Light intensity limiting block and fluorescence intensity measuring assembly

Abstract

The utility model provides a light intensity limiting block and a fluorescence intensity measuring assembly, and belongs to the technical field of fluorescence intensity measurement, the light intensity limiting block is provided with a plurality of through holes, and the inner walls of the holes are made of black matte materials. The narrow and long black matte inner wall can absorb stray light, only a small amount of stray light almost parallel to the hole channels can pass through the narrow and long black matte inner wall, and the light intensity limiting block can be applied to a device needing stray light filtering and is particularly suitable for a fluorescence intensity measuring assembly of a fluorometer.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluorescence intensity measurement, and more specifically, relates to a light intensity limiting block and a fluorescence intensity measurement assembly. Background Art

[0002] Certain substances in water (such as upconversion luminescent nanoparticles) will emit fluorescence under the irradiation (excitation) of a light source, which are called fluorescent reagents, and the intensity of fluorescence is proportional to their concentration. Or certain substances in water itself cannot emit fluorescence (such as iron ions), but their presence will cause the fluorescence emitted by the fluorescent reagent to be quenched, and the degree of quenching is proportional to the concentration of the non-fluorescent substance. Therefore, the fluorescent reagent and certain non-fluorescent substances can be quantified by measuring the intensity of the fluorescence emitted by the water sample under the irradiation of the light source. The water sample added with the fluorescent reagent flows through a quartz tube from bottom to top, and the light source emits light of a specific wavelength to excite the fluorescent reagent, and a photovoltaic cell is closely attached to the outer wall of the quartz tube to measure the fluorescence intensity. During the detection process, in addition to detecting fluorescence, the photovoltaic cell will also detect other stray light, which affects the measurement result. How to filter the stray light and improve the measurement accuracy of the photometric detector has become a technical problem in this field. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a light intensity limiting block and a fluorescence intensity measurement assembly aiming at the deficiencies of the prior art, and solve the problem that the measurement of fluorescence intensity in the prior art is greatly affected by stray light.

[0004] To achieve the above purpose, the utility model provides a light intensity limiting block, which is used to be arranged at the input end of a photovoltaic cell for measuring fluorescence intensity. The light intensity limiting block includes a plurality of through holes, and the plurality of holes are arranged in a honeycomb pattern, and the inner wall of at least one of the holes is made of black matte material.

[0005] The light intensity limiting block has a convex portion and a round bottom portion.

[0006] The convex portion is in a saddle shape; the round bottom portion is in a disc shape.

[0007] The number of the holes is 8.

[0008] The diameter of the hole is 1.0 mm.

[0009] The utility model also provides a fluorescence intensity measurement assembly, which is used for the photometric detector of a fluorometer and includes the light intensity limiting block of the utility model.

[0010] The fluorescence intensity measurement assembly further includes a light source, a photovoltaic cell for measuring fluorescence intensity, and a quartz tube through which the water sample flows. The light intensity limiting block is arranged between the photovoltaic cell for measuring fluorescence intensity and the quartz tube.

[0011] There are two photocells for measuring fluorescence intensity. The two photocells for measuring fluorescence intensity are arranged opposite to each other and are both perpendicular to the light source.

[0012] The beneficial effect of the present utility model lies in that: the light intensity limiting block of the present utility model is arranged at the input end of the photocell for measuring fluorescence intensity. It has a plurality of through holes, and the plurality of holes are arranged in a honeycomb pattern. The inner wall of the holes is made of a black matte material. The long and narrow inner wall of the black matte material can absorb stray light, and only a small amount of stray light that is almost parallel to the pore channels can pass through. This light intensity limiting block can be applied to devices that need to filter stray light, and is particularly suitable for the fluorescence intensity measurement component of a fluorometer.

[0013] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0014] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the drawings, the above-mentioned and other objects, features, and advantages of the present utility model will become more obvious. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0015] Figure 1 Fig. shows a schematic structural diagram of a light intensity limiting block according to an embodiment of the present utility model.

[0016] Figure 2 Fig. shows a schematic structural diagram of a fluorescence intensity measurement component according to an embodiment of the present utility model.

[0017] Figure 3 Fig. shows a schematic diagram of a fluorescence intensity measurement component according to an embodiment of the present utility model with the quartz tube removed.

[0018] Description of the Reference Numerals in the Drawings:

[0019] 1. Hole;

[0020] 2. Protrusion;

[0021] 3. Round bottom;

[0022] 4. Fluorescence intensity measurement component; 41. Quartz tube; 42. Light source; 43. Photocell for measuring fluorescence intensity; 44. Photocell for measuring light transmittance intensity. Detailed Description of the Specific Embodiment

[0023] The preferred embodiments of the present utility model will be described in more detail below. Although the preferred embodiments of the present utility model are described below, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present utility model more thorough and complete, and to fully convey the scope of the present utility model to those skilled in the art.

[0024] The present utility model provides a light intensity limiting block, as Figure 1 shown. The light intensity limiting block is used to be arranged at the input end of a photovoltaic cell 43 for measuring fluorescence intensity, and includes a plurality of through holes 1. The plurality of holes 1 are arranged in a honeycomb pattern, and the inner wall of at least one hole 1 is made of a black matte material. Specifically, the long and narrow inner wall made of black matte material can absorb stray light, and only a small amount of stray light almost parallel to the pore channel can pass through. The light intensity limiting block is applicable to devices that need to filter stray light.

[0025] Furthermore, the light intensity limiting block has a convex portion 2 and a round bottom portion 3. Specifically, the round bottom portion 3 is used to connect with the photovoltaic cell 43 for measuring fluorescence intensity of the fluorescence intensity measuring assembly 4, and the convex portion 2 is used to connect with the quartz tube 41 of the fluorescence intensity measuring assembly 4.

[0026] Furthermore, the convex portion 2 is in a saddle shape; the round bottom portion 3 is in a disc shape. In this embodiment, the convex portion 2 is 2.7 mm high, 7.3 mm long, and 3 mm wide; the thickness of the round bottom portion is 2.3 mm, and the diameter is 12.4 mm. This shape and size are applicable to the fluorescence intensity measuring assembly 4 of a fluorometer. The saddle-shaped convex portion 2 can better fit with the quartz tube 41, and its long axis direction is consistent with the axial direction of the quartz tube to obtain more light intensity signals. The disc-shaped round bottom portion 3 can better fit with the photovoltaic cell 43 for measuring fluorescence intensity. When applied to other devices, it can also be set according to actual situations.

[0027] Furthermore, the number of holes 1 is 8. Specifically, this quantity is applicable to the fluorescence intensity measuring assembly 4 of a fluorometer. When applied to other devices, it can be set according to actual situations.

[0028] Furthermore, the diameter of the holes 1 is 1.0 mm. Specifically, this size is applicable to the fluorescence intensity measuring assembly 4 of a fluorometer. When applied to other devices, it can be set according to actual situations.

[0029] As Figure 2 、 3 shown, the present utility model also provides a fluorescence intensity measuring assembly 4 for a photometric detector of a fluorometer, including the light intensity limiting block of the present utility model. The light intensity limiting block of this photometric detector can filter stray light, can improve the linear range and signal-to-noise ratio of quantitative concentration using fluorescence intensity, and thus improve the detection accuracy of the photometric detector.

[0030] Further, the fluorescence intensity measurement component 4 further includes a light source 42, a photocell 43 for measuring the fluorescence intensity, and a quartz tube 41 through which the water sample flows. The light intensity limiting block is disposed between the photocell 43 for measuring the fluorescence intensity and the quartz tube 41. Specifically, the water sample added with the fluorescent reagent flows through the quartz tube 41 from bottom to top. The light source 42 emits light of a specific wavelength to excite the fluorescent reagent, the photocell 43 for measuring the fluorescence intensity measures the fluorescence intensity, and the light intensity limiting block filters stray light.

[0031] Optionally, the fluorescence intensity measurement component 4 further includes a photocell 44 for measuring the light transmittance intensity, and the photocell 44 for measuring the light transmittance intensity is disposed opposite to the light source 42.

[0032] Further, there are two photocells 43 for measuring the fluorescence intensity. The two photocells 43 for measuring the fluorescence intensity are disposed opposite to each other and are both perpendicular to the light source 42. Specifically, the two photocells 43 for measuring the fluorescence intensity respectively measure two directions perpendicular to the light source 42.

[0033] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments.

Claims

1. A light intensity limiting block, used to be arranged at the input end of a photocell (43) for measuring fluorescence intensity, characterized in that: The light intensity limiting block comprises a plurality of through holes (1), the plurality of holes (1) being arranged in a honeycomb shape, and the inner wall of at least one of the holes (1) being made of a black matte material.

2. A light intensity limiting block according to claim 1, characterized in that: The light intensity limiting block has a protruding portion (2) and a round bottom portion (3).

3. A light intensity limiting block according to claim 2, characterized in that: The raised portion (2) is saddle-shaped; the round bottom portion (3) is disc-shaped.

4. The light intensity limiting block according to claim 1, characterized in that: There are 8 holes (1).

5. The light intensity limiting block according to claim 1, characterized in that: The diameter of the hole (1) is 1.0 mm.

6. A fluorescence intensity measurement assembly, used for a photometric detector of a fluorometer, comprising the light intensity limiting block according to any one of claims 1 to 5.

7. The fluorescence intensity measurement assembly according to claim 6, characterized in that: It also comprises a light source (42), a photocell (43) for measuring the fluorescence intensity, and a quartz tube (41), wherein the light intensity limiting block is arranged between the photocell (43) for measuring the fluorescence intensity and the quartz tube (41).

8. The fluorescence intensity measurement assembly according to claim 7, characterized in that: There are two photocells (43) for measuring the fluorescence intensity. The two photocells (43) for measuring the fluorescence intensity are arranged opposite to each other and are both perpendicular to the light source (42).

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