Light emission assembly for extended optical path measurement of immersion type full-spectrum detector

Abstract

The invention relates to a divisional application of which the application number is 201911198047.2. The embodiment of the invention discloses a light emitting assembly for prolonging optical path measurement of an immersion type full-spectrum detector. The light reflection assembly comprises a first reflection part and a second reflection part which are oppositely matched with each other, and the first reflection part and the second reflection part are each provided with a plurality of reflection mirror face sets. The first reflecting part and the second reflecting part are respectively fixed in the light path detection system of the immersion type full-spectrum detector, are positioned on two sides of a system to be detected, and are sealed in the optical transparent sealing window. Through the reflection of the reflection mirror group between the two reflection parts, the optical path of the initial incident light in the system to be measured is increased. The method has the beneficial effects that 1, under the condition of not changing the optical path size and appearance of the existing optical measurement instrument equipment, the measurement optical path of a system to be measured is increased, the detection limit of the existing method is reduced, and the sensitivity is improved; 2, due to the reflection effect between the two reflection parts, the light incident direction and the light emergent direction are both perpendicular to a system to be measured, and an existing optical measuring instrument can be matched with the light reflection assembly through simple light path adjustment. And 3, the reflecting mirror surface group is not in direct contact with the system to be detected and the external environment, so that the possibility of damage to the mirror surface is reduced, and the practicability is very high.

Description

Description of the case

[0001] This application is a divisional application. The application number of the original application is 201911198047.2, the application date is November 29, 2019, and the name of the invention is “A light reflecting component for extending the optical path”. Technical Field

[0002] The invention belongs to the field of optical measurement, and in particular relates to a light emitting component for extended optical path measurement of an immersion full-spectrum detector. Background Art

[0003] Lambert-Beer law is the basis of many optical analysis methods. Its quantitative analysis is based on the fact that the measured absorbance A is proportional to the concentration c of the absorbing substance and the thickness b (optical path) of the absorbing layer. The analysis method based on this law is widely used in the fields of environment, biological hygiene, water conservancy, etc. It has the characteristics of low instrument and equipment cost, relatively simple operation, high accuracy of results and good reproducibility.

[0004] The optical path length has an important influence on the sensitivity and detection limit of the analysis method based on the Lambert-Beer law. The optical path length of the cuvette or flow optical detection cell of the common traditional spectrophotometric analysis is mostly fixed in the range of 1 to 3 cm. Samples with small absorption coefficients or low concentrations are often difficult to measure, which greatly limits the range of types and concentrations of substances detected by traditional spectrophotometric analysis.

[0005] Microplate reader, also commonly known as microplate reader, is a conventional instrument for measuring enzyme-linked immunosorbent assay. It is a disguised professional spectrophotometer. The biggest difference between it and traditional spectrophotometric analysis is that the volume of the absorbance cell is small (microliter order) and the direction of the light path is perpendicular to the liquid surface of the solution. This makes the optical path length of the microplate reader lower than that of traditional spectrophotometric analysis, which greatly limits the application scope of the photometric analysis of the microplate reader. In the measurement activities of the immersion full-spectrum analyzer, since the instrument measurement optical path length is fixed, for the case where the concentration of the test object in the water body to be tested is low, it can only be achieved by increasing the instrument optical path length at this stage, which greatly increases the manufacturing cost and weight of the instrument and reduces the portability and universality of the instrument. Gas optical detection also faces the problem of limited optical path length. At this stage, most of them can only partially solve the problem through high-concentration standard gas calibration and long-distance detection. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a light emitting component for extended optical path measurement of an immersion full-spectrum detector, which can effectively increase the optical path of light in the system to be measured, thereby reducing the detection limit of the system to be measured and improving the detection sensitivity, and has good practicality.

[0007] The present invention provides the following technical solutions:

[0008] An optical emission component for extending the optical path measurement of an immersion full-spectrum detector, characterized in that the optical reflection component comprises a first reflection part and a second reflection part, and the first reflection part and the second reflection part are respectively arranged on both sides of the light-transmitting surface of the system to be measured; the first reflection part comprises m groups of first reflection mirror groups, and the second reflection part comprises n groups of second reflection mirror groups, where m is an integer greater than or equal to 1, and n is an integer greater than or equal to 0; each of the first reflection mirror groups and the second reflection mirror groups is formed by two reflection mirrors intersecting at a 90-degree angle, and the 90-degree angle formed by the two reflection mirrors faces the system to be measured, and the angle bisecting plane is perpendicular to the light-transmitting surface of the system to be measured.

[0009] The first reflection mirror groups of the first reflection part and the second reflection mirror groups of the second reflection part are arranged in a relative dislocation manner, so that the initial incident light travels forward in turn under the reflection of the first reflection mirror groups and the second reflection mirror groups.

[0010] As a further technical solution of the present invention, the optical reflection component is provided with a light incident hole / slit and a light exit hole / slit, and both the light incident hole / slit and the light exit hole / slit are arranged on the second reflection part or on the second reflection part and the first reflection part respectively.

[0011] The first reflection part and the second reflection part of the optical reflection component are respectively fixed in the optical path detection system of the immersion full-spectrum detector, located on both sides of the system to be measured, and are sealed in an optically transparent sealing window.

[0012] As a further technical solution of the present invention, the first reflection mirror groups on the first reflection part and the second reflection mirror groups on the second reflection part can be rotated by different angles around their corresponding incident lights on a plane parallel to the optically transparent sealing window.

[0013] As a preferred technical solution of the present invention, the initial incident light source of the optical reflection component is a point light source or a line light source.

[0014] As a further technical solution of the present invention, the system to be measured can be in a liquid or gaseous form.

[0015] As a further technical solution of the present invention, the optical path length depends on the vertical width of the system to be measured between the first reflection part and the second reflection part and the number of reflections of the light in the system to be measured.

[0016] As a preferred technical solution of the present invention, the optical reflection component can be positioned in the instrument optical path system either singly or in multiple sets, or can be freely placed outside the container of the system to be measured for use.

[0017] As a further technical solution of the present invention, the multiple sets of optical reflection components built into the instrument optical path detection system can be selected for replacement manually or automatically to meet different optical path requirements.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. By arranging the first reflection part and the second reflection part that cooperate with each other on both sides of the system to be measured, when the light enters the system to be measured, the measurement optical path is effectively increased through multiple reflections. Without changing the appearance and size of the existing optical measurement instrument, the detection limit of the existing method is reduced, and the detection sensitivity is improved.

[0020] 2. The reflection mirror group arranged on the first reflection part and the second reflection part makes the directions of the incident light and the outgoing light perpendicular to the system to be measured. The existing optical measurement instrument can match this optical reflection component through slight adjustment of the optical path system.

[0021] 3. The present invention increases the measurement optical path by arranging a reflection mirror group that cooperates with each other to increase the optical path through light reflection. The reflection mirror group does not directly contact the system to be measured and the external environment, reducing the possibility of mirror damage and having strong practicability. Description of the Drawings

[0022] Figure 1a and 1b are the structural diagrams of the light emission component of the present invention for detecting traditional colorimetric cuvettes;

[0023] Figure 2a and 2b are the structural diagrams of the light emission component of the present invention for flow-through optical detection;

[0024] Figure 3 are the structural diagrams of the light emission component of the present invention for detecting microplate readers;

[0025] Figure 4a and 4b are the structural diagrams of the light emission component of the present invention for detecting immersion spectrometers;

[0026] Figure 5a and 5b are the structural diagrams of the light emission component of the present invention for gas optical detection;

[0027] Figure 6a and 6b are the schematic diagrams of the light path directions in two combined structures of the reflection mirror group;

[0028] Figure 7 is the schematic diagram of the light path of the light emission component of the present invention for a rectangular light-transmitting surface. Among them, the center point of ⊙ is the light incident point, the center point of X is the light outgoing point, Li is the initial light incident position point, L e is the final light exit position point, and the dashed line represents the front - to - back order of the incident and exit light;

[0029] Figure 8 is the schematic diagram of the light path of the light - emitting component of the present invention for a circular light - transmitting surface. Among them, the center point of ⊙ is the light incident point, the center point of X is the light exit point, L i is the initial light incident position point, L e is the final light exit position point, and the dashed line represents the front - to - back order of the incident and exit light;

[0030] The meanings of the marks in the drawings are as follows.

[0031] 1. The first reflection part; 2. The second reflection part; 3. The first reflection mirror group; 4. The second reflection mirror group; 5. The hole / slit for light to enter; 6. The hole / slit for light to exit; Detailed implementation manners

[0032] The following specifically describes the present invention with reference to specific embodiments.

[0033] Embodiment 1

[0034] As Figure 1a and 1b shown, a cuvette light - reflection component with a longer optical path includes a first reflection part 1, a second reflection part 2, a light - incident hole / slit 5, and a light - exit hole / slit 6. Among them, several mutually corresponding first reflection mirror groups 3 are arranged on the first reflection part 1, and several mutually corresponding second reflection mirror groups 4 are arranged on the second reflection part 2.

[0035] As Figure 1a shown, the number of the first reflection mirror groups 3 on the first reflection part 1 of the cuvette light - reflection component is 1 more than the number of the second reflection mirror groups 4 arranged on the second reflection part 2. After the light enters from the light - incident hole / slit 5 on the second reflection part 2, it is reflected by the first reflection mirror groups 3 on the first reflection part 1 and then reflected to the second reflection mirror groups 4 on the second reflection part 2, and continues to be reflected in turn. Finally, the light exits from the light - exit hole / slit 6 located on the second reflection part 2. At this time, the initial incident light and the final exit light are on the same side of the solution.

[0036] As Figure 1bAs shown, the number of the first reflection mirror groups 3 on the first reflection part 1 of the cuvette light reflection component is the same as the number of the second reflection mirror groups 4 provided on the second reflection part 2. After the light enters from the light incident hole / slit 5 on the second reflection part 2, it is reflected by the first reflection mirror groups 3 on the first reflection part 1 and then reflected onto the second reflection mirror groups 4 on the second reflection part 2, and continues to be reflected in turn. Finally, the light exits from the light exit hole / slit 6 located on the first reflection part 1, and the initial incident light and the final exit light are on the opposite sides of the solution.

[0037] In this embodiment, the cuvette light reflection component can be fixedly built into the optical path detection system or designed as an external type such as the form of a cuvette cover.

[0038] Embodiment 2

[0039] As Figure 2a 、 2b As shown, a flow-through cuvette cell and a light emission component for a flow-through optical detection system. The light emission component includes a first reflection part 1, a second reflection part 2, a light incident hole / slit 5, and a light exit hole / slit 6. A plurality of mutually corresponding first reflection mirror groups 3 are provided on the first reflection part 1, and a plurality of mutually corresponding second reflection mirror groups 4 are provided on the second reflection part 2.

[0040] As Figure 2a As shown, a flow-through cuvette cell for a flow-through optical detection system has an outlet and an inlet that penetrate the system to be measured, and the cross-section of the cuvette cell is rectangular. The first reflection part 1 and the second reflection part 2 of the light reflection component are respectively arranged on both sides of the light-transmitting cell wall of the cross-section to be measured of the flow-through cuvette cell. The number of the first reflection mirror groups 3 on the first reflection part 1 of the cuvette cell light reflection component is the same as the number of the second reflection mirror groups 4 provided on the second reflection part 2. After the point light source enters from the light incident hole / slit 5 on the second reflection part 2, it is reflected by the first reflection mirror groups 3 on the first reflection part 1 to the second reflection mirror groups 4 on the second reflection part 2, and continues to be reflected in turn. Finally, the light exits from the light exit hole / slit 6 located on the first reflection part 1, and the initial incident light and the final exit light are on both sides of the solution to be measured.

[0041] As Figure 2b As shown, different from the light emission component for flow-through optical detection shown in Figure 2a the number of the first reflection mirror groups 3 on the first reflection part 1 of this cuvette light reflection component is one more than the number of the second reflection mirror groups 4 provided on the second reflection part 2. Both the light incident hole / slit 5 and the light exit hole / slit 6 are on the second reflection part 2, and the initial incident light and the final exit light are on the same side of the solution.

[0042] The light-emitting component of the present invention can be built into the optical path detection system alone or in multiple sets. When multiple sets are built into the optical path detection system, different optical path lengths can be achieved by rotating the light reflection components corresponding to different pairs. The cross-section of the flow-through cuvette cell can be square, circular, or other shapes, which can be adjusted by those skilled in the art according to actual needs.

[0043] When the system to be measured flows in the flow-through cuvette cell, a concentration change will occur along the liquid flow direction. In the present invention, a first reflection mirror group 3 and a second reflection mirror group 4 are respectively arranged on both sides of the light-transmitting wall of the cuvette cell in a corresponding distribution. When light enters the flow-through cuvette cell at a certain cross-section perpendicular to the solution flow direction and undergoes multiple reflections on the same cross-section, the concentration change can be captured more sensitively, improving the detection sensitivity and accuracy.

[0044] Example 3

[0045] As Figure 3 shown, a light-emitting component for extending the optical path measurement of a microplate reader.

[0046] The first reflection part 1 and the second reflection part 2 of the light reflection component are respectively fixed in the optical path detection system of the microplate reader, on both sides of the solution in the microplate. By moving the microplate, the optical detection of the solutions in different micro-wells in the microplate can be realized.

[0047] In this embodiment, a first reflection mirror group 3 and a second reflection mirror group 4 are respectively arranged on the first reflection part 1 and the second reflection part 2 in a corresponding distribution, so that light can enter perpendicular to the solution direction in the micro-well and then exit perpendicular to the solution direction in the micro-well.

[0048] The light reflection component can be built into the optical path detection system of the microplate reader alone or in multiple sets. By rotating the light reflection components corresponding to different pairs, different optical path lengths can be achieved.

[0049] Example 4

[0050] As Figure 4a and 4b shown, a light-emitting component for extending the optical path measurement of an immersion type full-spectrum detector.

[0051] The first reflection part 1 and the second reflection part 2 of the light reflection component are respectively fixed in the optical path detection system of the immersion type full-spectrum detector, on both sides of the water / aqueous solution to be measured, and are sealed in an optically transparent sealing window. Through the first reflection mirror group 3 and the second reflection mirror group 4 distributed correspondingly, light can enter perpendicular to the water / aqueous solution direction to be measured and then exit perpendicular to the water / aqueous solution.

[0052] The light reflection component can be built into the optical path detection system of the immersion full-spectrum detector in a single set or multiple sets. By rotating the sets of light reflection components corresponding to different pairings, different optical path lengths can be achieved.

[0053] Example 5

[0054] As Figure 5a and 5b shown, a light emission component for gas optical extended optical path detection.

[0055] The first reflection part 1 and the second reflection part 2 of the light reflection component are respectively fixed in the optical path detection system of the gas optical detector, and are located on both sides of the light-transmitting surface of the gas to be measured or its container / cell.

[0056] In this embodiment, first reflection mirror groups 3 and second reflection mirror groups 4 which are correspondingly distributed are respectively arranged on the first reflection part 1 and the second reflection part 2, so that light can enter along the direction perpendicular to the gas to be measured and then exit along the direction perpendicular to the gas to be measured.

[0057] The light reflection component can be located in the gas optical detection optical path system in a single set or multiple sets. By rotating the light reflection components corresponding to different pairings, different optical path lengths can be achieved.

[0058] Example 6

[0059] Figure 6a and 6b are schematic diagrams of the light paths of two combined structures of the present invention; Figure 6a In [a certain situation], the reflection mirror group 3 and the reflection mirror group 4 are staggeredly arranged on both sides of the parallel light-transmitting surface, and the angular bisecting planes of the 90-degree angles of the two reflection mirror groups are parallel. At this time, when light enters from the light incident hole / slit 5 on the second reflection part 2 or is incident by the light exiting from the previous mirror group, after two consecutive reflections by the reflection mirror group 3, it exits onto the reflection mirror group 4, and then after two consecutive reflections by the reflection mirror group 4, it exits onto the first reflection part 1. After multiple reflections like this, the incident light and the exiting light are on the same plane, increasing the optical path of the light in the system to be measured.

[0060] Figure 6b In [another situation], the reflection mirror group 3 and the reflection mirror group 4 are staggeredly arranged on both sides of the light-transmitting surface, and the angular bisecting planes of the 90-degree angles of the two reflection mirror groups are perpendicular to each other. At this time, when light enters from the light incident hole / slit 5 on the second reflection part 2 or is incident by the light exiting from the previous mirror group, after two reflections by the reflection mirror group 3, it exits onto the reflection mirror group 4, and then after two reflections by the reflection mirror group 4, it exits onto the first reflection part 1. After successive reflections through this combined structure, the initial incident light and the final exiting light are on different planes, increasing the optical path of the light in the system to be measured while also converting the direction of the light path.

[0061] Furthermore, the first reflecting mirror group 3 on the first reflecting part 1 and the second reflecting mirror group 4 on the second reflecting part 2 can be set to rotate at different angles around their corresponding incident light axes on a plane parallel to the light-transmitting surface of the system to be measured, so as to change the path of the corresponding outgoing light in the system to be measured, and further extend the optical path range of the initial incident light of the point light source in the system to be measured.

[0062] Embodiment 7

[0063] Figure 7 The figure shows a schematic diagram of one of the optical path for the light-emitting component of the present invention used for a rectangular light-transmitting surface, including a plurality of reflecting mirror group combinations as shown in Figure 6a and 6b The light enters at the position shown by Li and is successively reflected by a plurality of Figure 6a shown combined structures. At this time, the optical path is on a plane. The reflecting mirror group 4 is set in the structure shown in Figure 6b so that the light reflected by the reflecting mirror group 4 is perpendicular to the plane where the previous light is located. With such continuous combination, finally the light can move forward successively along the path trajectory shown by the dotted line in Figure 7

[0064] Furthermore, the reflecting mirror group 3 and the reflecting mirror group 4 can be combined and set to rotate at any angle around their corresponding incident light axes on a plane parallel to the light-transmitting surface of the system to be measured, select the required optical path size within the limited reflection space, and make the reflected optical path present a broken line or arc trajectory. As Figure 8 shown is a schematic diagram of one of the spiral optical paths of the light-emitting component of the present invention on a circular light-transmitting surface. This setting can comprehensively consider the size of the light-transmitting surface of the system to be measured and maximize the optical path of the light in the system to be measured during detection.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.​

Claims

1. An optical emission component for extended optical path measurement of an immersion full-spectrum detector, characterized in that, The optical reflection component includes a first reflection part (1) and a second reflection part (2), and the first reflection part (1) and the second reflection part (2) are respectively arranged on both sides of the system to be measured; the first reflection part (1) includes m groups of first reflection mirror groups (3), and the second reflection part (2) includes n groups of second reflection mirror groups (4), where m is an integer greater than or equal to 1, and n is an integer greater than or equal to 0; the reflection mirror groups of the first reflection mirror group (3) and the second reflection mirror group (4) are each formed by two reflection mirrors intersecting at a 90-degree angle, and the 90-degree angle formed by the two reflection mirrors is oriented towards the system to be measured, and the angle bisecting plane is perpendicular to the system to be measured; The first reflection mirror group (3) of the first reflection part (1) and the second reflection mirror group (4) of the second reflection part (2) are arranged in relative dislocation so that the initial incident light travels successively under the reflection of the first reflection mirror group (3) and the second reflection mirror group (4); A light incident hole / slit (5) and a light exit hole / slit (6) are provided on the optical reflection component, and both the light incident hole / slit (5) and the light exit hole / slit (6) are provided on the second reflection part (2) or respectively on the second reflection part (2) and the first reflection part (1); The first reflection part (1) and the second reflection part (2) of the optical reflection component are respectively fixed in the optical path detection system of the immersion full-spectrum detector, located on both sides of the system to be measured, and are sealed within an optically transparent sealing window.

2. The optical emission component for extended optical path measurement of an immersion full-spectrum detector according to claim 1, characterized in that, The system to be measured can be in a liquid or gaseous form.

3. The optical emission component for extended optical path measurement of an immersion full-spectrum detector according to claim 1, characterized in that, The first reflection mirror group (3) on the first reflection part (1) and the second reflection mirror group (4) on the second reflection part (2) can rotate by different angles around their respective incident lights as the central axes on a plane parallel to the optically transparent sealing window.

4. The optical emission component for extended optical path measurement of an immersion full-spectrum detector according to claim 1 or 2, characterized in that, The optical path length depends on the vertical width of the system to be measured between the first reflection part (1) and the second reflection part (2) and the number of reflections of the light in the system to be measured.

5. The optical emission component for extended optical path measurement of an immersion full-spectrum detector according to claim 1, characterized in that, The optical reflection component can be used either singly or in multiple sets and be internally positioned in the instrument optical path system.

6. The optical emission component for extended optical path measurement of an immersion full-spectrum detector according to claim 4, characterized in that, Multiple sets of optical reflection components internally positioned in the instrument optical path detection system can be selected by manual or automatic means to adapt to different optical path requirements.

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