Laser tube shell and laser

Abstract

The utility model relates to the technical field of lasers, in particular to a laser tube shell and a laser, and the laser tube shell comprises a shell and a power interface; the power interface is arranged on the shell and is used for connecting the laser and an external input power supply; the power interface is provided with a power circuit. The power supply circuit comprises a ferrite magnetic bead, a first LC high-pass filter, a first LC low-pass filter, a second LC low-pass filter, a second LC high-pass filter and a transient voltage suppression diode which are connected in sequence; the input end of the power circuit is connected with an external input power supply, and the output end of the power circuit is connected with the power input end of the laser. The utility model has the effect of improving the stability of the input current of the laser.

Description

Technical Field

[0001] This application relates to the field of laser technology, and in particular to a laser housing and a laser. Background Technology

[0002] As a precision optoelectronic device, lasers pose several risks when connected to a power source, requiring a constant and precise current to maintain stable operation.

[0003] In existing technologies, lasers require an external power supply. A reserved interface is set in the laser tube housing, and the cable is directly connected to the internal circuitry of the laser tube housing through the reserved interface. However, in actual applications, current spikes or ripples will occur at the moment of power-on. These abnormal fluctuations in current will cause instability in the laser's operating current, thereby affecting the stability of the laser's output optical power. Utility Model Content

[0004] To improve the stability of the laser input current, this application provides a laser housing and a laser.

[0005] Firstly, this application provides a laser housing, which adopts the following technical solution:

[0006] A laser housing includes: a housing and a power interface;

[0007] The power interface is located on the housing and is used to connect the laser to an external power input.

[0008] The power interface is equipped with a power circuit;

[0009] The power supply circuit includes a ferrite bead L1, a first LC high-pass filter, a first LC low-pass filter, a second LC low-pass filter, a second LC high-pass filter, and a transient voltage suppression diode D1 connected in sequence.

[0010] The first LC high-pass filter includes a first capacitor C1 and a first inductor L2;

[0011] The first LC low-pass filter includes a first resistor R1, a second inductor L3, and a second capacitor C2;

[0012] The second LC low-pass filter includes a second resistor R2, a third inductor L4, and a third capacitor C3;

[0013] The second LC high-pass filter includes a first differential-mode capacitor C4 and a first differential-mode inductor L5;

[0014] The input terminal of the power supply circuit is connected to an external power supply, and the output terminal of the power supply circuit is connected to the power input terminal of the laser.

[0015] By adopting the above technical solution, a power circuit is set at the power interface. Ferrite beads suppress high-frequency noise on the power line, helping to reduce high-frequency interference introduced by the external input current, reducing current spikes and ripple interference in the external input current, and improving the stability of the external input current. A first LC high-pass filter filters out low-frequency interference in the external input current, and a first LC low-pass filter and a second LC low-pass filter filter out high-frequency noise in the external input power supply. Through the combination of multiple filters, different frequencies of noise are filtered in the external input current, improving the stability of the laser's external input current. In addition, a differential-mode filter is also set in the power circuit, which helps suppress differential-mode interference in the external input power line, further improving the stability of the external input current in the laser. Moreover, the above technical solution uses a segmented LC filter network to provide targeted suppression for different interference frequency ranges, which helps to filter the external input current in different frequency noise environments, reducing current spikes and ripple interference in the external input current, improving the stability of the external input current, and also improving the adaptability and reliability of the laser housing.

[0016] Optionally, the power supply circuit further includes a first optocoupler U1, a second optocoupler U2, and a third optocoupler U3;

[0017] The input terminal of the first optocoupler U1 is connected to the output terminal of the first LC high-pass filter, and the output terminal of the first optocoupler U1 is connected to the input terminal of the first LC low-pass filter.

[0018] The input terminal of the second optocoupler U2 is connected to the output terminal of the first LC low-pass filter, and the output terminal of the second optocoupler U2 is connected to the input terminal of the second LC low-pass filter.

[0019] The input terminal of the third optocoupler U3 is connected to the output terminal of the second LC low-pass filter, and the output terminal of the third optocoupler U3 is connected to the input terminal of the second LC high-pass filter.

[0020] By adopting the above technical solution, an optical coupler is introduced between different filters, which establishes physical isolation between each filter segment and the next filter, and provides electrical isolation. This helps to isolate abnormal fluctuations such as current spikes or ripples in the external input current of the circuit, reduces the mutual influence between different filters, significantly reduces spikes and ripples in the external input current, and improves the stability and anti-interference capability of the laser's external input current under different noise environments.

[0021] Optionally, the power supply circuit further includes a notch filter bank;

[0022] The notch filter bank includes at least one notch filter;

[0023] The input of the notch filter bank is connected to the output of the first LC high-pass filter, and the output of the notch filter bank is connected to the input of the first LC low-pass filter.

[0024] By adopting the above technical solution and setting up a notch filter bank, it is helpful to accurately filter out current spikes or ripples of specific frequencies in the external input current. Furthermore, when facing interference from different noise environments, the notch filter can supplement the shortcomings of other filters, enhancing the filtering effect within a specific frequency range and improving the laser's anti-interference capability under various noise conditions. Moreover, the notch filter bank, together with other filters, can form a multi-stage integrated filtering network, which helps reduce power supply noise and ripple levels in the external input current, improving the stability and reliability of the external input current in the power supply circuit, and thus improving the stability of the laser's output power.

[0025] Optionally, a first electromagnetic shielding cover a is provided on the outside of the power interface.

[0026] By adopting the above technical solution, an electromagnetic shielding cover is set to protect the power interface. The electromagnetic shielding cover blocks the interference of external electromagnetic fields on the power circuit, improves the stability of the external input current circuit, helps to reduce the generation of spikes and ripples in the external input current circuit, and improves the anti-interference capability of the laser and the stability of the external input current of the laser.

[0027] Optionally, the laser housing also includes a grounding interface, which is disposed on the housing and used to connect the laser to an external grounding system;

[0028] The grounding interface is equipped with a grounding circuit;

[0029] The grounding circuit includes: a third resistor R3, a fifth capacitor C6, and a third LC low-pass filter;

[0030] The third LC low-pass filter includes the fourth inductor L6 and the sixth capacitor C7;

[0031] The input terminal of the grounding circuit is connected to the grounded end of the power supply circuit, and the output terminal of the grounding circuit is connected to the external grounding system.

[0032] By employing the above technical solution, a multi-level filtered current return circuit is formed through the combined action of a grounding resistor, a grounding capacitor, and a third LC low-pass filter. During power-on or operation, current spikes or ripples generated are rapidly discharged to the external grounding system via the grounding circuit, thus preventing these spikes or ripples from affecting the laser's external input current and improving its stability. Simultaneously, the multi-level filtered current return circuit helps further filter out high-frequency noise and ripple in the power supply circuit, improving the purity and stability of the external input current and contributing to stable power supply output. Furthermore, the grounding circuit reduces current spikes and ripple in the power supply circuit, significantly reducing the impact of power supply fluctuations on the laser's output power, thereby improving the overall performance and stability of the laser.

[0033] Optionally, a second electromagnetic shielding cover b is provided on the outside of the grounding interface.

[0034] By adopting the above technical solution and setting an electromagnetic shielding cover to protect the grounding interface, it helps to further reduce the interference of external electromagnetic fields on the internal circuit of the laser. During power-on or operation, the electromagnetic shielding cover can reduce the influence of external electromagnetic fields on the power circuit, improve the overall reliability of the grounding system, and help to discharge abnormal current fluctuations inside the laser to the external grounding system when current spikes and ripples are generated, thereby maintaining the stability of the laser's operating current.

[0035] Secondly, the laser provided in this application adopts the following technical solution:

[0036] A laser comprising: the laser employing a laser housing as described in the first aspect above.

[0037] By adopting the above technical solution, the power supply circuit, grounding circuit, and electromagnetic shielding cover outside the power interface and grounding interface, based on the combination of multi-level filters, the laser is filtered and protected from different angles, which improves the stability of the laser's power supply and grounding, reduces the interference of current spikes and ripples in the external input current, and improves the stability and anti-interference ability of the laser's external input current under different noise environments.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. A power supply circuit is installed at the power interface. Ferrite beads suppress high-frequency noise on the power line, helping to reduce high-frequency interference introduced by the external input current. This reduces interference from current spikes and ripples in the external input current, improving its stability. A first LC high-pass filter filters out low-frequency interference from the external input current, while a first and second LC low-pass filter filter filters out high-frequency noise from the external input power supply. Through the combination of multiple filters, different frequencies of noise are filtered from the external input current, improving the stability of the laser's external input current. Furthermore, a differential-mode filter is also included in the power supply circuit to suppress differential-mode interference in the external input power line, further improving the stability of the external input current in the laser. Moreover, the above technical solution uses a segmented LC filter network to provide targeted suppression for different interference frequency ranges, helping to filter the external input current in different frequency noise environments, reducing current spikes and ripples in the external input current, improving its stability, and also enhancing the adaptability and reliability of the laser housing.

[0040] 2. Introducing optical couplers between different filters establishes physical isolation between each filter segment and the next, providing electrical isolation. This helps to isolate abnormal fluctuations such as current spikes or ripples in the external input current of the circuit, reduces mutual interference between different filters, significantly reduces spikes and ripples in the external input current, and improves the stability and anti-interference capability of the laser's external input current under different noise environments.

[0041] 3. Setting up a notch filter bank helps to accurately filter out current spikes or ripples of specific frequencies in the external input current. Furthermore, when facing interference from different noise environments, the notch filter can supplement the shortcomings of other filters, enhancing the filtering effect within a specific frequency range and improving the laser's anti-interference capability under varying noise conditions. Moreover, the notch filter bank, along with other filters, can form a multi-stage integrated filtering network, helping to reduce power supply noise and ripple levels in the external input current, improving the stability and reliability of the external input current in the power supply circuit, and consequently improving the stability of the laser's output power. Attached Figure Description

[0042] Figure 1 This is a circuit diagram of the power supply circuit of the laser housing in Embodiment 1 of this application;

[0043] Figure 2 This is a circuit diagram of the grounding circuit of the laser housing in Embodiment 1 of this application;

[0044] Figure 3 This is a schematic diagram of the laser housing structure in Embodiment 1 of this application;

[0045] Figure 4 This is a circuit diagram of the power supply circuit of the laser housing in Embodiment 2 of this application;

[0046] Figure 5 This is a circuit diagram of the power supply circuit of the laser housing in Embodiment 3 of this application.

[0047] Reference numerals: L1, Ferrite bead; L2, First inductor; L3, Second inductor; L4, Third inductor; L5, First differential mode inductor; L6, Fourth inductor; C1, First capacitor; C2, Second capacitor; C3, Third capacitor; C4, First differential mode capacitor; C5, Fourth capacitor; C6, Fifth capacitor; C7, Sixth capacitor; C8, Seventh capacitor; C9, Eighth capacitor; C10, Ninth capacitor; R1, First resistor; R2, Second resistor; R3, Third resistor; R4, Fourth resistor; R5, Fifth resistor; R6, Sixth resistor; R7, Seventh resistor; R8, Eighth resistor; D1, Transient voltage suppression diode; a, First electromagnetic shielding cover; b, Second electromagnetic shielding cover. Detailed Implementation

[0048] The following combination Figures 1 to 5 This application will be described in further detail.

[0049] Example 1: This example discloses a laser housing, such as... Figure 1 As shown, it includes a housing and a power interface. The power interface is located on the housing and is used to connect the laser to an external input power supply.

[0050] The power interface is equipped with a power circuit, which includes a ferrite bead L1, a first LC high-pass filter, a first LC low-pass filter, a second LC low-pass filter, a second LC high-pass filter, and a transient voltage suppression diode D1. The configuration and connection method of this embodiment are as follows:

[0051] The input terminal of the power supply circuit is connected to the external power supply of the laser. The input terminal of the power supply circuit is connected to one end of the ferrite bead L1. The other end of the ferrite bead L1 is connected to ground through the first capacitor C1 and the first inductor L2. The first capacitor C1 is connected to the output terminal of the power supply circuit through the second resistor R2. The output terminal of the power supply circuit is connected to the power input terminal of the laser. The first capacitor C1 is connected to ground through the first resistor R1, the second inductor L3 and the second capacitor C2. The first capacitor C1 is connected to ground through the fourth capacitor C5. The second resistor R2 is connected to ground through the third inductor L4 and the third capacitor C3. The second resistor R2 is connected to ground through the first differential mode inductor L5 and the first differential mode capacitor C4. The anode of the transient voltage suppression diode D1 is connected to the output terminal of the power supply circuit, and the cathode of the transient voltage suppression diode D1 is grounded.

[0052] The working principle of the power supply circuit in this embodiment is as follows: The external input power supply to the laser passes through the ferrite bead L1. Utilizing the hysteresis loss characteristics of the ferrite material, high-frequency electrical energy is converted into heat energy and dissipated, thus initially filtering high-frequency interference and removing high-frequency spike signals and ripples introduced from the external input power supply. Then, a first LC high-pass filter blocks low-frequency interference signals, removing low-frequency spike signals and ripples from the current. Next, a first LC low-pass filter removes high-frequency spike signals and ripples from the current. A second LC low-pass filter further removes high-frequency spike signals and ripples from the current. Finally, a second LC high-pass filter removes differential-mode interference signals from the circuit, outputting the filtered power signal. A transient voltage suppression diode D1 is included in the circuit. When a momentary overvoltage occurs at the output of the power supply circuit, the transient voltage suppression diode D1 quickly changes from a high-resistance state to a low-resistance state, dissipating the overvoltage energy to the grounding system. This clamps the voltage at the output of the power supply circuit within a safe range, thereby protecting the subsequently connected laser equipment from overvoltage damage and ensuring the safe and stable operation of the laser equipment.

[0053] In this embodiment, a power circuit is provided at the power interface on the housing. Ferrite beads suppress high-frequency noise on the power line, helping to reduce high-frequency interference introduced by the external input current, reducing interference from current spikes and ripples in the external input current, and improving the stability of the external input current. A first LC high-pass filter filters out low-frequency interference in the external input current, and a first LC low-pass filter and a second LC low-pass filter filter out high-frequency noise in the external input power supply. Through the combination of multiple filters, different frequencies of noise are filtered from the external input current, improving the stability of the laser's external input current. Furthermore, a differential-mode filter is also provided in the power circuit to help suppress differential-mode interference in the external input power line, further improving the stability of the external input current in the laser. Moreover, the above technical solution uses a segmented LC filter network to provide targeted suppression for different interference frequency ranges, which helps to filter the external input current in different frequency noise environments, reducing interference from current spikes and ripples in the external input current, improving the stability of the external input current, and also improving the adaptability and reliability of the laser housing.

[0054] In this embodiment, as Figure 2 As shown, the laser housing also includes a grounding interface, which is disposed on the housing and used for connection to an external grounding system. The grounding interface is equipped with a grounding circuit. The grounding circuit includes a third resistor R3, a fifth capacitor C6, and a third LC low-pass filter. The third LC low-pass filter includes a fourth inductor L6 and a sixth capacitor C7. The input terminal of the grounding circuit is connected to the grounded end of the power supply circuit, and the output terminal of the grounding circuit is connected to the external grounding system. The configuration and connection method of this embodiment are described below:

[0055] The input terminal of the grounding circuit is connected to one of the grounding terminals of the power supply circuit. The input terminal of the grounding circuit is connected to the grounding electrode through the third resistor R3 and the fourth inductor L6. The input terminal of the grounding circuit is connected to the external grounding system through the fifth capacitor C6. The sixth capacitor C7 is connected in parallel between the grounding electrode and the external grounding system.

[0056] The working principle of the grounding circuit in this embodiment is as follows:

[0057] When the power supply circuit generates a current that needs to be grounded, the current flows from one end of the power supply circuit to the input end of the grounding circuit. A portion of the high-frequency spike signal in the circuit flows rapidly into the external grounding system through the fifth capacitor C6, while another portion of the current flows to the grounding electrode through the third resistor R3 and the fourth inductor L6. During this process, the third resistor R3 limits the current magnitude and absorbs or dissipates some energy, thereby reducing the amplitude of ripple and spikes in the current. The fourth inductor L6 and the sixth capacitor C7 stabilize the potential throughout the grounding process and supplement and filter the high-frequency ripple and spike signals in the current, ultimately allowing the current to flow safely and stably into the external grounding system, achieving the purpose of grounding and ensuring the safe and stable operation of the power supply circuit.

[0058] In this embodiment, a multi-level filtered current return circuit is formed by the combined action of a grounding resistor, a grounding capacitor, and a third LC low-pass filter. During power-on or operation, current spikes or ripples generated are quickly discharged to the external grounding system through the grounding circuit, thereby preventing these spikes or ripples from affecting the external input current of the laser and improving the stability of the external input current. Simultaneously, the multi-level filtered current return circuit helps to further filter out high-frequency noise and ripple in the power supply circuit, improving the purity and stability of the external input current and helping to maintain stable power supply output. Furthermore, the grounding circuit reduces current spikes and ripple in the power supply circuit, significantly reducing the impact of power supply fluctuations on the laser's output optical power, thus improving the overall performance and stability of the laser.

[0059] like Figure 3 As shown, a first electromagnetic shielding cover a is provided on the outside of the power interface, and a second electromagnetic shielding cover b is provided on the outside of the grounding interface. The first electromagnetic shielding cover a and the second electromagnetic shielding cover b are rotatably mounted on the housing.

[0060] When in use, the first electromagnetic shielding cover a and the second electromagnetic shielding cover b are closed. When not in use, both the first electromagnetic shielding cover a and the second electromagnetic shielding cover b can be flipped up and opened to facilitate maintenance personnel to inspect the power interface and grounding interface.

[0061] Both the first electromagnetic shielding cover a and the second electromagnetic shielding cover b have notches at their lower ends to allow cables to connect to the power and grounding interfaces. This ensures that the cables can pass through the notches when the first and second electromagnetic shielding covers a and b are closed, avoiding the risk of cable damage due to compression or friction. It also reduces the direct exposed area of ​​the power and grounding interfaces, improving the laser housing's anti-interference capability. Furthermore, the notches at the lower ends of the first and second electromagnetic shielding covers a and b facilitate easy opening by maintenance personnel.

[0062] Even though the lower ends of the first electromagnetic shielding cover a and the second electromagnetic shielding cover b are notched, they can still be sealed when closed, preventing dust, moisture or other debris from entering the laser tube housing through the power interface and grounding interface, thereby protecting the internal circuits and components of the laser tube housing from damage.

[0063] The size and shape of the notches at the lower ends of the first electromagnetic shielding cover a and the second electromagnetic shielding cover b can be adjusted according to actual usage requirements to accommodate the output of cables of different diameters and types.

[0064] The first electromagnetic shielding cover a and the second electromagnetic shielding cover b are made of metal or other conductive materials. The first electromagnetic shielding cover a and the second electromagnetic shielding cover b can be made of highly conductive materials (such as copper, aluminum, etc.) or highly permeable materials (such as iron, nickel, etc.). When an electromagnetic interference signal touches the first electromagnetic shielding cover a and the second electromagnetic shielding cover b, it will be reflected from the surface of the first electromagnetic shielding cover a and the second electromagnetic shielding cover b, thereby reducing the electromagnetic interference signal entering the interior of the first electromagnetic shielding cover a and the second electromagnetic shielding cover b. Some of the unreflected electromagnetic interference signals will be absorbed by the first electromagnetic shielding cover a and the second electromagnetic shielding cover b and converted into other forms of energy, further reducing the interference signal entering the laser housing.

[0065] In this embodiment, the first electromagnetic shielding cover a and the second electromagnetic shielding cover b are provided to protect the power interface and the grounding interface, respectively. This helps to further reduce the interference of external electromagnetic fields on the internal circuit of the laser. During power-on or operation, the electromagnetic shielding cover can reduce the influence of external electromagnetic fields on the power circuit, improve the overall reliability of the grounding system, and help to discharge abnormal current fluctuations inside the laser to the external grounding system when current spikes and ripples are generated, thereby maintaining the stability of the laser's operating current.

[0066] Example 2: The difference from Example 1 is that:

[0067] like Figure 4 As shown, the power supply circuit further includes a first optocoupler U1, a second optocoupler U2, and a third optocoupler U3. The input terminal of the first optocoupler U1 is connected to the output terminal of the first LC high-pass filter, and the output terminal of the first optocoupler U1 is connected to the input terminal of the first LC low-pass filter. The input terminal of the second optocoupler U2 is connected to the output terminal of the first LC low-pass filter, and the output terminal of the second optocoupler U2 is connected to the input terminal of the second LC low-pass filter. The input terminal of the third optocoupler U3 is connected to the output terminal of the second LC low-pass filter, and the output terminal of the third optocoupler U3 is connected to the input terminal of the second LC high-pass filter. The configuration and connection method of this embodiment are described below:

[0068] The input terminal of the power supply circuit is connected to the external power supply of the laser. The input terminal of the power supply circuit is connected to the first terminal of the ferrite bead L1. The second terminal of the ferrite bead L1 is grounded through the first capacitor C1 and the first inductor L2. The first terminal of the first inductor L2 is connected to the first terminal of the first optocoupler U1. The first terminal of the first inductor L2 is grounded through the second terminal of the first optocoupler U1. The third terminal of the first optocoupler U1 is connected to the first terminal of the first resistor R1. The fourth terminal of the first optocoupler U1 is connected to the second terminal of the first resistor R1. The second terminal of the first resistor R1 is grounded through the second inductor L3 and the second capacitor C2. The first terminal of the first resistor R1 is connected to the first terminal of the fourth capacitor C5 and the first terminal of the second optocoupler U2. The second terminal of the second optocoupler C5 is connected to the second terminal of the second optocoupler U2 and grounded. The third terminal of the second optocoupler U2 is connected to the first terminal of the third inductor L4 through the second resistor R2. The fourth terminal of the second optocoupler U2 and the second terminal of the third inductor L4 are connected to the ground through the third capacitor C3. The first terminal of the third optocoupler U3 is connected to the first terminal of the third inductor L4. The second terminal of the third optocoupler U3 is grounded. The third terminal of the third optocoupler U3 and the first terminal of the first differential capacitor C4 are connected to the output terminal of the power supply circuit. The fourth terminal of the third optocoupler U3 and the second terminal of the first differential capacitor C4 are connected to the ground through the first differential inductor L5. The anode of the transient voltage suppression diode D1 is connected to the output terminal of the power supply circuit, and the cathode of the transient voltage suppression diode D1 is grounded.

[0069] The working principle of the power supply circuit in this embodiment is as follows: The external input power supply of the laser passes through the ferrite bead L1. Utilizing the hysteresis loss characteristics of the ferrite material, the high-frequency electrical energy is converted into heat energy and consumed, thus playing a preliminary role in filtering high-frequency interference. It filters out high-frequency spike signals and ripples introduced from the external input power supply. Then, it passes through the first LC high-pass filter to block low-frequency interference signals, filtering out low-frequency spike signals and ripples in the current. Electrical isolation is achieved through the first optocoupler U1, further isolating interference signals such as spikes or ripples from mutual conduction between the first LC high-pass filter and the first LC low-pass filter. Then, the first LC low-pass filter filters out high-frequency spike signals and ripples in the current. Electrical isolation is achieved again through the second optocoupler U2. Then, the second LC low-pass filter further filters out high-frequency spike signals and ripples in the current. Electrical isolation continues through the third optocoupler U3. Finally, the second LC high-pass filter filters out differential-mode interference signals in the circuit, outputting the filtered power signal. This achieves multi-stage filtering and signal isolation of the input power supply, providing a stable and interference-resistant power output for the laser.

[0070] In this embodiment, an optical coupler is introduced between different filters, establishing physical isolation between each filter segment and the next filter, providing electrical isolation. This helps to isolate abnormal fluctuations such as current spikes or ripples in the external input current of the circuit, reducing mutual interference between different filters, significantly reducing spikes and ripples in the external input current, and improving the stability and anti-interference capability of the laser's external input current under different noise environments.

[0071] Example 3: The difference from Example 1 is that:

[0072] The power supply circuit also includes a notch filter bank, which contains at least one notch filter. The input terminal of the notch filter bank is connected to the output terminal of the first LC high-pass filter, and the output terminal of the notch filter bank is connected to the input terminal of the first LC low-pass filter.

[0073] like Figure 5 As shown in this embodiment, only the power supply circuit of the notch filter bank with only one active double-T notch filter is shown. In actual use, multiple active double-T notch filters can be connected in series to form a notch filter bank as needed. Other types of notch filters can also be set to construct a notch filter bank as needed.

[0074] The structure and connection method of this embodiment are described below:

[0075] The input terminal of the power supply circuit is connected to the external power supply of the laser. The input terminal of the power supply circuit is also connected to one end of the ferrite bead L1. The other end of the ferrite bead L1 is grounded through the first capacitor C1 and the first inductor L2. The first capacitor C1 is connected to the first terminal of amplifier N1 in sequence through the fourth resistor R4 and the fifth resistor R5. The first capacitor C1 is also connected to the first terminal of amplifier N1 in sequence through the seventh capacitor C8 and the eighth capacitor C9. The second terminal of amplifier N1 is connected in parallel with the eighth capacitor C9 through the sixth resistor R6 and the eighth resistor R8. The second terminal of amplifier N1 is grounded through the seventh resistor R7. The fourth resistor R4, the fifth resistor R5, and the ninth capacitor C10... One end of the amplifier is interconnected, the ninth capacitor C10 is grounded, the third end of the amplifier N1 is grounded through the first resistor R1, the second inductor L3 and the second capacitor C2, the third end of the amplifier N1 is connected to the output terminal of the power supply circuit through the second resistor R2, the output terminal of the power supply circuit is connected to the power input terminal of the laser, the third end of the amplifier N1 is grounded through the fourth capacitor C5, the second resistor R2 is grounded through the third inductor L4 and the third capacitor C3, the second resistor R2 is grounded through the first differential mode inductor L5 and the first differential mode capacitor C4, the anode of the transient voltage suppression diode D1 is connected to the output terminal of the power supply circuit, and the cathode of the transient voltage suppression diode D1 is grounded.

[0076] The working principle of the power supply circuit in this embodiment is as follows: The external input power supply of the laser passes through the ferrite bead L1. Utilizing the hysteresis loss characteristics of the ferrite material, the high-frequency electrical energy is converted into heat energy and consumed, thus playing a preliminary role in filtering high-frequency interference. This filters out high-frequency spike signals and ripples introduced from the external input power supply. Then, the first LC high-pass filter blocks low-frequency interference signals, filtering out low-frequency spike signals and ripples in the current. When the signal output from the first LC high-pass filter enters the active double-T notch filter, the filter identifies and suppresses spike interference signals or ripple interference signals of specific frequencies. The current used to filter out spike interference signals or ripple interference signals of specific frequencies is input into the first LC low-pass filter to filter out high-frequency spike signals and ripples in the current. The second LC low-pass filter further filters out high-frequency spike signals and ripples in the current. Finally, the second LC high-pass filter filters out differential-mode interference signals in the circuit and outputs the filtered power signal.

[0077] In this embodiment, the notch filter bank helps to accurately filter out current spikes or ripples of specific frequencies in the external input current. Furthermore, when facing interference from different noise environments, the notch filter can supplement the shortcomings of other filters, enhancing the filtering effect within a specific frequency range and improving the laser's anti-interference capability under various noise conditions. Moreover, the notch filter bank, along with other filters, can form a multi-stage integrated filtering network, helping to reduce power supply noise and ripple levels in the external input current, improving the stability and reliability of the external input current in the power supply circuit, and consequently improving the stability of the laser's output power.

[0078] Example 4: This example discloses a laser, which adopts the laser housing as described in the above examples.

[0079] In this embodiment, the size and shape of the laser housing can be set according to actual needs to adapt to the usage requirements of different lasers.

[0080] In this embodiment, the power supply circuit, grounding circuit, and electromagnetic shielding cover outside the power and grounding interfaces, based on the combination of multi-level filters, provide filtering protection for the laser from different angles, improve the stability of the laser's power supply and grounding, reduce the interference of current spikes and ripples in the external input current, and improve the stability and anti-interference capability of the laser's external input current under different noise environments.

[0081] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser housing, characterized in that: include: Housing and power interface; The power interface is located on the housing and is used to connect the laser to an external power input. The power interface is equipped with a power circuit; The power supply circuit includes a ferrite bead L1, a first LC high-pass filter, a first LC low-pass filter, a second LC low-pass filter, a second LC high-pass filter, and a transient voltage suppression diode D1 connected in sequence. The first LC high-pass filter includes a first capacitor C1 and a first inductor L2; The first LC low-pass filter includes a first resistor R1, a second inductor L3, and a second capacitor C2; The second LC low-pass filter includes a second resistor R2, a third inductor L4, and a third capacitor C3; The second LC high-pass filter includes a first differential-mode capacitor C4 and a first differential-mode inductor L5; The input terminal of the power supply circuit is connected to an external power supply, and the output terminal of the power supply circuit is connected to the power input terminal of the laser.

2. The laser housing according to claim 1, characterized in that: The power supply circuit also includes a first optocoupler U1, a second optocoupler U2, and a third optocoupler U3; The input terminal of the first optocoupler U1 is connected to the output terminal of the first LC high-pass filter, and the output terminal of the first optocoupler U1 is connected to the input terminal of the first LC low-pass filter. The input terminal of the second optocoupler U2 is connected to the output terminal of the first LC low-pass filter, and the output terminal of the second optocoupler U2 is connected to the input terminal of the second LC low-pass filter. The input terminal of the third optocoupler U3 is connected to the output terminal of the second LC low-pass filter, and the output terminal of the third optocoupler U3 is connected to the input terminal of the second LC high-pass filter.

3. The laser housing according to claim 1, characterized in that: The power supply circuit also includes a notch filter bank; The notch filter bank includes at least one notch filter; The input of the notch filter bank is connected to the output of the first LC high-pass filter, and the output of the notch filter bank is connected to the input of the first LC low-pass filter.

4. The laser housing according to claim 1, characterized in that: The power interface is provided with a first electromagnetic shielding cover a.

5. The laser housing according to claim 1, characterized in that: The laser housing also includes a grounding interface, which is located on the housing and is used to connect the laser to an external grounding system; The grounding interface is equipped with a grounding circuit; The grounding circuit includes: a third resistor R3, a fifth capacitor C6, and a third LC low-pass filter; The third LC low-pass filter includes the fourth inductor L6 and the sixth capacitor C7; The input terminal of the grounding circuit is connected to the grounded end of the power supply circuit, and the output terminal of the grounding circuit is connected to the external grounding system.

6. The laser housing according to claim 5, characterized in that: A second electromagnetic shielding cover b is provided on the outside of the grounding interface.

7. A laser, characterized in that: The laser employs a laser housing as described in any one of claims 1-6 above.

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