go to B3;

[0109] B3: adjust the state of the third shutter to the light shielding position, that is, switch the third shutter to the closed state, and go to B4;

[0110] B4: Determine whether the third optical shutter is in the light shielding position, that is, determine whether the third optical shutter is in a closed state. If not, go to B3; if so, go to B5;

[0111] B5: The microprocessor issues a laser power adjustment instruction, determines the target voltage to be adjusted, and goes to B6;

[0112] B6: Start the A / D conversion (analog signal to digital signal) in the interface, detect the energy storage capacitor voltage through the capacitor voltage detection circuit and compare it with the target voltage, and go to B7;

[0113] B7: Determine whether the voltage on the energy storage capacitor needs to be discharged. If yes, go to B8; if no, go to B12;

[0114] B8: Open the light control circuit and go to B9;

[0115] B9: Control the xenon lamp in the holmium laser to emit continuous light, generate non-pulsed laser, and discharge the voltage on the energy storage capacitor at the same time, and go to B10;

[0116] B10: Start the A / D conversion in the interface and detect the voltage of the energy storage capacitor;

[0117] B11: Determine whether the voltage of the energy storage capacitor has been discharged. If not, go to B9. If yes, go to B12.

[0118] B12: End the voltage discharge of the energy storage capacitor and go to B13;

[0119] B13: The third optical shutter returns to its original position, that is, the third optical shutter is switched to the open state, and the process ends.

[0120] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0121] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0122] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A laser capable of achieving safe voltage discharge, characterized in that: include: A light emitting unit, wherein a light shutter is provided on the light emitting side thereof; An energy supply unit, comprising an energy storage capacitor for supplying energy to the light emitting unit; A control unit, comprising a microprocessor for controlling the opening and closing state of the optical shutter; The microprocessor drives the energy storage capacitor to supply energy to the light output unit, controls the optical shutter to be in a closed state to block the reflected light path in the light output unit, thereby preventing the formation of laser and achieving pressure relief of the energy storage capacitor; or The microprocessor drives the energy storage capacitor to supply energy to the light output unit, and the microprocessor drives the light output unit to generate non-pulsed laser, controls the optical shutter to be in a closed state to block the non-pulsed laser, and realizes pressure relief of the energy storage capacitor.

2. A laser capable of achieving safe voltage discharge as claimed in claim 1, characterized in that: The optical gate is a second optical gate located between the reflection optical paths of the light emitting unit, and the second optical gate is close to the light emitting side of the light emitting unit; When the microprocessor drives the energy storage capacitor to supply energy to the light output unit, the second optical shutter is controlled to be in a closed state to block the reflected light path and prevent the light output unit from generating laser, thereby achieving pressure relief of the energy storage capacitor.

3. A laser capable of achieving safe voltage discharge as claimed in claim 1, characterized in that: The optical shutter is a third optical shutter located at the front end of the light emitting side of the light emitting unit; The microprocessor drives the energy storage capacitor to supply energy to the light output unit. When the light output unit generates non-pulsed laser, the third optical gate is controlled to be in a closed state to shield the non-pulsed laser, thereby achieving pressure relief of the energy storage capacitor.

4. A laser capable of achieving safe voltage discharge as claimed in claim 1, characterized in that: The control unit also includes a command input device for inputting a pressure relief command or a normal working command to the microprocessor; When a pressure relief instruction is input, the microprocessor controls the optical shutter to be in a closed state to achieve pressure relief of the energy storage capacitor; When a normal working instruction is input, the microprocessor drives the energy storage capacitor to supply energy to the light output unit and controls the light gate to be in an open state.

5. A laser capable of achieving safe voltage discharge as claimed in claim 1, characterized in that: The light shutter comprises a metal light blocking sheet and an energized coil located near the metal light blocking sheet and used for attracting the displacement of the metal light blocking sheet to realize the switching of the light shutter opening and closing states.

6. A laser capable of achieving safe voltage discharge as claimed in claim 5, characterized in that: A displacement sensor is provided near the metal light blocking sheet for detecting the displacement of the metal light blocking sheet to determine whether the opening and closing state of the light shutter is switched to the right position.

7. A laser capable of achieving safe voltage discharge as claimed in claim 1, characterized in that: The light emitting unit comprises a laser reflecting component and a laser generating component located inside the laser reflecting component.

8. A laser capable of achieving safe voltage discharge as claimed in claim 7, characterized in that: The laser reflection component comprises a half-reflection mirror and a full-reflection mirror arranged at intervals, and the half-reflection mirror is close to the light-emitting side of the light-emitting unit; The laser generating assembly comprises a laser rod disposed between the semi-reflecting mirror and the total reflecting mirror, and a xenon lamp located near the laser rod.

9. A laser capable of achieving safe voltage discharge as claimed in claim 1, characterized in that: The energy supply unit comprises: A pre-ignition circuit, which is used to accept the control of the microprocessor to drive the light emitting unit to be in a discharge state in advance; A capacitor voltage detection circuit, which is used to detect the voltage of the energy storage capacitor under the control of the microprocessor; A charging circuit, which is used to charge the energy storage capacitor under the control of the microprocessor; The light output control circuit is arranged between the energy storage capacitor and the light output unit. The light output control circuit is used to accept the control of the microprocessor and further control the energy supply mode of the energy storage capacitor to the light output unit.

10. A laser capable of achieving safe voltage discharge according to any one of claims 1 to 9, characterized in that: The laser is a holmium laser in a holmium laser stone treatment device.

Images