CN210638810U - Laser beam parameter measuring device - Google Patents
Laser beam parameter measuring device Download PDFInfo
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- CN210638810U CN210638810U CN201920602749.1U CN201920602749U CN210638810U CN 210638810 U CN210638810 U CN 210638810U CN 201920602749 U CN201920602749 U CN 201920602749U CN 210638810 U CN210638810 U CN 210638810U
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Abstract
The utility model belongs to the technical field of laser detects, a laser beam parameter measurement device is disclosed, include: the device comprises an optical attenuation component, a focusing component, a beam splitting component, a beam analyzer, a cross reticle, a photoelectric detector and an oscilloscope; the optical attenuation component, the focusing component and the beam splitting component are sequentially arranged on a moving path of the laser beam to be detected; the beam analyzer is arranged on a light path of the reflected light of the beam splitting assembly; the cross reticle is arranged on a light path of the refracted light of the beam splitting component; the photoelectric detector is arranged on a light path of the diffuse reflection laser of the cross reticle and connected with the oscilloscope. The utility model provides a laser beam parameter measurement device can realize the simultaneous measurement to pulse laser range finder's laser pulse width, laser repetition frequency, facula energy homogeneity, optical axis uniformity isoparametric through one set of simple equipment and component, simplifies equipment scale and operating efficiency.
Description
Technical Field
The utility model relates to a laser range finder technical field, in particular to laser beam parameter measurement device.
Background
The beam parameters of the pulsed laser range finder are important parameters for evaluating the performance quality of the laser range finder. The method mainly comprises the following steps: laser wavelength, pulse energy, spot energy uniformity, beam spread angle, pulse width, pulse repetition frequency, and optical axis offset angle. Multiple devices and related operations are required to obtain the parameters, resulting in more complicated and less efficient measurement operations.
Aiming at the characteristic that the measurement of several parameters can share the light path, a multifunctional device capable of measuring the laser pulse width, the laser repetition frequency, the spot energy uniformity and the optical axis consistency is designed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a laser beam parameter measurement device, the required equipment of multiple beam parameter measurement who solves pulse laser range finder among the prior art is many, the complicated inefficient technical problem of operation.
In order to solve the technical problem, the utility model provides a laser beam parameter measuring device, include: the device comprises an optical attenuation component, a focusing component, a beam splitting component, a beam analyzer, a cross reticle, a photoelectric detector and an oscilloscope;
the optical attenuation component, the focusing component and the beam splitting component are sequentially arranged on a moving path of the laser beam to be detected;
the beam analyzer is arranged on a light path of the reflected light of the beam splitting assembly;
the cross reticle is arranged on a light path of the refracted light of the beam splitting component;
the photoelectric detector is arranged on a light path of the diffuse reflection laser of the cross reticle and connected with the oscilloscope.
Further, the optical attenuation module includes: an attenuation sheet.
Further, the focusing assembly includes: the reflective sheet is focused.
Further, the beam splitting assembly includes: a beam splitter.
Further, the measuring device further includes: an operating platform;
the optical attenuation component, the focusing component, the beam splitting component, the beam analyzer, the cross reticle, the photoelectric detector and the oscilloscope are respectively fixed on the operating platform.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the laser beam parameter measuring device provided by the embodiment of the application, the laser of the pulse laser range finder is attenuated, focused and split by the optical attenuation component, the focusing component and the beam splitting component, so that reflected light and refracted light are obtained; the beam analyzer receives the reflected light, reads the energy distribution of the light spot and measures the conformity of the Gaussian distribution of the energy of the light spot, thereby measuring the uniformity of the energy of the light spot; operating the cross center of the sighting telescope to align to the center of the cross reticle, marking a laser mark on the cross reticle, recording the offset h between the center position of the laser mark and the center of the reticle, and if the focal length of the focusing reflector is f, the optical axis offset angle is theta (arctan (h/f)); receiving diffuse reflection laser through a photoelectric detector, reading the full width at half maximum of a pulse through an oscilloscope, and measuring the pulse width of the laser; and measuring the time interval tau of two adjacent laser pulses by an oscilloscope, wherein the laser repetition frequency f is 1/tau. This application has realized measuring laser pulse width, laser repetition frequency, facula energy homogeneity, optical axis uniformity simultaneously under the prerequisite of setting up one set of optical measurement system, has improved measurement of efficiency.
Drawings
Fig. 1 is the structure schematic diagram of the laser beam parameter measuring device provided by the utility model.
Detailed Description
The embodiment of the application provides a laser beam parameter measuring device, and solves the technical problems that in the prior art, a pulse laser distance measuring instrument needs more equipment for measuring various laser beam parameters, and is complex in operation and low in efficiency.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the present disclosure, and it should be understood that the specific features in the embodiments and examples of the present disclosure are detailed descriptions of the technical solutions of the present disclosure, but not limitations of the technical solutions of the present disclosure, and the technical features in the embodiments and examples of the present disclosure may be combined with each other without conflict.
Referring to fig. 1, a laser beam parameter measuring apparatus includes: the device comprises an optical attenuation assembly 2, a focusing assembly 3, a beam splitting assembly 5, a beam analyzer 4, a cross reticle 6, a photoelectric detector 7 and an oscilloscope 8.
The optical attenuation component 2, the focusing component 3 and the beam splitting component 4 are sequentially arranged on a moving path of a laser beam to be detected; that is to say, the laser beam output by the pulsed laser range finder 1 is energy-attenuated by the optical attenuation component 2, so as to avoid high energy from damaging other elements; and then focused by the focusing assembly 3 and then split into a reflected beam and a refracted beam by the beam splitting assembly 5.
The beam analyzer is arranged on a light path of the reflected light of the beam splitting assembly; the reflected beam is received by the beam analyzer 4, and the spot energy distribution is read and the conformity of the gaussian distribution of the spot energy is measured, thereby obtaining the spot energy uniformity.
The cross reticle is arranged on a light path of the refracted light of the beam splitting component; the refracted light beams are projected onto the cross reticle 6, the theoretical light plate position and the actual light spot position are compared, an offset h is obtained, and an optical axis offset angle is obtained based on theta (arctan (h/f)) in combination with the focal length f of the focusing assembly 3.
The photoelectric detector is arranged on a light path of the diffuse reflection laser of the cross reticle and connected with the oscilloscope. The photoelectric detector 7 receives the diffuse reflection laser, reads the full width at half maximum of the pulse through the oscilloscope 8, and can measure the pulse width of the laser. The time interval τ between two adjacent laser pulses can also be measured by the oscilloscope 8, and the laser repetition frequency f is 1/τ.
In general, the optical attenuation module 2 comprises: an optical attenuation sheet; the polarizing plate may be a linear polarizing plate.
The focusing assembly 3 comprises: a focusing reflector plate; or a combination of a mirror and a focusing lens.
The beam splitting assembly 5 comprises: a beam splitter cube; it may be a plane beam splitter, or may be a beam splitter prism.
The measuring device further includes: an operating platform;
the optical attenuation component, the focusing component, the beam splitting component, the beam analyzer, the cross reticle, the photoelectric detector and the oscilloscope are respectively fixed on the operating platform, so that the position and angle adjustment of each component can be realized by a unified platform, and the reliability of adjustment is ensured.
Generally, to facilitate the angle adjustment, the optical attenuation sheet is further fixed on the operation platform through a first bracket. The first bracket includes: the device comprises a first base, a first support rod and a first clamp; the first end of the first supporting rod is rotatably fixed on the first base, and the first clamp is fixed at the second end of the first supporting rod.
Similarly, the focusing reflector plate is also provided with a second bracket, and the second bracket is fixed on the operating platform. The second bracket includes: the second base, the second supporting rod and the second clamp; the first end of the second supporting rod is rotatably fixed on the second base, and the second clamp is fixed at the second end of the second supporting rod.
The beam splitting assembly 5 is provided with a beam splitting mirror support which is fixed on the operating platform.
The cross reticle 6 is also provided with a third support, which is fixed on the operating platform. The third bracket includes: the third base, the third supporting rod and the third clamp; the first end of the third supporting rod is rotatably fixed on the third base, and the third clamp is fixed at the second end of the third supporting rod.
The embodiment of the utility model provides an in, still provide one kind and be used for carrying out the device measured to 1064nm wave band, 80mJ pulsed laser range finder's laser pulse width, laser repetition frequency, facula energy homogeneity, optical axis uniformity simultaneously.
The focal length of the focusing reflector of the attenuation sheet is 3m, the beam splitter adopts a Thorlabs BS044 beam splitting cube, the working wave band of the beam splitter is 700-1200 nm, the attenuation sheet adopts a Leidett 1064nm attenuation sheet, and the photoelectric detector adopts an InGaAs photoelectric detector. The attenuation sheet is close to the light outlet of the equipment as much as possible, the focusing reflector is placed at the position 1.5m in front of the equipment, the optical axis of the focusing reflector and the emergent optical axis of the equipment are placed in an inclined mode for 30 degrees, the distance between the beam splitter and the focusing reflector is 2.5m, and the distance between the cross reticle and the focusing reflector is 3 m. The device can realize the measurement of four parameters of laser pulse width, laser repetition frequency, facula energy uniformity and optical axis consistency.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
according to the laser beam parameter measuring device provided by the embodiment of the application, the laser of the pulse laser range finder is attenuated, focused and split by the optical attenuation component, the focusing component and the beam splitting component, so that reflected light and refracted light are obtained; the beam analyzer receives the reflected light, reads the energy distribution of the light spot and measures the conformity of the Gaussian distribution of the energy of the light spot, thereby measuring the uniformity of the energy of the light spot; operating the cross center of the sighting telescope to align to the center of the cross reticle, marking a laser mark on the cross reticle, recording the offset h between the center position of the laser mark and the center of the reticle, and if the focal length of the focusing reflector is f, the optical axis offset angle is theta (arctan (h/f)); receiving diffuse reflection laser through a photoelectric detector, reading the full width at half maximum of a pulse through an oscilloscope, and measuring the pulse width of the laser; and measuring the time interval tau of two adjacent laser pulses by an oscilloscope, wherein the laser repetition frequency f is 1/tau. This application has realized measuring laser pulse width, laser repetition frequency, facula energy homogeneity, optical axis uniformity simultaneously under the prerequisite of setting up one set of optical measurement system, has improved measurement of efficiency.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (5)
1. A laser beam parameter measuring device, comprising: the device comprises an optical attenuation component, a focusing component, a beam splitting component, a beam analyzer, a cross reticle, a photoelectric detector and an oscilloscope;
the optical attenuation component, the focusing component and the beam splitting component are sequentially arranged on a moving path of the laser beam to be detected;
the beam analyzer is arranged on a light path of the reflected light of the beam splitting assembly;
the cross reticle is arranged on a light path of the refracted light of the beam splitting component;
the photoelectric detector is arranged on a light path of the diffuse reflection laser of the cross reticle and connected with the oscilloscope.
2. The laser beam parameter measurement device of claim 1, wherein the optical attenuation module comprises: an attenuation sheet.
3. The laser beam parameter measuring device of claim 1, wherein the focusing assembly comprises: the reflective sheet is focused.
4. The laser beam parameter measurement device of claim 1, wherein the beam splitting assembly comprises: a beam splitter.
5. The laser beam parameter measuring device according to any one of claims 1 to 4, wherein the measuring device further comprises: an operating platform;
the optical attenuation component, the focusing component, the beam splitting component, the beam analyzer, the cross reticle, the photoelectric detector and the oscilloscope are respectively fixed on the operating platform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920602749.1U CN210638810U (en) | 2019-04-29 | 2019-04-29 | Laser beam parameter measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920602749.1U CN210638810U (en) | 2019-04-29 | 2019-04-29 | Laser beam parameter measuring device |
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| CN210638810U true CN210638810U (en) | 2020-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117889953A (en) * | 2024-01-09 | 2024-04-16 | 北京控制工程研究所 | Light beam illuminance uniformity testing device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117889953A (en) * | 2024-01-09 | 2024-04-16 | 北京控制工程研究所 | Light beam illuminance uniformity testing device and method |
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