CN111398937A - Optical performance adjusting device and optical performance adjusting method - Google Patents
Optical performance adjusting device and optical performance adjusting method Download PDFInfo
- Publication number
- CN111398937A CN111398937A CN202010264140.5A CN202010264140A CN111398937A CN 111398937 A CN111398937 A CN 111398937A CN 202010264140 A CN202010264140 A CN 202010264140A CN 111398937 A CN111398937 A CN 111398937A
- Authority
- CN
- China
- Prior art keywords
- optical
- collimator
- calibration
- assembly
- optical performance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Optical Distance (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses an optical performance adjusting device and an optical performance adjusting method, wherein the optical performance adjusting device comprises: the device comprises an optical platform, a collimator arranged on the optical platform, a diffuser plate arranged on the focal plane of the collimator plate, a shooting component used for shooting and identifying the diffuser plate, an upper computer electrically connected with the shooting component, a calibration component arranged on the optical platform and used for calibrating the collimator plate, and a rotating component arranged on the optical platform and located in the direction of the optical axis of the collimator plate; the scattering plate is provided with cross scale lines. The optical performance adjusting device can be used for adjusting once and simultaneously measuring the divergence angle and the pitching inclination angle of the laser radar, does not need a complex measuring process and complicated operation steps, greatly saves time, does not need a large calibration field, and can be used for completing assembly and measurement in a laboratory, so that the manufacturing cost of the laser radar is reduced, and the measuring precision is high.
Description
Technical Field
The invention relates to the field of optical detection, in particular to an optical performance adjusting device and an optical performance adjusting method.
Background
In the manufacturing process of the laser radar, the assembly and adjustment precision of an optical-mechanical part of the laser radar directly determines the yield of the laser radar; at present, the most important factor restricting the mass production of laser radar products is that the installation and adjustment period is too long, and the factors influencing the installation and adjustment period comprise the collimation of the light path of the transmitting end, the focusing of the receiving end, the optical axis parallelism of the transmitting end and the receiving end, the adjustment of the pitch inclination angle of the optical-mechanical module assembled on the whole machine, the measurement of the divergence angle of the laser radar and the like. The method needs a large experimental place, different devices are needed for different assembly and measurement, namely, the complete assembly and measurement are realized, the used experimental devices and tools are more in types, and meanwhile, the calibration field needs to be calibrated for a long distance before measurement, so that the calibration of manually moving the target surface and the calibration field is time-consuming, and the measurement precision is difficult to control.
Disclosure of Invention
Based on the above, the invention provides an optical performance adjusting device and an optical performance adjusting method, aiming at overcoming the defects that the laser radar divergence angle and pitching inclination angle testing method in the prior art needs a larger testing place, uses more testing equipment and tool types, is complicated to operate, wastes manpower, and is difficult to control the measurement accuracy.
The technical scheme is as follows:
an optical performance tuning device comprising: the device comprises an optical platform, a collimator arranged on the optical platform, a diffuser plate arranged on the focal plane of the collimator plate, a shooting component used for shooting and identifying the diffuser plate, an upper computer electrically connected with the shooting component, a calibration component arranged on the optical platform and used for calibrating the collimator plate, and a rotating component arranged on the optical platform and located in the direction of the optical axis of the collimator plate; the scattering plate is provided with cross scale lines.
The optical performance assembling and adjusting device of the technical scheme uses the collimator as a main instrument, and after the feasibility of optical performance test is verified by calibrating the collimator in advance, the measurement of the divergence angle and the pitching inclination angle of the laser radar can be completed simultaneously by one-time assembling and adjusting without complex measurement process and complicated operation steps, so that the time is greatly saved, a large calibration field is not needed, the assembling and the measurement can be completed in a laboratory, the manufacturing cost of the laser radar is reduced, and the measurement precision is high.
Specifically, at the initial set-up, the rotating assembly is not yet placed on the optical platform;
aligning the optical axis of the calibration component with the optical axis of the collimator, and reading the pitching deflection angle value of the calibration component;
if the pitching deflection angle value is 90 degrees, the collimator does not need to be adjusted;
if the pitching deflection angle value is not 90 degrees, firstly adjusting the calibration component to enable the pitching deflection angle value to be 90 degrees, and enabling the optical axis of the collimator to be superposed with the optical axis of the calibration component by adjusting the lifting and the integral inclination of the collimator;
moving the diffuser plate along the direction perpendicular to the optical axis of the collimator tube to enable the indicating light emitted by the calibration assembly to irradiate the center of the cross scale mark of the diffuser plate through the collimator tube;
moving the shooting assembly along the optical axis direction of the collimator so that the image of the scattering plate can be clearly observed on an upper computer;
calibrating the position relation between the pitch angle of the calibration assembly and the light spot on the scattering plate irradiated by the indicating light emitted by the calibration assembly;
verifying the feasibility of the optical performance test of the collimator through the relational expression of the position relation;
after the collimator is calibrated, withdrawing the calibration assembly from the optical platform, and arranging the rotating assembly on the optical platform and in the direction of the optical axis of the collimator;
placing a laser radar to be detected on the rotating assembly, and starting the laser radar;
observing laser beam spots emitted by the laser radar, and adjusting the pitching of an optical machine module in the laser radar to enable the laser beam spots emitted by the laser radar to be positioned on the vertical scale marks of the cross scale marks and to be symmetrical along the horizontal scale marks of the cross scale marks;
reading the length of the laser beam spot, and calculating the divergence angle of the laser radar;
after the rotating assembly is driven to rotate for a certain angle, the optical-mechanical module of the laser radar is shifted to rotate, and laser beam spots emitted by the optical-mechanical module are irradiated on the vertical scale marks of the cross scale marks;
shooting and recording the deviation condition of the laser beam light spot on the vertical scale mark by a shooting assembly;
repeating the steps, and recording the vertical position variation of the laser beam faculae under different rotation angles in 360-degree directions;
and judging whether the variation exceeds a tolerance range.
In one embodiment, the calibration assembly includes a lifting table disposed on the optical platform and located in the direction of the optical axis of the collimator, and a total station placed on the lifting table and aligned with the collimator.
In one embodiment, the camera assembly includes an industrial camera electrically connected to the upper unit and an industrial lens mounted on the industrial camera, the industrial lens being aligned with the diffuser plate.
In one embodiment, the diffuser plate is a light transmissive sheet.
In one embodiment, the cross-hair scale line has a minimum scale value of 0.5 mm.
In one embodiment, the rotating assembly includes a rotating platform disposed on the optical platform and a fixing tool connected to the rotating platform.
The technical scheme also provides an optical performance adjusting method, which comprises a calibration method, wherein the calibration method comprises the following steps:
aligning the optical axis of the calibration component with the optical axis of the collimator, and reading the pitching deflection angle value of the calibration component;
if the pitching deflection angle value is 90 degrees, the collimator does not need to be adjusted;
if the pitching deflection angle value is not 90 degrees, firstly adjusting the calibration component to enable the pitching deflection angle value to be 90 degrees, and enabling the optical axis of the collimator to be superposed with the optical axis of the calibration component by adjusting the lifting and the integral inclination of the collimator;
moving the diffuser plate along the direction perpendicular to the optical axis of the collimator tube to enable the indicating light emitted by the calibration assembly to irradiate the center of the cross scale mark of the diffuser plate through the collimator tube;
moving the shooting assembly along the optical axis direction of the collimator so that the image of the scattering plate can be clearly observed on an upper computer;
calibrating the position relation between the pitch angle of the calibration assembly and the light spot on the scattering plate irradiated by the indicating light emitted by the calibration assembly;
verifying the feasibility of the collimator for optical performance test;
and if the collimator is qualified, entering a next installation and adjustment procedure, otherwise, replacing the collimator until the collimator is qualified.
According to the optical performance assembling and adjusting method, the collimator is used as a main instrument, the collimator is calibrated in advance, after feasibility of optical performance testing is verified, measurement of the divergence angle and the pitching inclination angle of the laser radar can be completed at the same time through one-time assembling and adjusting, complex measurement processes and complicated operation steps are not needed, time is greatly saved, a large calibration field is not needed, assembling and measurement can be completed in a laboratory, manufacturing cost of the laser radar is reduced, and meanwhile measurement accuracy is high.
In one embodiment, calibrating the relationship between the pitch angle of the calibration assembly and the position of the light spot on the diffuser plate irradiated by the indicating light emitted by the calibration assembly comprises the following steps:
pitching and swinging the calibration assembly to enable the indicating light of the calibration assembly to irradiate each vertical scale on the scattering plate;
recording the corresponding angle value when the calibration component swings to the corresponding scale value each time;
and analyzing whether the angle value and the scale value satisfy a linear relation.
In one embodiment, the optical performance tuning method further comprises a testing method, and the testing method comprises the following steps:
1) placing a laser radar to be detected on the rotating assembly, and starting the laser radar;
2) observing laser beam spots emitted by the laser radar, and adjusting the pitching of an optical machine module in the laser radar to enable the laser beam spots emitted by the laser radar to be positioned on the vertical scale marks of the cross scale marks and to be symmetrical along the horizontal scale marks of the cross scale marks;
3) reading the length of the laser beam spot, and calculating the divergence angle of the laser radar;
4) after the rotating assembly is driven to rotate for a certain angle, the optical-mechanical module of the laser radar is shifted to rotate, and laser beam spots emitted by the optical-mechanical module are irradiated on the vertical scale marks of the cross scale marks;
5) shooting and recording the deviation condition of the laser beam light spot on the vertical scale mark by a shooting assembly;
6) repeating the step 4 and the step 5, and recording the vertical position variation of the laser beam faculae under different rotation angles in the 360-degree direction;
7) and judging whether the variation exceeds a tolerance range.
In one embodiment, the testing method further includes adjusting a light path of an optical-mechanical module of the laser radar:
adjusting the transmitting end of the optical machine part to enable the transmitting end to emit parallel light;
adjusting the receiving end of the optical-mechanical component to enable the detector of the optical-mechanical component to be positioned on the optimal focal plane of the receiving lens group;
and adjusting the parallelism of the transmitting end and the receiving end to ensure that laser beam spots emitted by the transmitting end are symmetrically positioned on the vertical scale marks of the cross scale marks and are symmetrical along the horizontal scale marks of the cross scale marks, so that the signal obtained by the detector of the receiving end is strongest.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of an optical performance adjusting device according to an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram of an optical performance tuning apparatus according to an embodiment of the present invention;
FIG. 3 is a first schematic diagram of a scattering plate and a laser beam spot according to an embodiment of the present invention;
FIG. 4 is a second schematic view of a scattering plate and laser beam spots according to an embodiment of the present invention;
FIG. 5 is a first schematic view of a diffuser plate and an indicator light according to an embodiment of the present invention;
fig. 6 is a second schematic view of the diffusion plate and the indicating light according to the embodiment of the invention.
Description of reference numerals:
10. an optical platform; 20. a collimator; 30. a diffuser plate; 31. cross scale lines; 311. vertical scale lines; 312. horizontal scale lines; 40. a shooting component; 50. an upper computer; 60. calibrating the component; 61. a lifting platform; 62. a total station; 70. a rotating assembly; 71. rotating the platform; 72. fixing the tool; 80. a laser radar.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
An optical performance tuning device as shown in fig. 1-2, comprising: the device comprises an optical platform 10, a collimator 20 arranged on the optical platform 10, a diffuser 30 arranged on a focal plane of the collimator 20, a shooting component 40 for shooting and identifying the diffuser 30, an upper computer 50 electrically connected with the shooting component 40, a calibration component 60 arranged on the optical platform 10 and used for calibrating the collimator 20, and a rotating component 70 arranged on the optical platform 10 and located in the direction of the optical axis of the collimator 20; the scattering plate 30 is provided with cross scale lines 31.
The optical performance assembling and adjusting device of the embodiment uses the collimator 20 as a main instrument, and after the feasibility of the optical performance test is verified by calibrating the collimator 20 in advance, the measurement of the divergence angle and the pitching inclination angle of the laser radar 80 can be completed at the same time through one-time assembling and adjusting, the complicated measurement process and the complicated operation steps are not needed, the time is greatly saved, a large calibration field is not needed, the assembly and the measurement can be completed in a laboratory, the manufacturing cost of the laser radar 80 is reduced, and meanwhile, the measurement precision is high.
The focal length of the collimator 20 in this embodiment is m-th order, which is used to improve the precision of the laser radar transmitting and receiving focusing.
Specifically, as shown in fig. 1, at the initial installation, the rotating assembly 70 is not yet placed on the optical platform 10, the collimator 20 is placed in the central region of the optical platform 10, and the diffuser plate 104 is placed at the back focal plane of the collimator 20;
aligning the optical axis of the calibration component 60 with the optical axis of the collimator 20, and reading the pitch deflection angle value of the calibration component 60;
if the pitch yaw angle value is 90 °, the collimator 20 does not need to be adjusted;
if the pitch deflection angle value is not 90 degrees, firstly adjusting the calibration component 60 to enable the pitch deflection angle value to be 90 degrees, and enabling the optical axis of the collimator 20 to be superposed with the optical axis of the calibration component 60 by adjusting the lifting and the integral inclination of the collimator 20;
moving the diffusion plate 30 in a direction perpendicular to the optical axis of the collimator 20 so that the indication light emitted from the calibration assembly 60 is irradiated onto the center of the cross-graduation mark 31 of the diffusion plate 30 through the collimator 20, as shown in fig. 5;
moving the shooting assembly 40 along the optical axis direction of the collimator 20, so that the image of the diffusion plate 30 can be clearly observed on an upper computer 50;
calibrating the pitch angle of the calibration assembly 60 and the position relation of light spots on the scattering plate 30 irradiated by the indicating light emitted by the calibration assembly 60;
and verifying the feasibility of the optical performance test of the collimator 20 through the relational expression of the position relation, entering the next step when the collimator 20 is qualified in calibration, and replacing the collimator 20 until the collimator is qualified in calibration if the collimator 20 is not qualified.
As shown in fig. 2, the collimator 20 is calibrated, the calibration assembly 60 is removed from the optical platform 10, and the rotating assembly 70 is disposed on the optical platform 10 in the direction of the optical axis of the collimator 20.
The laser radar 80 to be tested is placed on the rotating assembly 70 and the laser radar 80 is turned on.
As shown in fig. 3, the laser beam spots emitted by the laser radar 80 are observed, and the laser beam spots emitted by the laser radar are located on the vertical scale mark 311 of the cross scale mark 31 and are symmetrical along the horizontal scale mark 312 of the cross scale mark 31; if the laser beam spot is not symmetrical along the transverse scale line 312 of the cross scale line 31, and the center of the laser beam spot is above or below the transverse scale line 312, it is necessary to adjust the pitch of the opto-mechanical module in the laser radar 80 to make the laser beam spot symmetrical along the transverse scale line 312 of the cross scale line 31.
The length of the laser beam spot, namely the length of bb' in the figure, is read as the length of the laser beam spot, the length value is L1-L2, and the divergence angle α of the laser radar 80 is calculated according to the length of the laser beam spot, so that the value of the divergence angle α is obtained, wherein the divergence angle α is (L1-L2)/f, and f is the focal length of the collimator 20.
As shown in fig. 4, after the driving rotation assembly 70 rotates a certain angle, the optical-mechanical module of the laser radar 80 is shifted to rotate, and the laser beam spot emitted by the optical-mechanical module irradiates on the vertical scale line 311 of the cross scale line 31.
The shooting component 40 shoots and records the deviation condition of the laser beam spot on the vertical scale mark 311; the laser beam spot as in fig. 4 is located above the transverse graduation line 312 of the cross graduation line 31 by an offset amount of (H1+ H2)/2.
Repeating the steps, namely repeating the steps of rotating the rotating assembly 70 and rotating the optical machine module, and recording the vertical position variation of the laser beam facula under different rotation angles in the 360-degree direction; and the variable quantity is an assembly error in the laser radar, whether the variable quantity exceeds a tolerance range is judged, if the variable quantity exceeds the tolerance range, the pitching inclination angle error of the laser radar is large, the laser radar is unqualified, and therefore the assembly of the whole machine can be judged.
The calibration assembly 60 of the present embodiment includes a lifting table 61 disposed on the optical platform 10 and located in the optical axis direction of the collimator 20, and a total station 62 placed on the lifting table 61 and aligned with the collimator 20. The total station 62 comprises a telescopic lens, when the collimator 20 is calibrated, the total station 62 is adjusted to be horizontal, and the telescopic lens is aligned with the collimator 105 by the lifting of the lifting table 61 and the pitching and tilting of the telescopic lens of the total station 62, and simultaneously translating the lifting table 61 along the Guangzhou vertical direction of the collimator 20 and swinging the telescopic lens 62. Aligning the optical axis of the total station 62 with the optical axis of the collimator 20, reading the pitch and yaw angle value of the total station 62, and adjusting the elevation and the inclination of the collimator 20 according to the pitch and yaw angle value of the total station 62.
The shooting assembly 40 of the present embodiment comprises an industrial camera and an industrial lens mounted on the industrial camera, the industrial camera is electrically connected to the upper computer 50, and the industrial lens is aligned to the diffusion plate 30. The industrial lens adopts a low distortion lens with a limited conjugate distance, and the industrial camera adopts a camera which is matched with the industrial lens and can observe a broadband spectrum.
In the present embodiment, the diffusion plate 30 is a light-transmitting thin plate, and the diffusion plate 30 has high uniformity and high diffusion properties. Therefore, the laser radar 80 and the shooting component 40 can be respectively positioned at two opposite sides of the scattering plate 30, so that the shooting component 40 and the scattering plate 30 are arranged concentrically, the shooting precision is improved, and light spots on the scattering plate 30 can be shot clearly by the shooting component 40.
The minimum scale value of the cross scale mark 31 in this embodiment is 0.5mm, which is beneficial to improving the calibration precision of the collimator 20.
This embodiment rotating assembly 70 is including locating rotary platform 71 on optical platform 10 and with fixed frock 72 that rotary platform 71 is connected, fixed frock 72 is used for fixing laser radar, but rotary platform 71 then 360 degrees rotations of horizontal direction drive laser radar horizontal rotation.
The embodiment also provides an optical performance adjusting method, which includes a calibration method, and the calibration method includes the following steps:
aligning the optical axis of the calibration component 60 with the optical axis of the collimator 20, and reading the pitch deflection angle value of the calibration component 60;
if the pitch yaw angle value is 90 °, the collimator 20 does not need to be adjusted;
if the pitch deflection angle value is not 90 degrees, firstly adjusting the calibration component 60 to enable the pitch deflection angle value to be 90 degrees, and enabling the optical axis of the collimator 20 to be superposed with the optical axis of the calibration component 60 by adjusting the lifting and the integral inclination of the collimator 20;
moving the diffusion plate 30 in a direction perpendicular to the optical axis of the collimator 20 so that the indication light emitted from the calibration assembly 60 is irradiated onto the center of the cross-graduation mark 31 of the diffusion plate 30 through the collimator 20, as shown in fig. 5;
moving the shooting assembly 40 along the optical axis direction of the collimator 20, so that the image of the diffusion plate 30 can be clearly observed on an upper computer 50;
calibrating the pitch angle of the calibration assembly 60 and the position relation of light spots on the scattering plate 30 irradiated by the indicating light emitted by the calibration assembly 60;
and verifying the feasibility of the optical performance test of the collimator 20.
The optical performance assembling and adjusting method of the embodiment uses the collimator 20 as a main instrument, and after the feasibility of the optical performance test is verified by calibrating the collimator 20 in advance, the measurement of the divergence angle and the pitching inclination angle of the laser radar 80 can be completed at the same time through one-time assembling and adjusting, the complicated measurement process and the complicated operation steps are not needed, the time is greatly saved, a large calibration field is not needed, the assembling and the measurement can be completed in a laboratory, the manufacturing cost of the laser radar 80 is reduced, and the measurement precision is high.
The calibration of the relationship between the pitch angle of the calibration assembly 60 and the position of the light spot on the diffuser plate 30 irradiated by the indicating light emitted from the calibration assembly 60 in the present embodiment includes the following steps:
pitching the calibration assembly 60 so that the indication light of the calibration assembly 60 is irradiated on each vertical scale on the diffuser plate 30, as shown in fig. 6;
recording the corresponding angle value when the calibration component 60 swings to the corresponding scale value each time;
whether the angle value and the scale value meet the linear relation or not is analyzed, subsequent pitching inclination angle measurement data are determined according to the relation of the linear relation, the step is to verify the feasibility of the pitching inclination angle test of the collimator 20, batch assembly and measurement can be carried out after the step is completed, and the assembly and calibration of the step are carried out again only after the collimator 20 is moved.
The optical performance adjusting method also comprises a testing method, and the testing method comprises the following steps:
1) placing the laser radar 80 to be tested on the rotating assembly 70, and starting the laser radar 80;
2) as shown in fig. 3, the laser beam spots emitted by the laser radar 80 are observed, and the laser beam spots emitted by the laser radar 80 are located on the vertical scale lines 311 of the cross scale lines 31 and are symmetrical along the horizontal scale lines 312 of the cross scale lines 31 by adjusting the pitch of the optical module in the laser radar 80; if the laser beam spot is not symmetrical along the transverse scale line 312 of the cross scale line 31, and the center of the laser beam spot is above or below the transverse scale line 312, it is necessary to adjust the pitch of the opto-mechanical module in the laser radar 80 to make the laser beam spot symmetrical along the transverse scale line 312 of the cross scale line 31.
3) The length of the laser beam spot, namely the length of bb' in the figure, is read as the length of the laser beam spot, the length value is L1-L2, and the divergence angle α of the laser radar 80 is calculated according to the length of the laser beam spot, so that the value of the divergence angle α is obtained, wherein the divergence angle α is (L1-L2)/f, and f is the focal length of the collimator 20.
4) After the driving rotation assembly 70 rotates by a certain angle, the optical-mechanical module of the laser radar 80 is shifted to rotate, and laser beam spots emitted by the optical-mechanical module irradiate on the vertical scale lines 311 of the cross scale lines 31.
5) The shooting component 40 shoots and records the deviation condition of the laser beam spot on the vertical scale mark 311; the laser beam spot as in fig. 4 is located above the transverse graduation line 312 of the cross graduation line 31 by an offset amount of (H1+ H2)/2.
6) And (5) repeating the step 4 and the step 5, and recording the vertical position variation of the laser beam spots under different rotation angles in the 360-degree direction.
7) And the variable quantity is an assembly error in the laser radar, whether the variable quantity exceeds a tolerance range is judged, if the variable quantity exceeds the tolerance range, the pitching inclination angle error of the laser radar is large, the laser radar is unqualified, and therefore the assembly of the whole machine can be judged.
The test method in this embodiment further includes adjusting the optical path of the optical module of the laser radar 80:
adjusting the transmitting end of the optical machine part to enable the transmitting end to emit parallel light;
adjusting the receiving end of the optical-mechanical component to enable the detector of the optical-mechanical component to be positioned on the optimal focal plane of the receiving lens group; and adjusting the parallelism of the transmitting end and the receiving end to ensure that laser beam spots emitted by the transmitting end are symmetrically positioned on the vertical scale lines 311 of the cross scale lines 31 and are symmetrically positioned along the transverse scale lines 312 of the cross scale lines 31, so that the signal obtained by the detector of the receiving end is strongest.
In the embodiment, the signal amplitude of the receiving end is observed through the oscilloscope, and the parallelism of the receiving and transmitting optical axes and the focusing property of the receiving end are determined. In other embodiments, parallelism and focus may be determined using an industrial camera and an industrial lens for viewing a detector at the receiving end.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An optical performance tuning device, comprising: the device comprises an optical platform, a collimator arranged on the optical platform, a diffuser plate arranged on the focal plane of the collimator plate, a shooting component used for shooting and identifying the diffuser plate, an upper computer electrically connected with the shooting component, a calibration component arranged on the optical platform and used for calibrating the collimator plate, and a rotating component arranged on the optical platform and located in the direction of the optical axis of the collimator plate; the scattering plate is provided with cross scale lines.
2. The optical performance assembly of claim 1, wherein said indexing assembly comprises a stage mounted on said optical platform and oriented in the direction of the optical axis of said collimator, and a total station positioned on said stage and aligned with said collimator.
3. The optical performance assembly of claim 1 wherein the camera assembly comprises an industrial camera and an industrial lens mounted on the industrial camera, the industrial camera being electrically connected to the upper housing, the industrial lens being aligned with the diffuser plate.
4. The optical performance tuning device of claim 1, wherein the diffuser plate is a light transmissive sheet.
5. An optical performance tuning device according to claim 1, wherein the cross-hair scale has a minimum scale value of 0.5 mm.
6. The optical performance tuning device of claim 1, wherein the rotation assembly comprises a rotation platform disposed on the optical platform and a fixture connected to the rotation platform.
7. An optical performance adjusting method is characterized by comprising a calibration method, wherein the calibration method comprises the following steps:
aligning the optical axis of the calibration component with the optical axis of the collimator, and reading the pitching deflection angle value of the calibration component;
if the pitching deflection angle value is 90 degrees, the collimator does not need to be adjusted;
if the pitching deflection angle value is not 90 degrees, firstly adjusting the calibration component to enable the pitching deflection angle value to be 90 degrees, and enabling the optical axis of the collimator to be superposed with the optical axis of the calibration component by adjusting the lifting and the integral inclination of the collimator;
moving the diffuser plate along the direction perpendicular to the optical axis of the collimator tube to enable the indicating light emitted by the calibration assembly to irradiate the center of the cross scale mark of the diffuser plate through the collimator tube;
moving the shooting assembly along the optical axis direction of the collimator so that the image of the scattering plate can be clearly observed on an upper computer;
calibrating the position relation between the pitch angle of the calibration assembly and the light spot on the scattering plate irradiated by the indicating light emitted by the calibration assembly;
verifying the feasibility of the collimator for optical performance test;
and if the collimator is qualified, entering a next installation and adjustment procedure, otherwise, replacing the collimator until the collimator is qualified.
8. The optical performance adjusting method according to claim 7, wherein calibrating the relationship between the pitch angle of the calibration assembly and the position of the spot of the indication light emitted by the calibration assembly and irradiated on the diffuser plate comprises the following steps:
pitching and swinging the calibration assembly to enable the indicating light of the calibration assembly to irradiate each vertical scale on the scattering plate;
recording the corresponding angle value when the calibration component swings to the corresponding scale value each time;
and analyzing whether the angle value and the scale value satisfy a linear relation.
9. The optical performance tuning method of claim 7, further comprising a testing method, the testing method comprising the steps of:
1) placing a laser radar to be detected on the rotating assembly, and starting the laser radar;
2) observing laser beam spots emitted by the laser radar, and adjusting the pitching of an optical machine module in the laser radar to enable the laser beam spots emitted by the laser radar to be positioned on the vertical scale marks of the cross scale marks and to be symmetrical along the horizontal scale marks of the cross scale marks;
3) reading the length of the laser beam spot, and calculating the divergence angle of the laser radar;
4) after the rotating assembly is driven to rotate for a certain angle, the optical-mechanical module of the laser radar is shifted to rotate, and laser beam spots emitted by the optical-mechanical module are irradiated on the vertical scale marks of the cross scale marks;
5) shooting and recording the deviation condition of the laser beam light spot on the vertical scale mark by a shooting assembly;
6) repeating the step 4 and the step 5, and recording the vertical position variation of the laser beam faculae under different rotation angles in the 360-degree direction;
7) and judging whether the variation exceeds a tolerance range.
10. The optical performance tuning method of claim 9, wherein the testing method further comprises adjusting an optical path of an opto-mechanical module of the lidar:
adjusting the transmitting end of the optical machine part to enable the transmitting end to emit parallel light;
adjusting the receiving end of the optical-mechanical component to enable the detector of the optical-mechanical component to be positioned on the optimal focal plane of the receiving lens group;
and adjusting the parallelism of the transmitting end and the receiving end to ensure that laser beam spots emitted by the transmitting end are symmetrically positioned on the vertical scale marks of the cross scale marks and are symmetrical along the horizontal scale marks of the cross scale marks, so that the signal obtained by the detector of the receiving end is strongest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264140.5A CN111398937B (en) | 2020-04-07 | 2020-04-07 | Optical performance adjusting device and optical performance adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264140.5A CN111398937B (en) | 2020-04-07 | 2020-04-07 | Optical performance adjusting device and optical performance adjusting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111398937A true CN111398937A (en) | 2020-07-10 |
| CN111398937B CN111398937B (en) | 2022-02-08 |
Family
ID=71431480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010264140.5A Active CN111398937B (en) | 2020-04-07 | 2020-04-07 | Optical performance adjusting device and optical performance adjusting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111398937B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982467A (en) * | 2020-07-17 | 2020-11-24 | 中国科学院西安光学精密机械研究所 | Device and method for aligning optical axis of collimator and optical axis of optical-mechanical system in stray light test |
| CN112925106A (en) * | 2021-01-26 | 2021-06-08 | 中国科学院西安光学精密机械研究所 | Laser optical axis visualization device and system and optical axis docking method |
| CN113030921A (en) * | 2021-03-30 | 2021-06-25 | 森思泰克河北科技有限公司 | Multi-line laser radar optical machine adjusting device and detection method of rotating mirror module |
| CN113759350A (en) * | 2021-09-29 | 2021-12-07 | 宁波未感半导体科技有限公司 | Laser radar debugging device and method |
| CN114413758A (en) * | 2022-01-24 | 2022-04-29 | 中国工程物理研究院机械制造工艺研究所 | Laser transmission positioning accuracy detection assembly |
| WO2023004792A1 (en) * | 2021-07-30 | 2023-02-02 | 深圳市速腾聚创科技有限公司 | Laser radar attitude calibration method and related apparatus, and storage medium |
| CN116719017A (en) * | 2023-08-09 | 2023-09-08 | 深圳玩智商科技有限公司 | Laser radar multi-reflectivity multi-distance calibration tool |
| CN117590361A (en) * | 2024-01-18 | 2024-02-23 | 深圳北醒科技有限公司 | Optical axis center testing method |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2189309Y (en) * | 1994-03-15 | 1995-02-08 | 高景龙 | Multi-function laser measuring instrument |
| CN101086530A (en) * | 2007-07-04 | 2007-12-12 | 中国航空工业第一集团公司第六一三研究所 | 1.064um laser range finder transmitting antenna debugging method and apparatus |
| CN101551451A (en) * | 2008-04-03 | 2009-10-07 | 南京理工大学 | Adjustment and installation device for optical antenna of semiconductor laser range instrument |
| CN101852677A (en) * | 2010-05-24 | 2010-10-06 | 中国科学院长春光学精密机械与物理研究所 | Method for improving focal distance detection precision of long focal distance collimator |
| CN103645471A (en) * | 2013-12-20 | 2014-03-19 | 中国科学院合肥物质科学研究院 | Laser radar detecting light source divergence angle measuring device and method |
| CN103869595A (en) * | 2014-02-24 | 2014-06-18 | 北京空间机电研究所 | Focal plane adjustment method for off-axis three-lens camera |
| CN105137415A (en) * | 2015-05-25 | 2015-12-09 | 北京空间机电研究所 | Device and method for laser rangefinder receiving field-of-view calibration and optical axis parallelism measurement |
| CN105338233A (en) * | 2015-12-04 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | Camera assembling adjusting and calibrating method |
| US20160209500A1 (en) * | 2012-12-21 | 2016-07-21 | Leica Geosystems Ag | Self-calibrating laser tracker and self-calibration method |
| CN206161023U (en) * | 2016-11-16 | 2017-05-10 | 孝感华中精密仪器有限公司 | Novel range finding gun sight optical axis rectifier |
| CN107833254A (en) * | 2017-10-11 | 2018-03-23 | 中国长光卫星技术有限公司 | A kind of camera calibration device based on diffraction optical element |
| CN107884763A (en) * | 2017-10-11 | 2018-04-06 | 北京空间机电研究所 | A kind of optical axis Calibration Method and device |
| CN207423494U (en) * | 2017-09-21 | 2018-05-29 | 中国科学院西安光学精密机械研究所 | Laser communication terminal vacuum test system |
| CN207557468U (en) * | 2017-11-14 | 2018-06-29 | 上海宇航系统工程研究所 | A kind of three-dimensional laser radar system for having high-precision calibrating function |
| CN108956099A (en) * | 2018-07-21 | 2018-12-07 | 胡林亭 | The method of two transits measurement multiband system optical axis consistency |
| CN110146259A (en) * | 2019-06-18 | 2019-08-20 | 四川长九光电科技有限责任公司 | A kind of reflective multi-light axis consistency quantitative test of large-caliber off-axis and calibrating installation |
| CN110297230A (en) * | 2019-07-15 | 2019-10-01 | 北京理工大学 | Satellite-bone laser radar Echo Signal Simulator |
| CN110515059A (en) * | 2019-07-26 | 2019-11-29 | 上海卫星装备研究所 | Lidar transmit-receive optical axis matches system safety testing device under vacuum and low temperature |
| CN110850390A (en) * | 2019-11-26 | 2020-02-28 | 广东博智林机器人有限公司 | Optical collimating device and laser radar |
-
2020
- 2020-04-07 CN CN202010264140.5A patent/CN111398937B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2189309Y (en) * | 1994-03-15 | 1995-02-08 | 高景龙 | Multi-function laser measuring instrument |
| CN101086530A (en) * | 2007-07-04 | 2007-12-12 | 中国航空工业第一集团公司第六一三研究所 | 1.064um laser range finder transmitting antenna debugging method and apparatus |
| CN101551451A (en) * | 2008-04-03 | 2009-10-07 | 南京理工大学 | Adjustment and installation device for optical antenna of semiconductor laser range instrument |
| CN101852677A (en) * | 2010-05-24 | 2010-10-06 | 中国科学院长春光学精密机械与物理研究所 | Method for improving focal distance detection precision of long focal distance collimator |
| US20160209500A1 (en) * | 2012-12-21 | 2016-07-21 | Leica Geosystems Ag | Self-calibrating laser tracker and self-calibration method |
| CN103645471A (en) * | 2013-12-20 | 2014-03-19 | 中国科学院合肥物质科学研究院 | Laser radar detecting light source divergence angle measuring device and method |
| CN103869595A (en) * | 2014-02-24 | 2014-06-18 | 北京空间机电研究所 | Focal plane adjustment method for off-axis three-lens camera |
| CN105137415A (en) * | 2015-05-25 | 2015-12-09 | 北京空间机电研究所 | Device and method for laser rangefinder receiving field-of-view calibration and optical axis parallelism measurement |
| CN105338233A (en) * | 2015-12-04 | 2016-02-17 | 中国航空工业集团公司洛阳电光设备研究所 | Camera assembling adjusting and calibrating method |
| CN206161023U (en) * | 2016-11-16 | 2017-05-10 | 孝感华中精密仪器有限公司 | Novel range finding gun sight optical axis rectifier |
| CN207423494U (en) * | 2017-09-21 | 2018-05-29 | 中国科学院西安光学精密机械研究所 | Laser communication terminal vacuum test system |
| CN107884763A (en) * | 2017-10-11 | 2018-04-06 | 北京空间机电研究所 | A kind of optical axis Calibration Method and device |
| CN107833254A (en) * | 2017-10-11 | 2018-03-23 | 中国长光卫星技术有限公司 | A kind of camera calibration device based on diffraction optical element |
| CN207557468U (en) * | 2017-11-14 | 2018-06-29 | 上海宇航系统工程研究所 | A kind of three-dimensional laser radar system for having high-precision calibrating function |
| CN108956099A (en) * | 2018-07-21 | 2018-12-07 | 胡林亭 | The method of two transits measurement multiband system optical axis consistency |
| CN110146259A (en) * | 2019-06-18 | 2019-08-20 | 四川长九光电科技有限责任公司 | A kind of reflective multi-light axis consistency quantitative test of large-caliber off-axis and calibrating installation |
| CN110297230A (en) * | 2019-07-15 | 2019-10-01 | 北京理工大学 | Satellite-bone laser radar Echo Signal Simulator |
| CN110515059A (en) * | 2019-07-26 | 2019-11-29 | 上海卫星装备研究所 | Lidar transmit-receive optical axis matches system safety testing device under vacuum and low temperature |
| CN110850390A (en) * | 2019-11-26 | 2020-02-28 | 广东博智林机器人有限公司 | Optical collimating device and laser radar |
Non-Patent Citations (5)
| Title |
|---|
| LI X;等: "Design of the Real-Time Autofocusing System for Collimator with Long Focus Length and Large Aperture[", 《APPLIED MECHANICS & MATERIALS》 * |
| WANG, ZH ；等: "New method of CCD camera calibration based on collimator", 《JOURNAL OF INFRARED AND MILLIMETER WAVES》 * |
| 刘磊: "机载LIDAR系统误差分析与检校方法研究", 《万方数据库》 * |
| 李璟；等: "星敏感器光学系统的研制与性能测试", 《光学学报》 * |
| 赵媛媛；等: "基于单CCD相机的高精瞄具纯粹零位走动测量方法研究", 《长春理工大学学报（自然科学版）》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982467B (en) * | 2020-07-17 | 2021-07-27 | 中国科学院西安光学精密机械研究所 | Device and method for aligning optical axis of collimator and optical axis of optical-mechanical system in stray light test |
| CN111982467A (en) * | 2020-07-17 | 2020-11-24 | 中国科学院西安光学精密机械研究所 | Device and method for aligning optical axis of collimator and optical axis of optical-mechanical system in stray light test |
| CN112925106A (en) * | 2021-01-26 | 2021-06-08 | 中国科学院西安光学精密机械研究所 | Laser optical axis visualization device and system and optical axis docking method |
| CN113030921B (en) * | 2021-03-30 | 2022-07-29 | 森思泰克河北科技有限公司 | Multi-line laser radar optical machine adjusting device and detection method of rotating mirror module |
| CN113030921A (en) * | 2021-03-30 | 2021-06-25 | 森思泰克河北科技有限公司 | Multi-line laser radar optical machine adjusting device and detection method of rotating mirror module |
| WO2023004792A1 (en) * | 2021-07-30 | 2023-02-02 | 深圳市速腾聚创科技有限公司 | Laser radar attitude calibration method and related apparatus, and storage medium |
| CN113759350A (en) * | 2021-09-29 | 2021-12-07 | 宁波未感半导体科技有限公司 | Laser radar debugging device and method |
| CN113759350B (en) * | 2021-09-29 | 2023-10-27 | 宁波未感半导体科技有限公司 | Laser radar debugging device and debugging method |
| CN114413758A (en) * | 2022-01-24 | 2022-04-29 | 中国工程物理研究院机械制造工艺研究所 | Laser transmission positioning accuracy detection assembly |
| CN116719017A (en) * | 2023-08-09 | 2023-09-08 | 深圳玩智商科技有限公司 | Laser radar multi-reflectivity multi-distance calibration tool |
| CN116719017B (en) * | 2023-08-09 | 2023-11-10 | 深圳玩智商科技有限公司 | Laser radar multi-reflectivity multi-distance calibration tool |
| CN117590361A (en) * | 2024-01-18 | 2024-02-23 | 深圳北醒科技有限公司 | Optical axis center testing method |
| CN117590361B (en) * | 2024-01-18 | 2024-04-30 | 深圳北醒科技有限公司 | Optical axis center testing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111398937B (en) | 2022-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111398937B (en) | Optical performance adjusting device and optical performance adjusting method | |
| CN1687702A (en) | 2D photoelectric auto collimation equipment and measuring method based on dynamic differential compensation process | |
| KR20100131945A (en) | Eccentricity adjusting and assembling method, and eccentricity adjusting and assembling device of optical element | |
| CN112817160B (en) | Method for assembling and adjusting optical imaging system | |
| CN106441371B (en) | Special verification/calibration device for digital level | |
| CN111707450B (en) | Device and method for detecting position relation between optical lens focal plane and mechanical mounting surface | |
| CN101261119B (en) | Light beam parallelism and collimating fault checking method | |
| CN111426449A (en) | Method for calibrating parallelism of optical axes of multiple autocollimators | |
| CN112532969B (en) | Adjustable focal plane assembly position calibration method for collimator | |
| CN109974977B (en) | Objective lens distortion detection method and device | |
| CN115096219A (en) | Detection device for transparent ceramic plate splicing flatness and semi-quantitative test method | |
| JP6920024B2 (en) | Board inspection device, inspection jig, and its board inspection method | |
| CN117590361B (en) | Optical axis center testing method | |
| CN220104459U (en) | Optical lens centering and positioning device based on multi-focus annular lens | |
| CN214907117U (en) | CT imaging system for correcting axial mechanical vibration error of rotary table by laser range finder | |
| CN109269441A (en) | A kind of error detection method of segmental support system geometrical performance | |
| CN220752377U (en) | Lens base adjusting device | |
| KR102673567B1 (en) | An X-ray Inspecting Method Based on a Multi Calibration of Focuses | |
| CN114894712B (en) | Optical measuring equipment and correction method thereof | |
| CN117213807B (en) | Double-tube angle measuring device and angle measuring method of beam splitting prism | |
| CN215065171U (en) | Testing device | |
| US20230054161A1 (en) | Device and method for measuring curvature radius | |
| CN113776557B (en) | Theodolite horizontal direction one-measuring-back precision testing system | |
| CN113587854B (en) | Naked eye 3D grating film angle detection system and detection method | |
| CN113624257B (en) | Method for testing horizontal one-measurement-back precision of theodolite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |