CN115014526B - Multichannel optical measurement equipment, installation method and application method - Google Patents
Multichannel optical measurement equipment, installation method and application method Download PDFInfo
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- CN115014526B CN115014526B CN202210956787.3A CN202210956787A CN115014526B CN 115014526 B CN115014526 B CN 115014526B CN 202210956787 A CN202210956787 A CN 202210956787A CN 115014526 B CN115014526 B CN 115014526B
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- 230000003287 optical effect Effects 0.000 title claims abstract description 67
- 238000005259 measurement Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000009434 installation Methods 0.000 title abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 249
- 238000010168 coupling process Methods 0.000 claims abstract description 249
- 238000005859 coupling reaction Methods 0.000 claims abstract description 249
- 239000013307 optical fiber Substances 0.000 claims abstract description 198
- 230000000712 assembly Effects 0.000 claims abstract description 39
- 238000000429 assembly Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000001228 spectrum Methods 0.000 claims abstract description 21
- 239000000835 fiber Substances 0.000 claims description 104
- 238000007689 inspection Methods 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 abstract description 11
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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- 230000001678 irradiating effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0218—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using optical fibers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0294—Multi-channel spectroscopy
Abstract
The application relates to a multichannel optical measurement device, an installation method and an application method, wherein the multichannel optical measurement device comprises an alignment structure, a plurality of optical fiber coupling assemblies, a spectrum detection assembly and a detection platform; the optical fiber coupling components comprise a lens and optical fibers coupled with the lens, the optical fiber coupling components are assembled on the alignment structure, optical axes of at least part of the optical fiber coupling components are intersected at a target point, the optical fiber coupling components are positioned on an arc taking the target point as a circle center, and the positions of the optical fiber coupling components are symmetrical relative to a vertical line passing through the target point; the alignment structure is used for aligning the optical fiber coupling assembly to a target point on the detection platform; the spectrum detection assembly is connected with the optical fibers of the optical fiber coupling assemblies. The multi-view spectral characteristics of the display device can be acquired at one time.
Description
Technical Field
The application relates to the technical field of optical instruments, in particular to a multi-channel optical measuring device, an installation method and an application method.
Background
With the rapid development of display technology, people have higher and higher requirements on the display quality and performance of display devices. Display devices such as LCD, OLED, miniLED, and micro led are increasingly widely used. Display technologies with high brightness, wide color gamut, high efficiency, long lifetime, and the like have been rapidly developed.
The spectrometer is a basic optical measuring instrument, and the principle of the spectrometer is that various detailed information of incident light, such as radiometric, photometric and colourmetric physical quantities, is obtained through analyzing and obtaining various detailed information of the incident light by acquiring a radiated, reflected or transmitted optical signal of a target object and processing the optical and electrical signals to obtain a spectral power distribution curve of the incident light, so that the identification of a material structure and a component and the measurement of the optical property of a material are realized.
The optical fiber spectrometer adopts optical fibers as optical signal coupling devices, and couples measured light into the spectrometer for spectral analysis. The basic configuration of the fiber spectrometer generally comprises an optical fiber, a slit, a collimation system, a dispersion system, an imaging system, a detector and the like, and the fiber spectrometer has the advantages that the flexibility of a measuring system is high, and a user can build a spectrum acquisition system according to needs.
However, the spectrometer can only obtain spectral information for one location of an object, such as a display device, at a time, and multiple realignments are required to obtain multi-view spectral characteristics of the display device. On the other hand, the aiming of the spectral measurement usually needs the aiming by means of an aiming camera or an external light source, and the structure is complex and the coaxial aiming is difficult to realize.
Disclosure of Invention
The embodiment of the application provides a multichannel optical measurement device, an installation method and an application method, which can acquire the multi-view spectral characteristics of a display device at one time.
In a first aspect, there is provided a multi-channel optical measurement device comprising:
an alignment structure;
the optical fiber coupling components comprise lenses and optical fibers coupled with the lenses, the optical fiber coupling components are arranged on the alignment structure, and the optical axes of at least part of the optical fiber coupling components are intersected at a target point; the optical fiber coupling assemblies are positioned on an arc with the target point as the center of a circle, and the positions of the optical fiber coupling assemblies are symmetrical relative to a vertical line passing through the target point;
an inspection platform, the alignment structure for aligning the fiber coupling assembly to the target point on the inspection platform;
and the spectrum detection assembly is connected with the optical fibers of the optical fiber coupling assemblies.
In some embodiments, any one of the optical fiber coupling assemblies is connected with a collimated light source, and the optical fiber coupling assembly connected with the collimated light source is a calibration optical fiber coupling assembly;
the optical fiber of the calibration optical fiber coupling component comprises a branch optical fiber, and the collimation light source is connected with the branch optical fiber.
In some embodiments, a collimated light source is connected to each of the fiber coupling assemblies on one side of the perpendicular line passing through the target point.
In some embodiments, the alignment structure includes an arcuate portion having a plurality of mounting points disposed thereon, and the fiber coupling assembly is disposed at the mounting points.
In some embodiments, the optical fiber is connected to the lens through an optical fiber connecting seat, and the position of the lens can be adjusted along the extending direction of the optical axis to adjust the relative distance between the lens and the optical fiber connecting seat;
in the use state, the end of the optical fiber is positioned on the focus of the lens.
In a second aspect, there is provided a method of installing a multi-channel optical measurement device as described above, comprising:
the optical fiber coupling assembly comprises a lens and an optical fiber coupled with the lens, and one optical fiber coupling assembly is selected from all the optical fiber coupling assemblies as a calibration optical fiber coupling assembly;
adjusting the angle of the calibration optical fiber coupling component to point to a target point and fixing;
pre-positioning a plurality of optical fiber coupling components on an arc track formed by taking a target point as a circle center and taking a calibrated optical fiber coupling component as a moving point;
adjusting the optical fiber coupling components except the calibration optical fiber coupling component to enable the optical axes of the optical fiber coupling components to pass through the target point and then to be fixed;
and connecting the optical fibers of a plurality of optical fiber coupling assemblies to the same spectrum detection assembly.
In some embodiments, before adjusting the angle of the calibration fiber optic coupling assembly, the installation method further comprises: pre-positioning a calibration fiber coupling assembly above a target point;
pre-positioning a calibration fiber coupling assembly above a target point, comprising:
the calibration optical fiber coupling component is pre-positioned above a target point according to the fixed focal length of a lens in the calibration optical fiber coupling component; alternatively, the first and second liquid crystal display panels may be,
and pre-positioning the calibration optical fiber coupling component above the target point, and enabling the target point to be within the range of the depth of field.
In some embodiments, adjusting the angle of the calibration fiber coupling assembly to point at the target point and fix the calibration fiber coupling assembly comprises:
connecting a collimating light source on the calibration optical fiber coupling component and the optical fiber coupling component which is positioned on the same side of the perpendicular line passing through the target point;
opening a collimation light source, and emitting calibration light through a calibration optical fiber coupling component and the optical fiber coupling component which is positioned at the same side of the vertical line passing through the target point;
adjusting the angles of the calibration optical fiber coupling component and the optical fiber coupling component which is positioned on the same side of the perpendicular line passing through the target point, so that the calibration light emitted by the calibration optical fiber coupling component and the optical fiber coupling component which is positioned on the same side of the perpendicular line passing through the target point is emitted to a diffuse reflector arranged at the target point;
and locking the calibration optical fiber coupling assembly.
In some embodiments, adjusting the fiber coupling assembly other than the calibration fiber coupling assembly to fix the optical axis thereof after passing through the target point includes:
for a fiber coupling component that is on the same side of a perpendicular through the target point as a calibration fiber coupling component: directly locking the calibration fiber coupling assembly at the same time or after or before locking the calibration fiber coupling assembly;
for the fiber coupling assembly located on the other side of the perpendicular passing through the target point:
turning on a collimation light source, and emitting calibration light through an optical fiber coupling assembly;
adjusting the angle of the optical fiber coupling component passing through the other side of the perpendicular line of the target point to enable the calibrated light intensity reflected by the plane mirror arranged at the target point to be maximum; the fiber coupling assembly is locked.
In a third aspect, there is provided a method of using the multi-channel optical measurement device as described above, including:
placing a display device at a target point of a detection platform;
adjusting an alignment structure so that the optical axes of at least part of optical fiber coupling assemblies arranged on the alignment structure are intersected with a display device, wherein each optical fiber coupling assembly comprises a lens and an optical fiber coupled with the lens;
adjusting a measurement angle and/or a working distance between a display device and the fiber coupling assembly.
In some embodiments, adjusting the measurement angle between the display device and the fiber coupling assembly comprises:
connecting a collimated light source to the optical fiber coupling assembly;
turning on a collimation light source, and emitting calibration light through an optical fiber coupling assembly;
adjusting the angle of the display device to make the calibrated light intensity reflected by the display device reach the maximum;
and/or, adjusting a working distance between a display device and the optical fiber coupling component, including:
connecting a collimating light source on the optical fiber coupling component;
turning on a collimation light source, and emitting calibration light through an optical fiber coupling assembly;
illuminating a spot on a display device;
and adjusting the display device to ensure that the calibration light emitted by the optical fiber coupling component is concentric with the light spot.
The beneficial effect that technical scheme that this application provided brought includes:
the optical fiber coupling assemblies of the multi-channel optical measuring device provided by the embodiment of the application are provided with a plurality of optical fiber coupling assemblies, the spectral characteristics of a plurality of visual angles on a display device can be measured at one time, and the optical axes of at least part of the optical fiber coupling assemblies are intersected at a target point to realize coaxial measurement.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, 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 schematic view of an optical fiber coupling assembly according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a multi-channel optical measurement apparatus provided in an embodiment of the present application.
In the figure: 1. an alignment structure; 10. an arcuate portion; 2. a fiber coupling assembly; 20. a lens; 21. an optical fiber; 22. calibrating the optical fiber coupling component; 23. branching fibers; 24. an optical fiber connecting seat; 3. a spectral detection assembly; 4. detecting a platform; 5. a collimated light source; 6. target point.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 and 2, the embodiment of the present application provides a multi-channel optical measurement device, which includes an alignment structure 1, a plurality of fiber coupling assemblies 2, a spectrum detection assembly 3 and a detection platform 4; the optical fiber coupling assemblies 2 comprise a lens 20 and optical fibers 21 coupled with the lens 20, the optical fiber coupling assemblies 2 are arranged on the alignment structure 1, optical axes of at least part of the optical fiber coupling assemblies 2 are intersected at a target point 6, the optical fiber coupling assemblies 2 are positioned on an arc taking the target point 6 as a circle center, and the positions of the optical fiber coupling assemblies 2 are symmetrical relative to a vertical line passing through the target point 6; by adopting the arrangement mode, the distances from the light emitted by each optical fiber coupling component 2 to the target point 6 are consistent, and further, the spectral characteristics of each visual angle can be acquired under the same condition. The alignment structure 1 is used for aligning the fiber coupling component 2 to a target point 6 on the detection platform 4; the spectral detection assembly 3 is connected to the optical fibers 21 of the plurality of fiber coupling assemblies 2.
The multi-channel optical measurement device provided by the embodiment has a plurality of optical fiber coupling assemblies 2, can measure the spectral characteristics of a plurality of viewing angles on the display device at one time, and the optical axes of at least part of the optical fiber coupling assemblies 2 intersect at a target point 6 to realize coaxial measurement.
It should be noted that the arc may be a semicircular arc, a minor arc, such as a quarter arc, or a major arc, which is specifically adopted may be set according to actual requirements.
The spectrum sensing assembly 3 may use a spectrometer or other instrument for measuring a spectrum.
The optical axes intersect at the optical axis of the fiber coupling element 2 at a target point 6.
The collimation light source 5 can adopt an LED light source or a laser light source, and is reasonably selected according to actual detection requirements.
Referring to fig. 2, the plurality of optical fiber coupling assemblies 2 are located on an arc centered on the target point 6, and the positions of the plurality of optical fiber coupling assemblies 2 are symmetrical with respect to a vertical line passing through the target point 6.
In this example, a light source is used for coaxial calibration and measurement, and therefore, in some preferred embodiments, a collimated light source 5 is connected to any one of the fiber coupling assemblies 2, and the fiber coupling assembly 2 connected with the collimated light source 5 is the calibration fiber coupling assembly 22. The optical fiber 21 of the calibration optical fiber coupling component 22 includes a branch fiber 23, the collimated light source 5 is connected to the branch fiber 23, the branch fiber 23 can adopt a one-to-two optical fiber, so as to ensure that the light emitted from the collimated light source 5 can pass through the calibration optical fiber coupling component 22 and then exit to the target point 6, and the light reflected by the plane mirror arranged at the target point 6 enters the spectrum detection component 3 after passing through the calibration optical fiber coupling component 22.
Furthermore, the fiber coupling assemblies 2 on one side of the perpendicular line passing through the target point 6 are connected with the collimating light sources 5, which is beneficial to the subsequent situation that secondary calibration is needed.
Referring to fig. 2, in some embodiments, the alignment structure 1 includes an arc-shaped portion 10, and a plurality of mounting points are disposed on the arc-shaped portion 10, and each mounting point mounts one fiber coupling assembly 2, so as to mount all the fiber coupling assemblies 2.
Referring to fig. 1, in some preferred embodiments, the optical fiber 21 is connected to the lens 20 through the optical fiber connecting seat 24, and the position of the lens 20 can be adjusted along the extending direction of the optical axis to adjust the relative distance between the lens 20 and the optical fiber connecting seat 24, so as to be able to adjust to couple the lens 20 and the optical fiber 21; in the use state, the end of the optical fiber 21 is located at the focus of the lens 20, so as to ensure that the optical fiber 21 is coupled with the focus of the lens 20.
The optical fiber 21 can be connected with the spectrum detection component or the brightness measuring device, the parallel light source is used for directly irradiating the lens 20, and the adjustment is carried out so that the peak of the spectrum detection component is the highest or the measured value of the brightness measuring device reaches the maximum, which indicates that the coupling is already carried out; the fiber attachment receptacle 24 may employ off-the-shelf mechanisms, such as, as one example, the fiber attachment receptacle 24 employs a fiber flange.
It should be noted that the multi-channel optical measurement device may further include a plurality of manipulators, where the manipulator is installed with the optical fiber coupling component 2, and the manipulator is controlled to adjust and fix the optical fiber coupling component 2.
In order to ensure that the optical fiber coupling assemblies 2 of the multichannel optical measurement device are coaxial, the embodiment of the present application further provides an installation method of the multichannel optical measurement device, which is suitable for the multichannel optical measurement device provided by the foregoing embodiment, and includes the following steps:
101: the optical fiber coupling assembly 2 comprises a lens 20 and an optical fiber 21 coupled with the lens 20, and one optical fiber coupling assembly 2 is selected from all the optical fiber coupling assemblies 2 as a calibration optical fiber coupling assembly 22.
102: the angle of the calibration fiber coupling assembly 22 is adjusted so that it is directed to the target point 6 and fixed.
103: the plurality of optical fiber coupling assemblies 2 are pre-positioned on an arc track formed by taking the target point 6 as a circle center and taking the calibration optical fiber coupling assembly 22 as a moving point.
104: and adjusting the optical fiber coupling component 2 except the calibration optical fiber coupling component 22 to enable the optical axis of the optical fiber coupling component to pass through the target point 6 and then be fixed.
105: the optical fibers 21 of a plurality of optical fiber coupling assemblies 2 are connected to the same spectrum detection assembly 3.
Compared with the coaxial installation and adjustment by using an external device, the installation method provided by the embodiment of the application has the problems that the whole device is complex and heavy, and the coaxial installation and adjustment effect is difficult to guarantee, an internal coaxial calibration mode is utilized, the calibrated optical fiber coupling component 22 is utilized to enable the optical axis of the calibrated optical fiber coupling component to point to a target point 6 and be perpendicular to the detection platform 4, the reference is used, and then the rest optical fiber coupling components 2 are adjusted to enable the optical axis of each optical fiber coupling component 2 to pass through the target point 6, so that the coaxial installation and adjustment calibration is completed.
In the present application, there are various arrangements of the calibration fiber coupling assembly 22 and the target point 6 in terms of the actual detection requirement, such as the calibration fiber coupling assembly 22 is located above the target point 6 as an example.
At this point, the installation method further includes pre-positioning the calibration fiber coupling assembly 22 above the target point 6 before adjusting the angle of the calibration fiber coupling assembly 22 at step 102.
In particular, there are various ways to pre-position the calibration fiber coupling assembly 22 above the target point 6.
For example, in a preferred embodiment, the calibration fiber coupling assembly 22 may be pre-positioned above the target point 6 according to the fixed focal length of the lens 20 in the calibration fiber coupling assembly 22.
As another example, in another preferred embodiment, the calibration fiber coupling assembly 22 is pre-positioned above the target point 6, and the target point 6 is within the depth of field of the lens 20 in the calibration fiber coupling assembly 22.
For the arrangement shown in fig. 2, adjusting the angle of the calibration fiber coupling assembly 22 to point at the target point 6 and fix it comprises:
201: a collimated light source 5 is attached to the calibration fiber coupling assembly 22 and the fiber coupling assembly 2 on the same side of the fiber coupling assembly as the perpendicular through the target point 6.
202: the collimated light source 5 is turned on and the calibration light is emitted through the calibration fiber coupling assembly 22 and the fiber coupling assembly 2 on the same side of the perpendicular through the target point 6 as it is.
203: and adjusting the angles of the calibration optical fiber coupling component 22 and the optical fiber coupling component 2 which is positioned on the same side of the vertical line passing through the target point 6, so that the calibration light emitted by the calibration optical fiber coupling component 22 and the optical fiber coupling component 2 which is positioned on the same side of the vertical line passing through the target point 6 is emitted to the diffuse reflector arranged at the target point 6, and the light spot of the calibration light is superposed with the cross line on the diffuse reflector.
204: the calibration fiber coupling assembly 22 is locked.
It is apparent that the optical axis of the calibration fiber coupling assembly 22 intersects a perpendicular line passing through the target point 6 at the target point 6, as shown in fig. 2.
It can be seen that, in the present embodiment, the optical axis of the calibration fiber coupling assembly 22 is not perpendicular to the detection platform 4, but is at an angle with respect to the detection platform 4.
Meanwhile, in the present embodiment, the adjustment fixing of the calibration fiber coupling assembly 22 is determined by the calibration fiber coupling assembly 22 and the fiber coupling assembly 2 located on the same side of the vertical line passing through the target point 6.
In the embodiment of fig. 2, the adjusting of the fiber coupling assembly 2 except the calibration fiber coupling assembly 22 to fix its optical axis after passing through the target point 6 includes the following steps:
for the fiber coupling assembly 2 located on the same side of the perpendicular through the target point 6 as the calibration fiber coupling assembly 22: and (3) directly locking the calibration optical fiber coupling component 22 at the same time or after or before locking the calibration optical fiber coupling component 22, because the calibration optical fiber coupling component 22 and the optical fiber coupling component 2 which is positioned at the same side of the perpendicular line passing through the target point 6 are coaxially arranged after the steps 201 to 204.
For the fiber coupling assembly 2 located on the other side of the perpendicular passing through the target point 6:
301: the collimated light source 5 is turned on and the calibration light is emitted through the fiber coupling assembly 2.
302: the angle of the fiber coupling component 2 on the other side of the perpendicular line passing through the target point 6 is adjusted to maximize the calibrated light intensity reflected by the plane mirror arranged at the target point 6.
303: locking the fiber coupling assembly 2.
Specifically, the optical fiber 21 of the optical fiber coupling component 2 is further connected to the spectrum detection component 3, the reflected calibration light enters the spectrum detection component 3, and when the peak of the peak in the spectrum detection component 3 is the highest, it indicates that the calibration light intensity reaches the maximum.
In the present application, when performing coaxial calibration, it is not necessary to make the optical axis of the calibration fiber coupling component 22 perpendicular to the detection platform 4, and the optical axes of the calibration fiber coupling component 22 and the fiber coupling component 2 located on the same side of the perpendicular line passing through the target point 6 are compared with the diffuse mirror disposed at the target point 6, so that it can be confirmed that the coaxial calibration of the calibration fiber coupling component 22 and the fiber coupling component 2 located on the same side of the perpendicular line passing through the target point 6 is achieved.
For the optical fiber coupling component 2 on the other side of the perpendicular line passing through the target point 6, only the diffuse reflection mirror needs to be replaced by a plane reflection mirror, the calibration optical fiber coupling component 22 and the collimation light source 5 connected with the optical fiber coupling component 2 on the same side of the perpendicular line passing through the target point 6 are utilized to emit calibration light through the calibration optical fiber coupling component 22 and the optical fiber coupling component 2, the calibration light is reflected to the optical fiber coupling component 2 on the other side of the perpendicular line passing through the target point 6 through the plane reflection mirror, and the coaxial calibration of the optical fiber coupling component 2 can be realized by adjusting the optical fiber coupling component 2.
The embodiment of the present application further provides an application method of a multi-channel optical measurement device, which is suitable for the multi-channel optical measurement device provided in the above embodiment, and includes the following steps:
401: the display device is placed at the target point 6 of the detection platform 4.
402: the alignment structure 1 is adjusted so that the optical axes of at least some of the optical fiber coupling assemblies 2 assembled on the alignment structure 1 intersect with each other on the display device, and the optical fiber coupling assemblies 2 include a lens 20 and an optical fiber 21 coupled to the lens 20.
403: the measurement angle and/or working distance between the display device and the fiber coupling assembly 2 is adjusted.
And after the adjustment of the measuring angle and/or the working distance is completed, the measurement of the multi-view spectrum information can be started.
When the multi-channel optical measuring device is used, the multi-channel optical measuring device can be rotated around the rotating shaft, and other more angle measurements can be realized. It is clear that the above-mentioned axis of rotation passes through the target point 6 and is perpendicular to the plane common to the respective optical axes.
The adjusting of the measurement angle between the display device and the optical fiber coupling assembly 2 specifically includes the following steps:
501: a collimated light source 5 is connected to the fiber coupling assembly 2.
502: the collimated light source 5 is turned on and the calibration light is emitted through the fiber coupling assembly 2.
503: and adjusting the angle of the display device to maximize the calibrated light intensity reflected by the display device. In specific judgment, when the peak in the spectrum detection component 3 is the highest, the calibration light intensity is indicated to be the maximum.
The adjusting of the working distance between the display device and the optical fiber coupling assembly 2 specifically includes the following steps:
601: a collimated light source 5 is connected to the fiber coupling assembly 2.
602: the collimated light source 5 is turned on and the calibration light is emitted through the fiber coupling assembly 2.
603: a light spot is lit on the display device.
604: and adjusting the distance between the display device and the optical fiber coupling component 2 so that the calibration light emitted by the optical fiber coupling component 2 is concentric with the light spot.
The working distance is adjusted to maximize the light intensity of other channels (i.e. the channels of the fiber coupling component 2) of the multi-channel optical measuring device.
In a word, the multi-channel optical measurement equipment, the installation method and the application method can realize multi-view coaxial measurement, do not need to be realigned for many times, can carry out high-precision alignment measurement, and improve the measurement efficiency.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The previous description is only an example of the present application, and is provided to enable any person skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A multi-channel optical measuring device, characterized in that it comprises:
an alignment structure (1);
a plurality of optical fiber coupling components (2), wherein each optical fiber coupling component (2) comprises a lens (20) and an optical fiber (21) coupled with the lens (20), the optical fiber coupling components (2) are arranged on the alignment structure (1), and the optical axes of at least part of the optical fiber coupling components (2) intersect at a target point (6); the optical fiber coupling assemblies (2) are positioned on an arc with the target point (6) as the center, and the positions of the optical fiber coupling assemblies (2) are symmetrical relative to a vertical line passing through the target point (6);
an inspection platform (4), the alignment structure (1) for aligning the fiber coupling assembly (2) to the target point (6) on the inspection platform (4);
a spectrum detection assembly (3) connected with the optical fibers (21) of the optical fiber coupling assemblies (2);
selecting one optical fiber coupling component (2) from all the optical fiber coupling components (2) as a calibration optical fiber coupling component (22);
when calibration light emitted by the calibration optical fiber coupling component (22) and the optical fiber coupling component (2) which is positioned on the same side of the perpendicular line passing through the target point (6) emits to the diffuse reflection mirror arranged at the target point (6), the light spot of the calibration light is superposed with the cross line on the diffuse reflection mirror; the diffuse reflection mirror is replaced by a plane reflection mirror, calibration light emitted by the optical fiber coupling component (2) is reflected by the plane reflection mirror arranged at the target point (6), enters the spectrum detection component (3) through the optical fiber coupling component (2) positioned on the other side of the vertical line passing through the target point (6), and when the wave crest of the spectrum detection component (3) is highest, all the optical fiber coupling components (2) are coaxial.
2. A multi-channel optical measuring device as claimed in claim 1, characterized in that:
any one optical fiber coupling component (2) is connected with a collimated light source (5), and the optical fiber coupling component (2) connected with the collimated light source (5) is a calibration optical fiber coupling component (22);
the optical fiber (21) of the calibration optical fiber coupling component (22) comprises a branch fiber (23), and the collimation light source (5) is connected to the branch fiber (23).
3. A multi-channel optical measuring device as claimed in claim 1, characterized in that:
and the optical fiber coupling assemblies (2) positioned on one side of the perpendicular line passing through the target point (6) are connected with collimation light sources (5).
4. A multichannel optical measurement device as claimed in any one of claims 1 to 3, characterized in that:
the alignment structure (1) comprises an arc-shaped part (10), a plurality of mounting points are arranged on the arc-shaped part (10), and the optical fiber coupling assembly (2) is assembled on the mounting points.
5. A multi-channel optical measuring device as claimed in claim 1, characterized in that:
the optical fiber (21) is connected with the lens (20) through an optical fiber connecting seat (24), and the position of the lens (20) can be adjusted along the extending direction of the optical axis so as to adjust the relative distance between the lens (20) and the optical fiber connecting seat (24);
in the use state, the end of the optical fiber (21) is positioned on the focal point of the lens (20).
6. A method of mounting a multi-channel optical measuring device according to claim 1, comprising:
the optical fiber coupling component (2) comprises a lens (20) and an optical fiber (21) coupled with the lens (20), and one optical fiber coupling component (2) is selected from all the optical fiber coupling components (2) to serve as a calibrated optical fiber coupling component (22);
adjusting the angle of the calibration optical fiber coupling component (22) to point at a target point (6) and fixing;
pre-positioning a plurality of optical fiber coupling components (2) on an arc track formed by taking a target point (6) as a circle center and taking a calibration optical fiber coupling component (22) as a moving point;
adjusting the optical fiber coupling component (2) except the calibration optical fiber coupling component (22) to enable the optical axis of the optical fiber coupling component to pass through the target point (6) and then be fixed;
and connecting the optical fibers (21) of a plurality of optical fiber coupling assemblies (2) to the same spectrum detection assembly (3).
7. A method of mounting a multi-channel optical measurement device according to claim 6, wherein before adjusting the angle of the calibration fiber coupling assembly (22), the method further comprises: pre-positioning a calibration fiber coupling assembly (22) above a target point (6);
pre-positioning a calibration fiber coupling assembly (22) above a target point (6), comprising:
according to the fixed focal length of a lens (20) in the calibration optical fiber coupling component (22), the calibration optical fiber coupling component (22) is positioned above a target point (6) in a preset position; alternatively, the first and second electrodes may be,
the calibration fiber coupling assembly (22) is pre-positioned above the target point (6) and the target point (6) is within the depth of field.
8. The method of mounting a multi-channel optical measuring device according to claim 6, wherein adjusting the angle of the calibration fiber coupling assembly (22) to point at the target point (6) and fix it comprises:
connecting a collimated light source (5) on a calibration fiber coupling component (22) and the fiber coupling component (2) which is positioned on the same side of a vertical line passing through the target point (6);
turning on a collimated light source (5), and emitting calibration light through a calibration optical fiber coupling component (22) and the optical fiber coupling component (2) which is positioned on the same side of a vertical line passing through the target point (6);
adjusting the angles of the calibration fiber coupling assembly (22) and the fiber coupling assembly (2) which is positioned on the same side of the vertical line passing through the target point (6) to enable the calibration fiber coupling assembly (22) and the calibration light which is emitted by the fiber coupling assembly (2) which is positioned on the same side of the vertical line passing through the target point (6) to emit to a diffuse mirror arranged at the target point (6);
locking the calibrated fiber coupling assembly (22).
9. A method of mounting a multi-channel optical measuring device according to claim 8, wherein adjusting the fiber coupling assembly (2) other than the calibration fiber coupling assembly (22) to fix its optical axis after passing through the target point (6) comprises:
for the fiber coupling assembly (2) located on the same side of a perpendicular through the target point (6) as the calibration fiber coupling assembly (22): locking directly at the same time as, after or before locking the calibration fiber coupling assembly (22);
for the fiber coupling assembly (2) located on the other side of the perpendicular passing through the target point (6):
turning on the collimating light source (5), and emitting calibration light through the optical fiber coupling component (2);
adjusting the angle of the optical fiber coupling component (2) passing through the other side of the perpendicular line of the target point (6) to maximize the calibrated light intensity reflected by the plane mirror arranged at the target point (6); locking the fiber coupling assembly (2).
10. A method of using a multi-channel optical measurement device as claimed in claim 1, characterized in that it comprises:
placing the display device at a target point (6) of the detection platform (4);
adjusting an alignment structure (1) so that the optical axes of at least part of optical fiber coupling assemblies (2) assembled on the alignment structure (1) intersect at a display device, wherein each optical fiber coupling assembly (2) comprises a lens (20) and an optical fiber (21) coupled with the lens (20);
adjusting a measurement angle and/or a working distance between a display device and the fiber coupling assembly (2).
11. Method of application of a multi-channel optical measuring device according to claim 10, wherein adjusting the measuring angle between the display means and the fiber coupling assembly (2) comprises:
connecting a collimated light source (5) on the optical fiber coupling component (2);
turning on the collimation light source (5), and emitting calibration light through the optical fiber coupling component (2);
adjusting the angle of the display device to maximize the calibrated light intensity reflected by the display device;
and/or, adjusting a working distance between a display device and the fiber coupling assembly (2), comprising:
connecting a collimating light source (5) on the optical fiber coupling component (2);
turning on the collimating light source (5), and emitting calibration light through the optical fiber coupling component (2);
illuminating a spot on a display device;
and adjusting the display device to ensure that the calibration light emitted by the optical fiber coupling component (2) is concentric with the light spot.
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