A spectral measurement device and a precise positioning method

Abstract

This invention discloses a spectral measurement device, comprising: a spectrometer module, a probe module, and a main optical fiber for connecting the spectrometer module and the probe module; the spectrometer module includes a spectral detection component, a first optical path, an optical fiber connector, a first light source, and a control module; the probe module is equipped with at least two lenses, which are connected to the optical fiber connector via the main optical fiber; the control module is used to control the first light source to enter or leave the first optical path. This invention also discloses a precise positioning method for the spectral measurement device. This invention utilizes a method of generating a light spot by imaging on the object to be measured. Based on the principle of optical path reversibility, the actual measurement point can be directly determined. By rotating the spectral measurement device, the point receiving the strongest spectral energy can be found, thus achieving precise positioning of the measurement angle.

Description

Technical Field

[0001] This invention relates to the field of spectral imaging and detection technology, and more specifically, to a spectral measurement device and a precise positioning method. Background Technology

[0002] A multi-view spectrometer utilizes multiple lenses installed inside the instrument at different angles to perform spectral measurements and analysis on the measured point from multiple different perspectives, thereby acquiring spectral data from different angles. This avoids the need for multiple angle switching and measurements, significantly improving the measurement efficiency of the product line.

[0003] However, in practical applications, the convergence point of multi-view measurements, i.e., the actual measurement point, is often not presented intuitively, so users cannot easily correlate the instrument's measurement data with the actual measurement point. Furthermore, there is uncertainty regarding whether the measurement angle marked on the multi-view spectrometer, i.e., the angle between the multi-view lens optical path and the measurement point, matches the actual measurement angle. Summary of the Invention

[0004] To address at least one deficiency or improvement requirement in existing technologies, this invention provides a spectral measurement device and a precise positioning method. Utilizing optical fiber guidance to generate a light spot on the object under test, and based on the principle of optical path reversibility, the actual measurement point can be directly determined. Then, based on the principle that the spectrometer receives the strongest spectral energy at a vertical angle, the point receiving the strongest spectral energy is found by rotating the spectral measurement device, thus achieving precise positioning of the measurement angle.

[0005] To achieve the above objectives, according to a first aspect of the present invention, a spectral measurement device is provided, comprising:

[0006] A spectrometer module, a probe module, and a main optical fiber for connecting the spectrometer module and the probe module;

[0007] The spectrometer module includes a spectral detection component, a first optical path, an optical fiber connector, a first light source, and a control module;

[0008] The probe module is equipped with at least two lenses, which are connected to the optical fiber connector via the main optical fiber. The spectral detection component is used to receive the optical signal transmitted through the first optical path received by the optical fiber connector.

[0009] The control module is used to control the first light source to enter the first optical path, and the lens illuminates and focuses the light emitted by the first light source onto the surface of the object to be tested; the control module is also used to control the first light source to leave the first optical path, and the lens is also used to collect the light at the test point on the surface of the object to be tested, for multi-angle spectral measurement of the test point.

[0010] Furthermore, the aforementioned spectral measuring device also includes:

[0011] The probe module is equipped with a first lens and at least one second lens; the optical fiber connection port includes a first connection port and a second connection port with the same number of second lenses; wherein, the first connection port is connected to the first lens through a first optical fiber in the main optical fiber, and the second connection port is connected to the second lens one-to-one through a second optical fiber in the main optical fiber.

[0012] Furthermore, the aforementioned spectral measuring device also includes:

[0013] The first optical fiber is a 1-to-2 optical fiber;

[0014] It also includes a second light source, which is connected to another port of the first optical fiber and is used to locate the measurement angle.

[0015] Furthermore, the aforementioned spectral measuring device also includes:

[0016] When the first optical path is a spatial optical path enclosed by the boundary of the first optical path, the control module is a motor, used to control the first light source to enter the first optical path and emit light directly in front of the optical fiber connector, and also used to control the first light source to leave the first optical path.

[0017] Furthermore, the aforementioned spectral measuring device also includes:

[0018] When the first optical path is an optical fiber path, the first light source is coupled to the first optical path through an optical fiber coupler. The control module is used to control the optical fiber coupler, thereby controlling the first light source to enter or leave the first optical path.

[0019] Furthermore, the aforementioned spectral measuring device also includes:

[0020] The relative position of the probe module and the object to be tested is adjustable.

[0021] Furthermore, the aforementioned spectral measuring device also includes:

[0022] The probe module comprises at least two probes, which simultaneously perform multi-angle spectral measurements on different test points on the surface of the object to be tested.

[0023] Furthermore, the aforementioned spectral measuring device also includes:

[0024] The lenses on the probe module are divided into multiple groups. Each group of lenses illuminates and focuses the light emitted by the first light source onto the surface of the object to be tested, and is also used to perform multi-angle spectral measurements on the test points.

[0025] Furthermore, the aforementioned spectral measuring device also includes:

[0026] The angle of the lens on the probe module is adjustable.

[0027] According to a second aspect of the present invention, a method for precisely positioning a spectral measuring device is also provided, applied to the spectral measuring device as described in any of the preceding claims, comprising:

[0028] S1. The control module controls the first light source to enter the first optical path. The first light source emits light, which passes through the first optical path, the fiber optic connector, and the main optical fiber to reach the probe module. The light is then emitted through the first lens and the second lens on the probe module.

[0029] S2. Control the position of the object under test in space and / or the position and / or orientation of the probe module, so that the light emitted by the probe module is focused on the test point of the object under test; when the light emitted by the probe module is focused on the test point, determine that the test point is the measurement point of the spectral measurement device;

[0030] S3. The control module controls the first light source to leave the first optical path, blocking the second lens in the probe module and turning on the second light source; the light emitted by the second light source illuminates the point to be measured through the first optical fiber and the first lens;

[0031] S4. The first lens collects the reflected light from the point to be tested, which then passes through the first optical fiber, the first connector, and the first optical path to reach the spectral detection component.

[0032] S5. Adjust the angle of the probe module. When the intensity of the reflected light measured by the spectral detection component is the maximum, determine that the probe module is perpendicular to the object to be tested and is facing the point to be tested.

[0033] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0034] This invention provides a spectral measurement device and a precise positioning method. It utilizes optical fiber to guide light and generate a light spot on the object under test. Based on the principle of optical path reversibility, the actual measurement point can be directly determined. Then, based on the principle that the spectrometer receives the strongest spectral energy at a vertical angle, the point receiving the strongest spectral energy is found by rotating the spectral measurement device, thus achieving precise positioning of the measurement angle. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of a spectral measurement device provided in an embodiment of the present invention;

[0037] Figure 2 This is a partial schematic diagram of the fiber optic connector of a spectral measurement device provided in an embodiment of the present invention;

[0038] Figure 3 This is a partial schematic diagram of a probe module of a spectral measurement device provided in an embodiment of the present invention;

[0039] Figure 4 A partial schematic diagram of the probe module of another spectral measurement device provided in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram illustrating a multi-point, multi-angle spectral measurement method using a spectral measurement device provided in an embodiment of the present invention.

[0041] Figure 6 A schematic diagram illustrating a multi-point, multi-angle spectral measurement implementation method of another spectral measurement device provided in this embodiment of the invention;

[0042] Figure 7 This is a schematic diagram of the optical path structure of a spectral measurement device provided in an embodiment of the present invention;

[0043] Figure 8 This is a schematic diagram of the optical path structure of a spectral measurement device provided in an embodiment of the present invention. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0045] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0046] like Figure 1 As shown, a spectral measurement device is provided as a first embodiment of the present invention. In this embodiment, the spectral measurement device includes two parts: a spectrometer module and a probe module 5, and a main optical fiber 4 for connecting the probe module 5 and the spectrometer module. The spectrometer module is used to receive light from the surface of the object to be measured and perform spectral detection, while the probe module 5 is used to collect light from the surface of the object to be measured.

[0047] In this embodiment, the spectrometer module includes a spectral detection component 1, a first optical path 2, an optical fiber connector 3, and also has a built-in first light source 6. The first light source 6 emits light, which, after passing through the optical fiber connector 3, the main optical fiber 4, and the probe module 5, becomes multiple beams of light that reach the surface of the object to be measured 9. The probe module 5 has a first lens 50 and multiple second lenses 51. Therefore, the light emitted by the first light source 6 is emitted through the first lens 50 and the second lenses 51, illuminating the surface of the object to be measured 9. The multiple beams of light converge on the surface of the object to be measured 9. When they converge at the same point, this point can be located as the measurement point 10 of the spectral measurement device. This describes the measurement point positioning function of the spectral measurement device.

[0048] See Figure 2-3 ,in, Figure 2 yes Figure 1 A magnified view of part A in the diagram. Figure 3 yes Figure 1 A partially enlarged schematic diagram of section B. Specifically, the spectrometer module is equipped with fiber optic connectors 3, the number of which is the same as the number of lenses on the probe module 5. The first lens 50 corresponds to the first connector 30; multiple second lenses 51 each have a corresponding second connector 31. The main fiber 4 is used to achieve the one-to-one connection between the lenses and the connectors. Specifically, the first fiber 40 in the main fiber 4 connects the first lens 50 and the first connector 30, and the second fiber 41 connects the multiple second lenses 51 to the multiple second connectors 31.

[0049] As another embodiment of the present invention, a spectral measurement device is provided, which, based on the above embodiments, also has a precise positioning function for the measurement angle. The principle of precise angle positioning is based on the principle that the spectrometer receives the strongest spectral energy at a vertical angle; therefore, it is first necessary to position the vertical lens in the probe module 5. In this embodiment, the first lens 50, used for precise angle positioning, should be perpendicular to the object 9 to be measured; the other second lenses 51 installed on the probe module 5 are all arranged at a certain angle to the first lens 50. Precise angle positioning can be achieved using the first lens 50.

[0050] When performing precise positioning of the measurement angle, an external light source needs to be introduced, which is the second light source 7 in this embodiment. The second light source 7 is introduced by setting the first optical fiber 40, which is used to connect the first connector 30 and the first lens 50, as a 1-to-2 optical fiber, and connecting the third interface of the 1-to-2 optical fiber to the second light source 7.

[0051] Therefore, the specific method for precise positioning of the measurement angle is as follows: First, the measurement point is precisely positioned according to the aforementioned method. Then, all the second connection ports 31 are covered, leaving only the first lens 50, the first optical fiber 40, and the first connection port 30 as the only optical path capable of transmitting light signals. The second light source 7 is then turned on. The light from the second light source 7 travels through the first optical fiber 40 and the first lens 50 to illuminate the measurement point 10 of the object to be measured 9. The reflected light from the measurement point 10 returns to the first lens 50, travels through the first optical fiber 40, the first connection port 30, and the first optical path 2 to reach the spectral detection component 1, which displays the intensity of the reflected light. By adjusting the angle between the probe module 5 and the object to be measured 9, the intensity of the reflected light also changes. When the intensity of the reflected light reaches its maximum value, it indicates that the first lens 50 is perpendicular to the object to be measured 9. This describes the precise positioning function of the spectral measurement device.

[0052] As another embodiment of the present invention, such as Figure 3 As shown, the probe module 5 is arc-shaped, allowing the first lens 50 and the second lens 51 arranged on the probe module 5 to share a common center. The probe module 5 can be an arc shape in a one-dimensional direction, i.e., as shown... Figure 1 The probe module 5 shown has a second lens 51 that is not arranged perpendicular to the plane of the paper. More preferably, the probe module 5 is an arc shape in the two-dimensional direction, i.e., as shown... Figure 1 The probe module 5 shown preferably also has a second probe 51 arranged in a direction perpendicular to the plane of the paper, which can perform spectral measurements at more than 10 angles of the point to be measured. The second lens 51 on the probe module 5 is not limited to the one shown. Figure 1 , Figure 3The quantity is as shown. For example, the probe module 5 may include a first lens 50 and a plurality of second lenses 51 arranged sequentially at 10° central angles to the first lens. Another arrangement is to arrange the second lenses 51 at variable intervals to measure the spectrum of the point to be measured at more than 10 different azimuth angles. Those skilled in the art can also adjust the arrangement of the second lenses 51 on the probe module 5 as needed.

[0053] As another embodiment of the present invention, another shape of the probe module 5 is provided, such as... Figure 4 As shown, the probe module 5 can also be a three-dimensional shape composed of multiple lens mounting surfaces. For this type of probe module 5, a similar mounting method as in the previous embodiment can be used, simply ensuring that the lens orientation allows multiple lenses to converge at a single point, thus enabling multi-angle measurement of the measurement point 10. Those skilled in the art can also customize the shape of the probe module 5 according to requirements and install the corresponding lenses.

[0054] As another embodiment of the present invention, a spectral measuring device is provided that can simultaneously perform multi-angle spectral measurements on multiple test points 10 on the test object 9, such as... Figure 5 As shown. In this embodiment, multiple probe modules 5 are connected to the fiber optic connector 3 on the spectrometer module via the main optical fiber 4, enabling simultaneous multi-angle spectral measurements at multiple test points 10 on the test object 9.

[0055] As another embodiment of the present invention, a spectral measuring device is provided that can simultaneously perform multi-angle spectral measurements on multiple test points 10 on the test object 9, such as... Figure 6 As shown. In this embodiment, the lenses on the probe module 5 are divided into multiple groups, for example, Figure 6 (a) and Figure 6 (b) schematically illustrates two sets of shots, each set including the first shot (i.e. Figure 6 501, 502) and the second shot (i.e. Figure 6 In the above embodiments (511, 512), each group of lenses performs multi-angle spectral measurements at different test points 10 on the test object 9. Multi-point, multi-angle spectral measurements can also be achieved when only one probe module 5 is used. Those skilled in the art can also arbitrarily combine the above embodiments as needed to achieve multi-point, multi-angle spectral measurements.

[0056] In another embodiment of the present invention, the first lens 50 and the second lens 51 can be configured to be angle-adjustable, so that the probe module 5 can be adjusted as needed. Figure 3-4 Single-point multi-angle measurement as shown or as Figure 6 The multi-point, multi-angle measurement is shown.

[0057] Furthermore, regarding the internal structure of the spectrometer module, the configuration of its built-in light source, i.e., the first light source 6, needs to be considered. This invention provides two specific configuration methods. For example... Figure 7 As shown, in one embodiment, the first optical path 2 inside the spectrometer is a spatial optical path, which has a certain boundary, namely the first optical path boundary 21. In this case, the control module 8 is a motor, which controls the first light source 6 to enter and leave the first optical path 2. Figure 8 As shown, another implementation is that the first optical path 2 inside the spectrometer is an optical fiber path. In this case, the first light source 6 needs to be coupled to the first optical path 2 through an optical fiber coupler. The control module 8 needs to adjust the direction of the optical fiber coupler in order to control the first light source 6 to enter or leave the first optical path 2.

[0058] As another embodiment of the present invention, a method for precise positioning of a spectral measuring device is provided. This method includes a measurement point positioning method and a further measurement angle positioning method. The measurement point positioning method includes:

[0059] S1. The control module 8 controls the first light source 6 to enter the first optical path 2. The first light source 6 emits light, which passes through the first optical path 2, the optical fiber connector 3, and the main optical fiber 4 to reach the probe module 5. The light is emitted through the first lens 50 and the second lens 51 on the probe module 5.

[0060] S2. Control the position of the test object 9 in space and / or the position and / or orientation of the probe module 5, so that the light emitted by the probe module 5 is focused on the test point 10 of the test object 9; when the light emitted by the probe module 5 is focused on the test point 10, determine that the test point 10 is the measurement point of the spectral measurement device.

[0061] Precise positioning methods for measuring angles include:

[0062] S3. The control module 8 controls the first light source 6 to leave the first optical path 2, blocking the second lens 51 in the probe module 5, and turning on the second light source 7; the light emitted by the second light source 7 illuminates the test point 10 through the first optical fiber 40 and the first lens 50.

[0063] S4. The first lens 50 collects the reflected light from the test point 10, which then passes through the first optical fiber 40, the first connector 30, and the first optical path 2 to reach the spectral detection component 1.

[0064] S5. Adjust the angle of the probe module 5. When the intensity of the reflected light measured by the spectral detection component 1 is the maximum, determine that the probe module 5 is perpendicular to the object to be tested 9 and is facing the test point 10.

[0065] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A spectral measurement device, characterized in that, include: Spectrometer module, probe module (5), and main optical fiber (4) for connecting the spectrometer module and the probe module (5); The spectrometer module includes a spectral detection component (1), a first optical path (2), an optical fiber connector (3), a first light source (6), a second light source (7), and a control module (8); the second light source (7) is connected to another connector of the first optical fiber (40) for positioning the measurement angle. The probe module (5) is equipped with at least two lenses. The lenses are connected to the optical fiber connector (3) through the main optical fiber (4). The spectral detection component (1) is used to receive the optical signal transmitted through the first optical path (2) received by the optical fiber connector (3). The number of optical fiber connectors (3) is the same as the number of lenses on the probe module (5), and the first lens (50) is perpendicular to the lens of the object to be tested (9). The control module (8) is used to control the first light source (6) to enter the first light path (2), and the lens illuminates and focuses the light emitted by the first light source (6) onto the surface of the object to be tested (9); the control module (8) is also used to control the first light source (6) to leave the first light path (2), and the lens is also used to collect the light of the test point (10) on the surface of the object to be tested (9) for multi-angle spectral measurement of the test point (10).

2. The spectral measurement device as described in claim 1, characterized in that, Also includes: The probe module (5) is equipped with a first lens (50) and at least one second lens (51); the optical fiber connector (3) includes a first connector (30) and a second connector (31) in the same number as the second lens (51); wherein, the first connector (30) is connected to the first lens (50) through the first optical fiber (40) in the main optical fiber (4), and the second connector (31) is connected to the second lens (51) one by one through the second optical fiber (41) in the main optical fiber (4).

3. The spectral measurement device as described in claim 2, characterized in that: The first optical fiber (40) is a split-2 optical fiber.

4. The spectral measurement device as described in claim 1, characterized in that, Also includes: When the first optical path (2) is a spatial optical path enclosed by the first optical path boundary (21), the control module (8) is a motor, used to control the first light source (6) to enter the first optical path (2) and emit light directly in front of the optical fiber connector (3), and also used to control the first light source (6) to leave the first optical path (2).

5. The spectral measuring device as described in claim 1, characterized in that, Also includes: When the first optical path (2) is an optical fiber path, the first light source (6) is coupled to the first optical path (2) through an optical fiber coupler. The control module (8) is used to control the optical fiber coupler, thereby controlling the first light source (6) to access or leave the first optical path (2).

6. The spectral measuring device as described in claim 1, characterized in that, Also includes: The relative position of the probe module (5) and the object to be tested (9) is adjustable.

7. The spectral measurement device as described in claim 1, characterized in that: The probe module (5) consists of at least two probes, which simultaneously perform multi-angle spectral measurements on different test points (10) on the surface of the object to be tested (9).

8. The spectral measurement device as described in claim 3, characterized in that: The lenses on the probe module (5) are divided into multiple groups, each group of lenses including a first lens (50) and at least one second lens (51); each group of lenses respectively illuminates and focuses the light emitted by the first light source (6) onto the surface of the object to be tested (9), and is also used to perform multi-angle spectral measurements on the test point (10).

9. The spectral measuring device according to any one of claims 1-8, characterized in that: The lens angle on the probe module (5) is adjustable.

10. A method for precisely positioning a spectral measuring device, characterized in that, Applied to the spectral measurement apparatus as described in any one of claims 1-9, comprising: S1. The control module (8) controls the first light source (6) to enter the first optical path (2). The first light source (6) emits light, which reaches the probe module (5) through the first optical path (2), the optical fiber connector (3), and the main optical fiber (4). The light is emitted through the first lens (50) and the second lens (51) on the probe module (5). S2. Control the position of the object to be tested (9) in space and / or the position and / or orientation of the probe module (5) so that the light emitted by the probe module (5) is focused on the test point (10) of the object to be tested (9); when the light emitted by the probe module (5) is focused on the test point (10), the test point (10) is determined to be the measurement point of the spectral measurement device; S3. The control module (8) controls the first light source (6) to leave the first optical path (2), shield the second lens (51) in the probe module (5), and turn on the second light source (7); the light emitted by the second light source (7) illuminates the point to be measured (10) through the first optical fiber (40) and the first lens (50). S4. The first lens (50) collects the reflected light from the point to be tested (10), and passes through the first optical fiber (40), the first connector (30), and the first optical path (2) to reach the spectral detection component (1). S5. Adjust the angle of the probe module (5). When the intensity of the reflected light measured by the spectral detection component (1) is the maximum, determine that the probe module (5) is perpendicular to the object to be tested (9) and directly facing the point to be tested (10).

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