CN210346907U - Light beam measuring device - Google Patents
Light beam measuring device Download PDFInfo
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- CN210346907U CN210346907U CN201921375052.1U CN201921375052U CN210346907U CN 210346907 U CN210346907 U CN 210346907U CN 201921375052 U CN201921375052 U CN 201921375052U CN 210346907 U CN210346907 U CN 210346907U
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Abstract
The utility model discloses a light beam measuring device, which comprises a light source to be measured; the first imaging component is an area array detector and directly receives light rays within a certain emergent angle of the light source to be detected; the first imaging assembly is arranged on the movable support, wherein the first imaging assembly moves in a two-dimensional plane under the control of the movable support. The utility model discloses a light beam measuring device, through the light in the certain exit angle of direct receiving light source that awaits measuring, not only can measure the light structure of light source, the homogeneity, light intensity distribution, can also measure the light intensity and the exit angle of the light in each exit angle in the light source that awaits measuring, form facula border outdiffusion when also having avoided using even light membrane among the prior art and leading to light to project even light membrane simultaneously, and lead to the problem that measuring result received the influence, the beneficial effect who is showing has.
Description
Technical Field
The utility model relates to a photoelectric test field, concretely relates to light beam measuring device.
Background
The light of the 3D structured light has certain structural characteristics, is generally distributed in a dot, line or grid manner, is projected to the surface of a measured object and then is collected by an infrared camera to obtain the three-dimensional structural information of the measured object, so that the 3D structured light is more and more widely applied in the fields of biological recognition, machine vision and the like. The structured light source is an important component for realizing the function of the structured light source, and the evaluation and analysis of the radiation power, the spectrum and the light beam quality of the light source are very important for the application effect of the structured light source, and are directly related to the identification and the identification accuracy.
For matrix light measurement, one or two sets of devices are generally required to measure the power and spectrum of the matrix light measurement, and the other set of devices is required to measure the beam quality. In addition, for the measurement of the light beam quality, the light beam is mainly projected onto the light homogenizing film, and the structure of the projected light beam and the light spot intensity distribution information are obtained by imaging the light homogenizing film, so that the light spot size is measured. However, after the laser is incident into the light homogenizing film, the laser is transversely scattered in the light homogenizing film, so that light spots are deformed, and a large error is caused in the measurement of the size of the light spots.
In summary, the prior art has a single measurement function for the 3D structured light source, and if multiple types of test data need to be obtained, the corresponding equipment is also complex; and the test process is easily influenced by the light homogenizing film to generate larger errors, so that the measurement result is influenced. In order to better improve the measurement efficiency and measurement accuracy of the 3D structured light source, the above technical problems need to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a light beam measuring device aims at solving prior art and can't once only measure structure light spectrum and beam characteristic to and measure the technical problem that matrix light received the influence of throwing even light film.
The utility model discloses a light beam measuring device, which comprises a light source to be measured; the first imaging component is an area array detector and directly receives light rays within a certain emergent angle from a light source to be detected; the first imaging assembly is arranged on the movable support, wherein the first imaging assembly moves in a two-dimensional plane under the control of the movable support. The utility model discloses a set up the single light of first imaging component direct receiving light source that awaits measuring to first imaging component accessible movable support removes a plurality of light in receiving the light source beam that awaits measuring one by one in the two-dimensional plane. Not only can measure the light source light line structure that awaits measuring, homogeneity, light intensity distribution, can also measure the light intensity and the outgoing angle of each light in the beam, also avoided using even membrane and lead to laser facula boundary diffusion among the prior art simultaneously, and lead to the problem that measuring result received the influence.
It should be noted that, when the emergent light ray within a certain angle mentioned in this document is directly incident to the first imaging component, the projection pattern may be a circular or linear spot, or other specific shape.
In some alternative embodiments, a projection screen and a second imaging assembly are also included. The projection screen is arranged on the light emergent surface of the light source to be measured, and the second imaging component receives the light source reflected from the projection screen. And measuring the light structure, the integral uniformity and the distribution condition of the light source to be measured.
In some optional implementations, the second imaging component is disposed near the light source under test.
Optionally, the light source to be measured and the second imaging device are symmetrically arranged with the central normal of the projection screen as a symmetry axis. The symmetrical arrangement mode can avoid the emergent light from influencing the receiving of the second imaging device, and avoid the error of the measuring result. The smaller the included angle between the light source to be measured and the second imaging device is, the smaller the imaging distortion is.
In some alternative embodiments, the second imaging assembly includes an optical imaging element and an area array detector. The light source to be measured images on the light incident surface of the area array detector through the optical imaging element, so that the overall characteristics of the light source to be measured, including the characteristics of light beam size, light ray structure, uniformity and the like, are measured. Optionally, the optical imaging element is a lens, but is not limited thereto.
In some alternative embodiments, the projection screen is a neutral diffuse reflecting screen.
Alternatively, the projection screen may be cut in and out of the optical path of the light source to be measured. When the whole body of the light source to be measured is subjected to optical characteristic measurement, the projection screen is cut in; the projection screen is cut out when measuring each light ray in the light source to be measured.
In the measurement process, the preferable step is to firstly use the projection screen and the second imaging component to measure the whole of the light source to be measured, so as to obtain the whole coverage range and boundary of a plurality of light spots of the light source to be measured on the projection screen or nearby positions and the distribution condition of the light spots formed by each light ray; the projection screen is then moved out of the screen and the light is collected with the first imaging assembly within the previously determined range and boundaries. The process can greatly improve the measurement efficiency and accuracy.
In some optional embodiments, the optical spectrum measuring device further comprises a spectrum measuring assembly, wherein the spectrum measuring assembly is arranged on the movable support. The spectral measurement device and the first imaging component move on a two-dimensional plane under the control of the movable support, and spectral characteristic measurement is carried out on light rays within a certain emergent angle of the light source to be measured, so that a measurement result of spatial spectral distribution is obtained.
In some optional embodiments, the power measuring device further comprises a power measuring component arranged on the movable bracket. The power measurement assembly is used for measuring the power of the light source to be measured. Moreover, when the power of the light in a certain exit angle is known, the first imaging assembly and the spectral measurement device are used for measuring the light in the exit angle to respectively obtain corresponding characteristic values, and corresponding correction coefficients can be respectively obtained by converting the power value and a series of characteristic values, so that the aim of correcting the absolute values of the first imaging assembly and the spectral measurement device is fulfilled.
In some optional embodiments, a light attenuation element is further disposed in front of the first imaging assembly. The light attenuation element can prevent the sensor element in the first imaging assembly from being damaged when the intensity of the light source to be measured is too high.
In some optional embodiments, the optical measurement device further includes an optical filter, and the optical filter is disposed in an optical path between the light source to be measured and the first imaging component and/or an optical path between the light source to be measured and the second imaging component. The filter is arranged to filter out stray light except for non-target common sections. The utility model discloses a do not do the injecing to the concrete position that sets up of light filter, can adjust according to the measurement demand.
Preferably, the optical filter is disposed outside the first imaging module or the second imaging module, so that different optical filters can be replaced according to the selection of different measurement objects.
In some optional embodiments, the movable support comprises a guide rail and a slide block moving along the guide rail, and the first imaging assembly is mounted on the slide block.
Optionally, the first imaging assembly and/or the spectral measuring device and/or the power measuring device are mounted on the movable support through a slider, and the light rays within each exit angle of the light source to be measured are received in the two-dimensional plane through the movement of the slider in the guide rail.
Optionally, the first imaging component, the spectrum measuring device and the power measuring component can be sequentially switched into the light path of the light source to be measured through the movement of the sliding block.
In some optional embodiments, the light source to be measured is mounted on a light source bracket, and the light source bracket includes a rotating device capable of driving the light source to be measured to rotate. Through setting up the light source support, the flexibility and the controllability that can increase the light source and remove to adapt to different test demands.
In some optional embodiments, the light source to be measured is a laser light source. The laser light source is typically structured light and may be distributed in dots, lines or grids. The first imaging component is used for sequentially measuring the light intensity of the laser light in each emergent angle of the laser light source, and the spectral measurement component is used for analyzing the spectral characteristics of the laser light in each emergent angle; and measuring the power of the laser light rays in each emergent angle through the power measuring assembly, and correcting the absolute values of the first imaging assembly and the spectrum measuring assembly.
The utility model discloses a light beam measuring device, through the light in the certain exit angle of direct receiving light source that awaits measuring, not only can measure the light structure of light source, the homogeneity, light intensity distribution, can also measure the light intensity and the exit angle of the light in each exit angle in the light source that awaits measuring, form facula border outdiffusion when also having avoided using even light membrane among the prior art and leading to light to project even light membrane simultaneously, and lead to the problem that measuring result received the influence, the beneficial effect who is showing has.
Drawings
Fig. 1 is a schematic structural diagram of a light beam measuring device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another light beam measuring device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another light beam measuring device according to an embodiment of the present invention;
1-a light source to be measured; 10-light; 2-a first imaging assembly; 3-a movable support; 4-a spectral measuring device; 5-a second imaging assembly; 6-projection screen; 7-a power measurement component; 8-light source support.
Detailed Description
Example 1
The utility model provides an embodiment of a light beam measuring device, as shown in fig. 1, comprising a light source 1 to be measured, wherein the light source 1 to be measured comprises a plurality of light rays 10; the first imaging component 2, the first imaging component 2 is an area array detector, and directly receives the single light 10 from the light source 1 to be measured; the movable support 3, the relative light source 1 that awaits measuring of movable support 3 sets up, and first imaging component 2 sets up on movable support 3, and wherein, first imaging component 2 removes in the two-dimensional plane under movable support 3's control. The device also comprises a spectrum measuring component 4, wherein the spectrum measuring component 4 is arranged on the movable bracket 3; a power measuring assembly 7 is also included for power measurement of each ray 10 of the light source 1 being measured. The first imaging assembly 2 is an area array detector, and a light attenuation element (not shown) is arranged in front of the first imaging assembly 2; the device also comprises an optical filter (not shown) which is arranged in the light path of the light source to be detected and the first imaging component.
Example 2
The utility model provides an embodiment of a light beam measuring device, as shown in fig. 1, fig. 2 and fig. 3, comprising a light source 1 to be measured, wherein the light source 1 to be measured comprises a plurality of light rays 10; the light source to be detected 1 is arranged on the light source bracket 8, and the light source bracket 8 comprises a rotating device which can drive the light source to be detected to rotate; the first imaging component 2, the first imaging component 2 is an area array detector, and directly receives the single light 10; the movable support 3 is arranged opposite to the light source 1 to be measured, and the movable support further comprises a guide rail (not shown) and a sliding block (not shown) moving along the guide rail. Comprises a spectral measurement assembly 4; and the power measuring component 7 is used for measuring the power of the single light ray 10. The first imaging component 2, the spectral measurement component 4 and the power measurement component 7 are arranged on the movable support 3 through a sliding block, move in a two-dimensional plane through the sliding block, and can be controlled to sequentially cut into light paths of all light rays of the light source to be measured through the sliding block. The first imaging component (2) is an area array detector; the optical filter is arranged in a light path between the light source to be detected and the first imaging component and a light path between the light source to be detected and the second imaging component (not shown). And further comprises a projection screen 6 and a second imaging assembly 5 arranged near the light source 1 to be measured. The second imaging assembly 5 includes an optical imaging element and an area array detector.
When the array distribution and uniformity of the light source 1 to be measured are measured integrally, the projection screen 6 is cut into the test area. The projection screen 6 is disposed on the light emitting surface of the light source 1 to be measured, and the second imaging assembly 5 receives the light source to be measured reflected from the projection screen. Measuring the integral uniformity and distribution condition of the light 10 distributed in the array in the light source to be measured; when the performance measurement such as light intensity, spectral power and the like is carried out on each light ray in the light source 1 to be measured, the projection screen 6 is cut out.
The light source 1 to be measured and the second imaging device 5 are symmetrically arranged by taking the central normal of the projection screen 6 as a symmetry axis. The symmetrical arrangement mode can avoid the emergent light from influencing the receiving of the second imaging device, and avoid the error of the measuring result. In this embodiment, the light source 1 to be measured enters the projection screen 6 at an angle θ from the center normal of the projection screen, and the second imaging device 5 receives the reflected light from the projection screen 6.
While the present invention has been described with reference to the embodiments, it will be understood by those skilled in the art that the above embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of protection of the invention is defined by the appended claims.
Claims (10)
1. A light beam measuring apparatus, comprising
A light source (1) to be measured; the device comprises a first imaging assembly (2), a second imaging assembly and a third imaging assembly, wherein the first imaging assembly (2) is an area array detector and directly receives light rays (10) within a certain emergent angle of a light source (1) to be detected;
the movable support (3), the movable support (3) sets up relatively light source (1) that awaits measuring, first imaging component set up in on the movable support (3), wherein, first imaging component (2) are in the control of movable support (3) is removed in the two-dimensional plane.
2. The light beam measuring device according to claim 1, further comprising a projection screen (6) and a second imaging assembly (5), wherein the light beam of the light source under test is incident on the projection screen (6), and the second imaging assembly (5) measures the image of the light source under test (1) on the projection screen (6).
3. The beam measuring apparatus according to claim 2, wherein the second imaging assembly (5) is disposed near the light source (1) to be measured, and the second imaging assembly (5) includes an optical imaging element and an area array detector.
4. A beam measuring device according to claim 1, further comprising a spectral measuring assembly (4), said spectral measuring assembly (4) being arranged on said movable support (3).
5. A beam measuring device according to claim 1, further comprising a power measuring assembly (7) arranged on the movable support (3).
6. The beam measuring apparatus of claim 1 wherein a light attenuating element is disposed in front of the first imaging assembly.
7. The beam measuring device of claim 1 wherein the distance between the light source under test and the movable support is adjustable.
8. A beam measuring apparatus according to claim 1, wherein said movable carriage (3) includes a guide rail and a slider moving along the guide rail, and said first imaging unit is mounted on the slider.
9. The beam measuring device according to claim 1, wherein the light source (1) to be measured is mounted on a light source support (8) which comprises a rotating device for rotating the light source (1) to be measured.
10. The beam measuring device according to any one of claims 1 to 9, wherein the light source (1) to be measured is a laser light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921375052.1U CN210346907U (en) | 2019-08-23 | 2019-08-23 | Light beam measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921375052.1U CN210346907U (en) | 2019-08-23 | 2019-08-23 | Light beam measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210346907U true CN210346907U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921375052.1U Active CN210346907U (en) | 2019-08-23 | 2019-08-23 | Light beam measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210346907U (en) |
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2019
- 2019-08-23 CN CN201921375052.1U patent/CN210346907U/en active Active
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