CN107643127A - A kind of portable heavy caliber real time laser energy gauge and method - Google Patents

Abstract

The invention discloses a kind of portable heavy caliber real time laser energy gauge and its method, the system is mainly made up of diaphragm, heavy caliber convergent lens, spectroscope, optical chopper, high speed pyroelectricity probe, infrared CCD, intelligent signal converter and processing unit.The pulse laser that remote laser range finder projects converges to spectroscope after diaphragm, then by heavy caliber convergent lens；Most of laser is fallen in spectroscope transmission, its reflection laser injects high speed pyroelectricity probe after optical chopper, infrared CCD monitors the laser spot position in high speed pyroelectricity probe in real time, the data collected by intelligent signal converter and processing unit to high speed pyroelectricity probe are handled, and obtain measurement result.The present invention not only solves existing for prior art the technical problems such as bore is small, speed is slow, energy density damage threshold is low simultaneously, the real-time measurement to remote laser range finder shoot laser energy is realized, and has had the power measurement function for continuous laser concurrently.

Description

A portable large-aperture real-time laser energy measurement system and method

technical field

The invention belongs to the field of design photoelectric measurement, in particular to a laser energy measurement system and method.

Background technique

With the gradual development of laser technology, the application of laser is becoming more and more popular, especially after a long-range laser rangefinder has been used for a period of time, it is usually impossible to judge how much its output energy has attenuated, or how much actual output energy is. The pulse laser emitted by the pulsed laser range finder is usually a single emission, but some laser range finders emit bursts of pulses in order to obtain higher measurement accuracy. Generally speaking, the energy of a single pulsed laser is one of the key indices to measure the range of a pulsed laser range finder, and the pulse train emitted by some laser range finders is one of the indices to measure the quality of the range finder. The frequency of a single pulse in each pulse train is about 2KHz, so to measure the information of the pulse train, it is necessary to enable the pyroelectric probe and subsequent devices to perform high-speed measurement. The wavelength of the laser emitted by the pulsed laser rangefinder is 1064nm, and the pulse width is generally only about 10ns, and the output aperture of the long-range laser rangefinder is generally about 100mm, which requires the measurement system to have a larger incident aperture. Although the energy meter in traditional scientific experiments can also measure the pulsed laser energy, its aperture is usually not large enough, and the pulse frequency that traditional pyroelectric probes can handle is only hundreds of Hz at most, which cannot meet real-time requirements. sexual demands. Moreover, the laser energy measuring device in the prior art also has the disadvantages that the laser energy measuring equipment is relatively large in size, small in diameter, low in measurement frequency, and inconvenient to carry.

There are many types of laser energy measurement equipment. So far, the domestic laser energy measurement mainly includes: the High Power Laser Physics Joint Laboratory of the Shanghai Institute of Optics and Mechanics, Chinese Academy of Sciences, and Lin Kangchun et al. used for the triple frequency of Shenguang II. Energy meter, but its caliber is 300mm, and the measuring energy is 2000J, but overall it is expensive and bulky, and it is not suitable for laser distance measuring machines. The JK-80 large-diameter laser energy meter developed by Shanghai Institute of Optics and Mechanics, Chinese Academy of Sciences, Wang Ruihua and others has a diameter of only 80mm, which is not large enough, and the measurement time interval is one minute, and the measurement speed is too slow, so it is not applicable. for laser range finders. Xi’an Institute of Applied Optics, Lei Junjie et al.’s large-aperture laser energy meter has a caliber of 100mm, no converging lens, and the incident laser light is directly incident on the pyroelectric probe, so that the actual measured energy density damage threshold is low, so this This design is also not suitable for pulsed laser rangefinders.

Contents of the invention

The purpose of the present invention is to provide a portable large-diameter real-time laser energy measurement system and method in order to measure the energy of a remote laser rangefinder and detect its energy attenuation, which not only solves the problems of measuring the output energy of a remote laser rangefinder. Due to technical problems such as small caliber, slow speed, and low energy density damage threshold, the real-time measurement of the energy of the laser (pulse laser) emitted by the remote laser range finder is realized, and it also has the power measurement function for continuous laser. In addition, the present invention can also solve the technical problem that the current laser energy measuring equipment has a large volume and is inconvenient to carry.

The technical scheme that the present invention adopts is as follows:

A portable large-caliber real-time laser energy measurement system, including

The large-aperture converging lens is used to converge the pulsed laser/continuous laser emitted by the remote laser rangefinder and enter the beam splitter;

The beam splitter is used to reflect and transmit the pulsed laser/continuous laser, and inject the reflected pulsed laser into the high-speed pyroelectric probe;

The optical chopper, controlled by a stepping motor, is used to control the position of the light hole, allowing the pulsed laser reflected by the beam splitter to pass through completely; the continuous laser beam incident to the optical chopper from the beam splitter is modulated into a rectangular pulsed laser, and controlled The modulation frequency of the rectangular pulse laser;

The high-speed pyroelectric probe is used to measure the energy data of the rectangular pulse laser/pulse laser incident through the optical chopper, and transmit the measured energy data to the intelligent signal converter;

An intelligent signal converter for converting received energy data into a software-processed signal and passing it to the processing device;

The processing device is used to receive and process software processing signals to obtain the measurement results of the rectangular pulse laser/pulse laser energy, or calculate the power of the continuous laser according to the modulation frequency and the rectangular pulse laser energy.

Further, it also includes an infrared CCD, which is used to monitor the position of the laser spot image on the high-speed pyroelectric probe irradiated by the rectangular pulsed laser/pulse laser (the laser spot image on the high-speed pyroelectric probe follows the optical chopper, beam splitter, The mirror is reflected by the infrared CCD), and the detected laser spot image is transmitted to the processing device.

Further, it also includes a heat sink device for absorbing the heat generated by the high-speed pyroelectric probe.

Further, it also includes a heat trash can, which is used to discharge the pulsed laser/continuous laser energy and the redundant energy in the space after being transmitted by the spectroscope.

Further, the beam splitter is a beam splitter with a reflectivity of 5%-10%.

Further, it also includes a housing for installing the large-diameter converging lens, beam splitter, optical chopper, high-speed pyroelectric probe and processing device in it, and the position where it (ie the housing) is opposite to the large-diameter converging lens An opening is left, which acts as a diaphragm. The diaphragm limits the aperture and spot size of the received beam.

Further, the beam splitter is set at 45° to the optical axis.

Further, the diameter of the large-aperture converging lens is 120mm.

A portable large-caliber real-time laser energy measurement method, comprising the following steps:

(a). The large-aperture converging lens converges the pulsed laser/continuous laser emitted by the remote laser rangefinder and enters the beam splitter;

(b). The beamsplitter reflects and transmits the pulsed laser/continuous laser, and the reflected pulsed laser is incident on the high-speed pyroelectric probe; the beamsplitter is incident on the optical chopper through the optical chopper controlled by the stepping motor The continuous laser is modulated into a rectangular pulse laser, and the modulation frequency of the rectangular pulse laser is controlled; and the position of the light hole is controlled to allow the pulse laser reflected by the beam splitter to pass through completely;

(c). The high-speed pyroelectric probe measures the energy data of the rectangular pulse laser/pulse laser incident through the optical chopper, and transmits the measured energy data to the intelligent signal converter;

(d). The intelligent signal converter converts the received energy data into a software processing signal and transmits it to the processing device;

(e). The processing device receives and processes the software to process the signal, and obtains the measurement result of the rectangular pulse laser/pulse laser energy, or calculates the power of the continuous laser according to the modulation frequency and the energy of the rectangular pulse laser.

Further, the method also includes the following steps:

Infrared CCD is used to monitor the position of the laser spot image of the rectangular pulsed laser/pulse laser irradiated on the high-speed pyroelectric probe, and the monitored laser spot image is transmitted to the processing device;

Further, the method also includes the following steps:

A heat sink is used to absorb the heat generated by the high-speed pyroelectric probe.

Further, the method also includes the following steps:

The heat trash can is used to discharge the pulsed laser energy transmitted by the spectroscope and the redundant energy in the space.

A laser power measurement system comprising

The converging lens is used to converge the continuous laser light emitted by the laser rangefinder and enter the beam splitter;

The beam splitter is used to reflect and transmit the continuous laser light, and inject the reflected continuous laser light into the optical chopper;

The optical chopper, controlled by a stepping motor, is used to control the position of the light hole, allowing the pulsed laser reflected by the beam splitter to pass through completely; the continuous laser beam incident to the optical chopper from the beam splitter is modulated into a rectangular pulsed laser, and controlled The modulation frequency of the rectangular pulse laser;

The pyroelectric probe is used to measure the energy data of the pulsed laser incident through the optical chopper, and transmit the measured energy data to the intelligent signal converter;

An intelligent signal converter for converting received energy data into a software-processed signal and passing it to the processing device;

The processing device is used to receive the software processing signal, and calculate the power of the continuous laser according to the modulation frequency and the energy of the rectangular pulse laser.

In summary, owing to adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

1. The main improvement point of the present invention is that adopting a large-diameter converging lens can converge the incident light (continuous laser light), utilize the light splitting effect of the beam splitter, reduce the laser energy reflected on the high-speed pyroelectric probe, and can avoid the laser energy caused by high-speed The laser energy received by the pyroelectric probe is too high and damaged, and it can also avoid inaccurate measurement due to the low laser energy received by the high-speed pyroelectric probe, which expands the measurement range of laser energy and solves the problem of long-distance laser distance measurement. There are technical problems such as small caliber, slow speed, and low energy density damage threshold when the machine emits energy, and the real-time measurement of the laser (continuous laser) energy emitted by the remote laser range finder is realized; at the same time, due to the addition of the optical chopper, The optical chopper is controlled by a stepping motor, and the continuous laser beam incident on the high-speed pyroelectric probe is modulated into a rectangular pulse laser, and the modulation frequency of the rectangular pulse laser is controlled. The processing device can pass the modulation frequency and the energy of the rectangular pulse laser. The power of the continuous laser is calculated; therefore, the present invention not only can measure the energy of the pulsed laser, but also has the function of measuring the power of the continuous laser.

Due to the large-diameter converging lens with a short focal length, the large-diameter converging lens converges the incident light, and the overall composition of the large-diameter converging lens, the beam splitter, and the high-speed pyroelectric probe can control the scale of the entire optical path, and the entire optical path of the system can be controlled at With a reasonable size, the volume of the system is reduced, thereby improving the portability of the entire system, and solving the technical problem that the laser energy measuring equipment in the prior art is relatively large and unfavorable for portability.

In addition, due to the role of the spectroscope and the high-speed pyroelectric probe, it can not only reduce the damage probability of the high-speed pyroelectric probe, but also ensure that the high-speed pyroelectric probe detects the laser, and utilizes the excellent processing ability of the high-speed pyroelectric probe Fast data processing enables the present invention to achieve the purpose of real-time measurement of laser energy in addition to portability.

2. The present invention also provides a separate laser power measurement system, which controls the optical chopper through a stepping motor, realizes the modulation of the laser, controls the modulation frequency, and the processing device can pass the energy and modulation frequency of the measured laser pulse Calculate the power of the continuous laser. Specifically, when the received laser energy is a laser pulse modulated by a continuous laser, the stepper motor controls the optical chopper chopping frequency to be 4Hz (just for example, other frequencies can also be used), and the pyroelectric probe The four pulse energies are measured, and the processing device (inside the software) sets the cumulative number of pulses to 4. When the processing device receives the data to be processed transmitted from the intelligent signal converter, the processing device accumulates the four pulse energies, one of which is The energy value obtained by adding up the pulse energy measured in seconds is the power value of the continuous laser. After accumulating the pulse energy for four times, the processing device starts the next accumulation cycle. The traditional method is to directly use the power sensor to measure the power, but this application cleverly adds a chopper to the existing laser energy measurement equipment, so that it can pass the chopper and heat without additional power sensor. With the cooperation of the discharge probe, the power measurement can be realized.

3. Install large-diameter converging lenses, beam splitters, optical choppers, high-speed pyroelectric probes and processing devices and other components (including heat sink devices, infrared CCDs and thermal trash cans in other schemes, etc.) Inside, it is integrated into a portable laser energy measuring device; and this application directly uses the opening on the casing as the diaphragm, which not only simplifies the structure, but also reduces the cost.

4. The heat sink device is a material with high thermal conductivity, and it is placed close to the high-speed pyroelectric probe to absorb the redundant heat generated by the high-speed pyroelectric probe due to long-term work or testing, which is helpful for the high-speed pyroelectric probe For the release of heat, the combination of the heat sink device and the high-speed pyroelectric probe can increase the average power damage threshold of the high-speed pyroelectric probe.

5. The use of infrared CCD is convenient for monitoring the position of the laser spot on the high-speed pyroelectric probe during the operation of the system, so as to ensure that the high-speed pyroelectric probe can accurately measure the laser energy.

6. In an integrated optical system, redundant heat will inevitably be generated in the system, especially the light transmitted through the spectroscope, which will affect the measurement of the high-speed pyroelectric probe, and the heat trash can These excess stray light and heat can be discharged; the heat trash can is located behind the spectroscope, which mainly absorbs the transmitted energy of the spectroscope, and can discharge the redundant heat generated by the system to the outside of the system, reducing the loss of energy in the closed measurement system/device due to The heat generated by scattered light will affect the measurement of the energy probe; the heat trash can can be a micro bellows, a material with a high absorption rate, etc., and it is also required that the inner surface of the system shell be made of a rough, high absorption rate material, which is also a guarantee system A method of precision.

7. In the present invention, a beam splitter with a reflectivity of 5% to 10% is preferred, and an included angle of 45° between the optical axis and the beam splitter is ensured. The spectroscope should also be made of high-quality quartz, and the reflective surface is coated with a 1064nm high energy density damage threshold AR coating, and the transmission surface is coated with a 1064nm high energy density damage threshold AR coating, which not only ensures the accuracy, but also improves the energy density damage of the spectroscope. threshold.

8. The present invention uses an optical chopper, which can convert continuous laser light into pulsed laser light, which can increase the average power and make the measurement more accurate; at the same time, when measuring continuous laser light, it is required that the energy of the continuous laser light cannot be too large, otherwise It is easy to damage the pyroelectric detector; and, the narrow pulse laser that this application is mainly aimed at, the stepper motor can ensure that the laser spot of the pulse laser can completely pass through the optical hole of the optical chopper, and the optical chopper is limited to the laser energy Measurements are irrelevant.

9. The high-speed pyroelectric probe used in the present invention has a measurement range of 0.2mJ-10J, but due to the splitting of the beam splitter, the actual measurement range can reach 4mJ-200J (when the reflectivity of the beam splitter is 5%); and its internal processing The frequency can be as high as 2KHz, combined with high-speed intelligent signal converter and processing device (software processing), even if some laser range finders emit pulse trains, the high-speed pyroelectric probe can also process data in real time.

10. The present invention uses a processing device to perform data processing on the software part. The processing device obtains pulsed laser energy data from an intelligent signal converter. According to the design of the entire system, the processing device performs statistical analysis on the received data, and can also be used according to specific needs. After storing and displaying, the processing device can intuitively observe the change and magnitude of the incident laser energy.

Description of drawings

Figure 1 System schematic diagram;

Fig. 2 specific implementation process flow—hardware;

Fig. 3 specific implementation process flow-software;

In Fig. 1: 1—diaphragm (with the housing opening at the large-diameter converging lens as the diaphragm), 2—large-diameter converging lens, 3—beam splitter, 4—heat trash can, 5—optical chopper, 6 —infrared CCD (miniature), 7—high-speed pyroelectric probe, 8—heat sink device, 9—processing device, 10—intelligent signal converter, 11—stepping motor, 12—power supply.

detailed description

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All features disclosed in this specification, except for mutually exclusive features and/or steps, can be combined in any way.

The present invention will be further introduced below in conjunction with accompanying drawings 1 to 3, but it is not intended to limit the present invention and its application.

Example 1

A portable large-caliber real-time laser energy measurement system, including

Power supply 12, providing working power supply;

Large-diameter converging lens 2, used to converge the pulsed laser/continuous laser emitted by the remote laser range finder, and enter the beam splitter;

The beam splitter 3 is used to reflect and transmit the pulsed laser/continuous laser, and inject the reflected pulsed laser into the high-speed pyroelectric probe;

The optical chopper 5 is controlled by a stepping motor 11, and is used to control the position of the light hole so that the pulsed laser reflected by the beam splitter passes through completely; the continuous laser beam incident on the beam splitter into the optical chopper is modulated into a rectangular pulsed laser, And control the modulation frequency of the rectangular pulse laser;

The high-speed pyroelectric probe 7 is used to measure the energy data of the rectangular pulse laser/pulse laser incident through the spectroscope, and transmit the measured energy data to the intelligent signal converter;

The intelligent signal converter 10 adopts a USB interface for converting the received energy data into a software processing signal (that is, a signal that the software in the processing device can process), and transmits it to the processing device;

The processing device 9, preferably a tablet computer, is used to receive and process the software processing signal, obtain the measurement result of the rectangular pulse laser/pulse laser energy, or calculate the power of the continuous laser according to the modulation frequency and the rectangular pulse laser energy (if the remote laser distance measurement The machine emits a pulsed laser, so the power is not calculated), for the received laser pulse (rectangular pulse) modulated by the continuous laser, the software internally accumulates the pulse energy obtained in one second to obtain the energy value, which is the continuous laser power value.

The laser pulse of the remote laser range finder: the wavelength is 1064nm, the pulse width is about 10ns, and the diameter of the outgoing laser beam is about 100mm.

Large-aperture converging lens 2, using F#3 converging lens, 120mm in diameter, using high-quality quartz as material, the front and back of the lens must be coated with 1064nm high energy density damage threshold anti-reflection coating, so that the energy density damage threshold is about 5J/ at 1064nm wavelength cm ² , the transmission accuracy rate is 99.9%, which not only ensures the accuracy, but also makes the converging lens have a higher energy density damage threshold.

The power supply 12 is a lithium ion battery, and the lithium ion battery (12V lithium battery) can realize normal power supply to the whole system, thereby making the system easy to carry.

The beam splitter 3 uses a beam splitter with a reflectivity of 10%, which reduces the laser energy incident on the high-speed pyroelectric probe and reduces the probability of damage to the high-speed pyroelectric probe.

Example 2

The main difference between this embodiment and Embodiment 1 is that, compared with the beam splitter with a reflectance of 10%, this embodiment uses a beam splitter 3 with a reflectance of 5%, which not only reduces the incidence of high-speed pyroelectric The laser energy on the probe 7 reduces the damage probability of the high-speed pyroelectric probe, and can expand the energy measurement range on the premise that the high-speed pyroelectric probe 7 can accurately detect the laser energy.

In addition, it should be noted that when selecting beam splitters 3 with different emissivity, it should be determined according to the amount of energy to be measured. The present invention only provides two commonly used spectroscopes with different splitting ratios, that is, spectroscopes with a reflectivity of 5% or 10%. Therefore, there will also be spectroscopes with a selectable reflectivity lower than 5% or a reflectivity higher than 10%. mirror.

Example 3

The main difference between this embodiment and Embodiment 1 is that it also includes a housing for installing the large-diameter converging lens 2, the beam splitter 3, the optical chopper 5, the high-speed pyroelectric probe 7 and the processing device 9, etc. Inside, and there is an opening at the position opposite to the large-aperture converging lens 2, which is used as the diaphragm 1. Diaphragm 1 limits the aperture and spot size of the received beam.

Example 4

The main difference between this embodiment and Embodiment 1 is that it further includes a heat sink device 8 for absorbing the heat generated by the high-speed pyroelectric probe 7 .

Example 5

The main difference between this embodiment and Embodiment 1 is that the infrared CCD6 adopts the USB interface, and is used to monitor the position of the laser spot image on the high-speed pyroelectric probe 7 irradiated by the rectangular pulsed laser/pulse laser (on the high-speed pyroelectric probe The laser spot image is sequentially reflected along the optical chopper 5 and the beam splitter 3 to the infrared CCD6), and the monitored laser spot image is transmitted to the processing device 9.

Example 6

The main difference between this embodiment and Embodiment 1 is that it also includes a heat trash can 4, which is used to discharge the pulsed laser/continuous laser energy and the redundant energy in the space after being transmitted by the spectroscope.

Example 7

This embodiment is a combination of the technical solutions of Embodiments 1 to 6, and is also the most preferred embodiment of the present application. This implementation is mainly aimed at narrow pulse lasers, a portable large-caliber real-time laser energy measurement method, including the following steps:

(1). The long-distance laser range finder emits pulsed laser light, and the incident pulsed laser light enters the large-diameter converging lens 2 through the diaphragm;

(2). The pulsed laser light emitted from the large-aperture converging lens 2 converges on the beam splitter 3;

(3). The pulsed laser light transmitted through the beam splitter 3 enters the heat trash can 4; the pulsed laser light reflected by the beam splitter enters the high-speed pyroelectric probe 7;

(4). The heat sink device 8 absorbs the excess heat generated by the high-speed pyroelectric probe, the energy data measured by the high-speed pyroelectric probe 7 is transmitted to the processing device 9 via the intelligent signal converter 10, and the post-processing device 9 processes the corresponding data ; The position of the laser spot image incident on the high-speed pyroelectric probe 7 is monitored by the infrared CCD6 during system operation.

During implementation, the following methods are adopted:

Each optical device (that is, the large-aperture converging lens 2 and the beam splitter 3, etc.) is placed at an appropriate distance, and each device is adjusted on the same optical path, and the inner surface of the system housing should be black and rough. Signal converters and processing devices, etc.

Turn on the power of the system, and then the incident light (narrow pulse laser) is incident on the large-aperture converging lens along the optical axis. The transmittance error of the aperture converging lens is less than 0.1%.

Adjust the beam splitter 3 and fix the optical axis at 45° to ensure that only about 5% of the incident pulsed laser light is finally incident on the high-speed pyroelectric probe 7, and the error of the reflectivity of the beam splitter is also less than 0.1%.

A miniature fan is placed behind the beamsplitter as part of the thermal trash can 4, to remove all heat generated by the transmitted light, and also to remove some of the heat generated by the system itself during operation. Make sure the micro fan is able to remove heat from the system that might affect the PE-50C's measurements.

Adjust the optical chopper 5. Since the incident is a narrow pulse laser, the optical chopper 5 can adjust the position of the aperture through the stepper motor electrically connected to it to ensure that the pulsed laser can pass through the optical chopper 5 completely.

At this time, whether the laser spot is completely hit on the high-speed pyroelectric probe 7 can be monitored by the infrared CCD 6 (micro). If the laser spot is not completely hit on the high-speed pyroelectric probe 7, the beam splitter 3 can be adjusted to ensure The light spots are all within the working surface of the high-speed pyroelectric probe 7 .

The model of the high-speed pyroelectric probe 7 is PE-50C, and its measurement error is about ±3%. Since the error of the large-aperture converging lens and the beam splitter is much smaller than its own error, the overall root mean square error is about ±3%. The energy measurement range of the pyroelectric probe is 0.2mJ-10J, the actual measurement range of the system is 4mJ-200J, the working frequency can reach 2KHz, the diameter is φ46, and the energy density threshold is 0.1J/cm ² . The laser spot actually received by the high-speed pyroelectric probe 7 should be smaller than φ40, so that even if the incident light has a slight angle deviation, it will not affect the measurement of the actual energy. The parameters of PE-50C fully meet the requirements of the actual laser range finder. And a copper sheet with high thermal conductivity is placed under the high-speed pyroelectric probe 7 as a heat sink device 8 to absorb the energy overflowed by the high-speed pyroelectric probe 7 due to long-term operation or excessive incident energy.

The processing steps of the processing device (software part) are as follows:

1. Turn on the power and software;

2. Detection equipment (that is, the intelligent signal processing module 10 and the high-speed pyroelectric probe 7);

3. When the device is detected, turn on the device and check whether the device can work normally;

4. Set device parameters;

5. Detect whether there is a pulsed laser;

6. When the pulsed laser is detected, receive the data of the laser energy of the high-speed pyroelectric probe;

7. Statistics of the measured data;

8. Display the data (image), and confirm whether to store the energy and parameter data; after confirming the storage, store the energy and parameter data;

9. Confirm whether to close;

10 When the confirmation is closed, store the software settings;

11. Turn off the power and software.

The present invention adopts the large-caliber converging lens 2, which can converge the incident light. At the same time, because the large-diameter converging lens 2 has a shorter focal length, the large-diameter converging lens 2 converges the incident light, and then combines the beam splitter 3 and the high-speed pyroelectric probe 7 to make the The entire optical path of the system is controlled under a reasonable size, which reduces the volume of the system and makes it more portable. The signal transmitted from PE-50C is converted into a signal that can be processed by the processing device 9 (software part) through the intelligent signal converter 10 . The processing device 9 acquires the data transmitted from the high-speed pyroelectric probe 7, and calculates the actual energy of the incident pulse laser according to the actual attenuation of the system. This system needs to store the data, and the position change of the data/image can be visually seen on the interface of the processing device 9, so the processing device 9 will also store and display the data accordingly. All software modules run on the processing device 9, and the real-time display of infrared CCD6 (miniature) can also be displayed on the processing device 9 simultaneously, therefore, the whole system is portable, and solves the laser problem existing in the prior art The energy measurement equipment is large in size, which is not conducive to the technical problems of carrying; in addition, due to the role of the spectroscope 3 and the high-speed pyroelectric probe 7, it can not only reduce the damage probability of the high-speed pyroelectric probe 7, but also ensure the high-speed pyroelectric probe 7. The electrical probe 7 detects the laser light, and uses the high-speed pyroelectric probe 7 to perform fast data processing, so that the present invention can achieve the purpose of fast measurement of laser energy in addition to portability.

Example 8

The main difference from Embodiment 6 is that the laser to be tested emits continuous laser light.

(1). The laser to be tested emits continuous laser light, and the continuous laser light limited by the diaphragm 1 enters the large-diameter converging lens 2:

(2). The continuous laser light emitted from the large-aperture converging lens 2 converges on the beam splitter 3:

(3). The continuous laser light transmitted through the beam splitter 3 enters the thermal garbage bin 4; the continuous laser light reflected by the beam splitter 3 is modulated by the optical chopper 5 (the optical chopper 5 is controlled by a stepping motor to modulate the incoming Laser, control the modulation frequency), and incident to the high-speed pyroelectric probe 7;

(4). The heat sink device 8 absorbs the excess heat generated by the high-speed pyroelectric probe, and the energy signal measured by the high-speed pyroelectric probe is transmitted to the processing device 9 via the intelligent signal converter 10, and the post-processing device 9 according to the modulation frequency and The power of the continuous laser is obtained by calculating the rectangular pulse laser energy; the position of the laser spot image incident on the high-speed pyroelectric probe 7 is monitored by the infrared CCD6 during system operation.

When the incident laser is a continuous laser, the processing device calculates the continuous laser power according to the modulation frequency as follows:

When the received laser energy is a laser pulse modulated by a continuous laser, the stepper motor 11 controls the optical chopper speed to be 25 revolutions per second in this example, and its modulation frequency is 100Hz (just for example, it can also be other frequencies ), the high-speed pyroelectric probe measures the pulse energy W _n 100 times per second, the processing device (inside the software) sets the number of accumulated pulses to be 100, and when the processing device 9 receives the data to be processed transmitted from the intelligent signal converter 10, The processing device 9 accumulates 100 pulse energies W _n (n=1, 2, 3..., 100), and the power is defined as: The ratio of the sum of energy in one second measured by the pyroelectric probe to the time in one second is the power of the continuous laser. That is, the energy value obtained by adding up the pulse energy measured in one second is the power value of the continuous laser. In this embodiment, the power calculation formula is: After accumulating the pulse energy W _n for 100 times, the processing device starts the next accumulation cycle.

Example 9

This embodiment provides a separate laser power measurement system, which detects the power of continuous laser, and the system includes

The converging lens is used to converge the continuous laser light emitted by the laser rangefinder and enter the beam splitter;

The beam splitter is used to reflect and transmit the continuous laser light, and inject the reflected continuous laser light into the optical chopper;

An optical chopper, controlled by a stepping motor, is used to modulate the continuous laser beam incident on the optical chopper into a rectangular pulsed laser and control the modulation frequency of the rectangular pulsed laser;

The pyroelectric probe is used to measure the energy data of the continuous laser incident through the optical chopper, and transmit the measured energy data to the intelligent signal converter;

An intelligent signal converter for converting received energy data into a software-processed signal and passing it to the processing device;

The processing device is used to receive the software processing signal, and calculate the power of the continuous laser according to the modulation frequency and the energy of the rectangular pulse laser.

The calculation method of power is as described in Example 8.

Although the present invention has been described in detail above, it should be understood that not every embodiment only includes an independent technical solution. The description of the description is for easy understanding of the present invention. Where the claims define the scope, those skilled in the art can make appropriate changes to the examples.

The parts not described in detail in the present invention belong to the well-known technologies in the art, and those skilled in the art can implement them according to the existing descriptions without any creative effort, so they are not repeated here.

Claims (10)

1. A kind of 1. portable heavy caliber real time laser energy gauge, it is characterised in that including

   Heavy caliber convergent lens, the pulse laser/continuous laser for remote laser range finder to be projected are assembled, and are incided point Light microscopic；

   Spectroscope, for reflection and transmitted pulse laser/continuous laser, and the pulse laser after reflection is incided into high speed heat and released Electric probe；

   Optical chopper, by step motor control, for controlling thang-kng hole site, allow complete by the pulse laser of dichroic mirror Pass through；The continuous laser that spectroscope is incided to optical chopper is modulated to rectangular pulse laser, and control rectangle pulse laser Modulating frequency；

   High speed pyroelectricity probe, for measuring the energy number through the incident next rectangular pulse laser/pulse laser of optical chopper According to, and the energy datum measured is delivered to intelligent signal converter；

   Intelligent signal converter, for the energy datum received to be converted into software processing signal, and it is delivered to processing unit；

   Processing unit, for receiving and handling software processing signal, obtain the measurement knot of rectangular pulse laser/pulsed laser energy Fruit, or calculate to obtain the power of continuous laser according to modulating frequency and rectangular pulse laser energy.
2. 2. a kind of portable heavy caliber real time laser energy gauge as claimed in claim 1, it is characterised in that also include Infrared CCD, for monitoring the position of rectangular pulse laser/representation of laser facula of the pulsed laser irradiation in high speed pyroelectricity probe Put, and the representation of laser facula monitored is delivered to processing unit.
3. 3. a kind of portable heavy caliber real time laser energy gauge as claimed in claim 1, it is characterised in that also include Heat sink device, for absorbing heat caused by high speed pyroelectricity probe.
4. 4. a kind of portable heavy caliber real time laser energy gauge as claimed in claim 1, it is characterised in that also include Heat dustbin, for discharging the redundant energy in pulse laser/continuous laser energy and space after spectroscope transmits.
5. A kind of 5. portable heavy caliber real time laser energy gauge as claimed in claim 1, it is characterised in that spectroscope Using the spectroscope that reflectivity is 5%~10%.
6. 6. a kind of portable heavy caliber real time laser energy gauge as described in any one of Claims 1 to 5, its feature exist In processing unit is tablet personal computer.
7. 7. a kind of portable heavy caliber real time laser energy measuring method, it is characterised in that comprise the following steps：

   (a) pulse laser that heavy calibers convergent lens projects remote laser range finder/continuous laser is assembled, and is incided point Light microscopic；

   (b) dichroic mirrors and transmitted pulse laser/continuous laser, and the pulse laser after reflection is incided into high speed heat and released Electric probe；By by step motor control thang-kng hole site, allowing and completely being passed through by the pulse laser of dichroic mirror；By spectroscope The continuous laser for inciding optical chopper is modulated to rectangular pulse laser, and the modulating frequency of control rectangle pulse laser；

   (c) energy number of the high speeds pyroelectricity probe measurement through the incident next rectangular pulse laser/pulse laser of optical chopper According to, and the energy datum measured is delivered to intelligent signal converter；

   (d) energy datum received is converted to software processing signal by intelligent signals converter, and is delivered to processing unit；

   (e) processing units receive and handled software processing signal, obtain the measurement knot of rectangular pulse laser/pulsed laser energy Fruit, or calculate to obtain the power of continuous laser according to modulating frequency and rectangular pulse laser energy.
8. 8. a kind of portable heavy caliber real time laser energy measuring method as claimed in claim 7, it is characterised in that using red The position of outer CCD monitoring rectangular pulses laser/representation of laser facula of the pulsed laser irradiation in high speed pyroelectricity probe, and will The representation of laser facula monitored is delivered to processing unit.
9. 9. a kind of portable heavy caliber real time laser energy measuring method as claimed in claim 7 or 8, it is characterised in that adopt Heat caused by high speed pyroelectricity probe is absorbed with heat sink device.
10. A kind of 10. laser power measurement system, it is characterised in that including

    Convergent lens, the continuous laser for laser range finder to be projected is assembled, and incides spectroscope；

    Spectroscope, optical chopper is incided for reflecting and transmiting continuous laser, and by the continuous laser after reflection；

    Optical chopper, by step motor control, the continuous laser for spectroscope to be incided to optical chopper is modulated to square Shape pulse laser, and the modulating frequency of control rectangle pulse laser；

    Pyroelectricity probe, for measuring the energy datum through the incident next pulse laser of optical chopper, and the energy that will be measured Data transfer is to intelligent signal converter；

    Intelligent signal converter, for the energy datum received to be converted into software processing signal, and it is delivered to processing unit；

    Processing unit, calculate and connected for receiving software processing signal, and according to modulating frequency and rectangular pulse laser energy The power of continuous laser.