CN102709803A - Handheld pulse laser radiator - Google Patents

Abstract

The invention provides a hand-held pulse laser radiator, which has the advantages of compact structure, small volume, high output power and good stability. The handheld pulsed laser radiator is divided into two wavelengths of 1064nm and 1550nm. The laser radiator includes a pulsed laser, a power supply unit, a single-chip control unit, a laser drive unit and a laser beam expander unit; the pulsed laser is used to output laser beams of two wavelengths ;The power supply unit supplies power to the control unit and the laser drive unit, specifically, it supplies power to the single-chip microcomputer system of the drive unit and its peripheral circuits, and provides energy for the laser drive unit to light the xenon lamp; The drive unit controls it to output a laser drive signal of a specific frequency; the laser drive unit instantly lights up the xenon lamp when the drive signal arrives to drive the laser to work; the laser beam expansion unit is used to expand the light energy output by the laser and then output it.

Description

Handheld Pulse Laser Radiator

technical field

The invention relates to a hand-held pulsed laser radiator, which is used for demonstration and inspection of laser target irradiation sources of photoelectric products and related products.

Background technique

In the prior art, the Nd:YAG laser consists of a resonant cavity subsystem, a pre-ionization and main discharge subsystem, a cooling subsystem, a high-voltage power supply subsystem, an energy storage and discharge subsystem, a trigger subsystem, a pulse switch subsystem, and a control subsystem, etc. Composed of many parts and complex structures, the laser will inevitably lead to a large volume, which limits the scope of use of this type of laser system in the field. This article introduces the design of DC power supply using ordinary charging and discharging batteries. Through the circuit, the voltage of the rechargeable battery is boosted to DC 12V, and the NE555 chip is used to form an oscillation circuit, which drives the DC 12V voltage to DC 20kV through a high-voltage transformer and a voltage doubler rectifier circuit. as the charging voltage. At the same time, the compact insulation and anti-electromagnetic interference structure design is adopted to realize the stable operation of the handheld Nd:YAG pulsed laser.

Contents of the invention

The object of the present invention is to provide a hand-held pulsed laser radiator with compact structure, small volume, high output power and good stability.

The handheld pulsed laser radiator is divided into two wavelengths of 1064nm and 1550nm. The laser radiator includes a pulsed laser, a power supply unit, a single-chip control unit, a laser drive unit and a laser beam expander unit; the pulsed laser is used to output laser beams of two wavelengths ;The power supply unit supplies power to the control unit and the laser drive unit, specifically, it supplies power to the single-chip microcomputer system of the drive unit and its peripheral circuits, and provides energy for the laser drive unit to light the xenon lamp; the single-chip control unit outputs a pulse signal with a set frequency and connects the laser The drive unit is used to control it to output a laser drive signal of a specific frequency; the laser drive unit lights up the xenon lamp instantaneously when the drive signal arrives to drive the laser to work; the laser beam expansion unit is used to expand the light energy output by the laser and then output it.

The laser light generated by the pulse laser is oscillated and amplified by the front and rear reflectors, and the coupled output laser is expanded and output by the optical system.

The single-chip control unit (MCU) controls whether the laser drive unit is working continuously. If it is in the continuous working state, it will emit a pulse signal every second to make the drive system drive the lamp pump to output laser; if it is not in the continuous working state, each time the key is pressed Output a laser.

Power supply unit: the power supply is a lithium battery power supply, which supplies power to the single-chip microcomputer control unit, laser drive unit and laser beam expander unit at the same time;

The laser irradiator can manually control point emission or automatically control uninterrupted emission of pulsed laser.

The MCU includes a detection button. When the detection button is pressed, the current amplifier is controlled to open the optocoupler, the optocoupler is closed instantly, and the driver starts to work. Set the number of times the laser works inside the MCU, and the MCU can control the number of times the optocoupler is turned on to drive the driver to work; if the button is pressed continuously, the laser will output a single laser pulse every 1 second, and at the same time, in order to protect the laser, it will work 20 times After that, stop the laser pulse signal output; at this time, if you need to output the laser pulse again, you need to release and press the button again to trigger the laser to work. During the working process of the laser, the laser will stop working if you release the button at any time.

The laser uses an air-cooled lamp to pump a solid-state laser, and the single pulse output power is greater than 1mJ.

Beneficial effects of the present invention:

In the present invention, the number of particles of the working substance of the lamp pump is reversed, and the laser is excited between the rear reflector and the coupling output, and then coupled out; after the laser is emitted, it passes through the beam expansion system, and finally emits the expanded laser pulse.

Description of drawings

Fig. 1 is the schematic diagram of laser working principle of the present invention;

Fig. 2 is a schematic diagram of the laser radiator of the present invention;

Figure 3 is a schematic diagram of the hardware of the MCU control system.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods are provided And specific operation process, but protection scope of the present invention is not limited to following embodiment.

The first embodiment of the present invention is a handheld 1064nm laser, and the parameters are:

1) Wavelength: 1064nm;

2) Frequency: 1HZ;

3) Pulse width: <20ns;

4) Output power: >1mJ;

5) Spot diameter: ≥40mm;

6) Divergence angle: <3mrad;

7) Power supply: 24v battery or external 220V AC power supply;

8) Spatial mode: near TEM00;

9) Energy stability: <±5%;

10) Working method: work for 30s, rest for 60s and then work again;

11) Dimensions (including lens): 300mm(L)X 90(W)X 260(H).

The second embodiment of the present invention is a handheld 1570nm laser, and the parameters are:

1) Wavelength: 1570nm;

2) Frequency: 1Hz;

3) Pulse width: <20ns;

4) Output power: >1mJ;

5) Spot diameter: ≥40mm;

6) Divergence angle: <3mrad;

7) Power supply: 24v battery or external 220V AC power supply;

8) Spatial mode: near TEM00;

9) Energy stability: <±5%;

10) Working method: work for 30s, rest for 60s and then work again;

11) Dimensions (including lens): 310mm(L)×90(W)×260(H).

The operation method is to first turn on the system power switch to ensure that the power supply is fully charged, and then select the laser working mode, whether it is continuous working mode or single working mode, and use the aiming system to align the target, and lightly touch the laser switch. In this way, the laser can To work, emit pulsed laser light.

Claims (7)

1. hand-hold type pulsed laser radiation device is divided into two kinds of wavelength of 1064nm and 1550nm, and it is characterized in that: laser irradiator comprises pulse laser, power supply unit, Single-chip Controlling unit, laser drive unit and laser beam expanding unit; Pulse laser is used to export the laser beam of two kinds of wavelength; Power supply unit is control unit and laser drive unit power supply, is in particular in SCM system and peripheral circuit power supply thereof into driver element, lights xenon lamp for laser drive unit energy is provided; The pulse signal of Single-chip Controlling unit output setpoint frequency connects laser drive unit, controls the laser-driven signal of its output CF; Instant igniting xenon lamp when laser drive unit arrives in drive signal, drive laser work; The laser beam expanding unit is used for the light energy of laser output is expanded the output of bundle back.

2. hand-hold type pulsed laser radiation device as claimed in claim 1 is characterized in that: the laser that described pulse laser produces shakes amplification through the front and back speculum, and the laser of coupling output expands bundle output laser through optical system.

3. according to claim 1 or claim 2 hand-hold type pulsed laser radiation device; It is characterized in that: whether Single-chip Controlling unit (MCU) control laser drive unit is continuous operation; If under the continuous duty; Then launch the pulsatile once signal each second, make drive systems lamp pump output laser; If not continuous duty, laser of then each button output.

4. according to claim 1 or claim 2 hand-hold type pulsed laser radiation device, it is characterized in that: power supply unit: power supply is a lithium electricity power supply, supplies power for simultaneously Single-chip Controlling unit, laser drive unit and laser beam expanding unit.

5. according to claim 1 or claim 2 hand-hold type pulsed laser radiation device is characterized in that: manually control point emission or control uninterrupted emission pulse laser automatically of laser irradiator.

6. hand-hold type pulsed laser radiation device as claimed in claim 3, it is characterized in that: described MCU comprises the detection button, after the detection button was pressed, the Control current amplifier was opened optocoupler, optocoupler moment closure, driver is started working.At the good laser works number of times of MCU inner setting, MCU just can control the number of times of opening of optocoupler, thereby drives drive operation; If button continues to pin, then laser was exported single laser pulse in per 1 second, simultaneously in order to protect laser, after work 20 times, stopped laser pulse signal output; This moment, laser pulse was exported again if desired, need unclamp again and push button, and triggered laser works, in the process of laser works, whenever unclamped the button laser and all quit work.

7. hand-hold type pulsed laser radiation device as claimed in claim 2 is characterized in that: laser adopts air-cooled lamp pump light-pumped solid state laser, and the pulse power output is greater than 1mJ.

Images