Optical module with light shielding structure

Abstract

The utility model provides an optical module with a light shielding structure, which comprises a light shielding shell, a laser channel and a refraction channel communicated with the laser channel are arranged in the light shielding shell, a laser, a two-phase beam splitter and a plano-convex lens are sequentially arranged in the laser channel from top to bottom, and a photomultiplier and a filter lens are arranged in the refraction channel. The two-phase beam splitter is obliquely arranged, and the convex surface of the plano-convex mirror faces the two-phase beam splitter; wherein a shading unit is arranged on one side, close to the two-phase beam splitter, in the refraction channel, and the shading unit is used for closing or opening the refraction channel; the shading unit is an electromagnetic switcher. According to the utility model, the technical problems in the prior art that a very small amount of light enters the photomultiplier due to high laser intensity and incomplete cutoff of the two-phase beam splitter and the optical filter, so that the background of an instrument is too high, the testing performance of the instrument is influenced, a relatively large error exists in a detection result, and the detection precision is influenced can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of biochemical analysis, in particular to an optical module with a light-shielding structure. Background Art

[0002] When performing fluorescent immunoassay, the optical module has a great influence on the accuracy of the detection process; the utility model with application number: CN202221504308.6 discloses an optical module for a fluorescent chromatographic immunoassay analyzer, including a housing, a laser channel and a refraction channel are arranged in the housing, the laser channel is connected to the refraction channel, a light source assembly is arranged in the laser channel, and a dichroic spectroscopic filter is arranged in the refraction channel; a plano-convex cylindrical mirror is also arranged in the refraction channel, the plano-convex cylindrical mirror is located below the dichroic spectroscopic filter, a light transmission hole connected to the refraction channel is arranged on the housing, and a rear sensor is installed on the housing, the sensor is located in the refraction channel and above the dichroic spectroscopic filter, and the plane of the plano-convex cylindrical mirror is opposite to the light transmission hole. In actual use, the utility model can shape the light into a rectangular spot and irradiate it on the test card, and the formed spot area is large, which improves the fluorescence reflection effect and thus improves the detection sensitivity.

[0003] However, in actual use, when the laser component is lit to excite the reagent to emit light, due to the high laser intensity and the incomplete cutoff of the two-phase beam splitter and the filter, a very small amount of light will enter the photomultiplier tube, causing the instrument background to be too high, affecting the instrument test performance, resulting in large errors in the test results and affecting the detection accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide an optical module with a light-shielding structure, which can effectively solve the technical problem in the prior art that due to the high laser intensity and the incomplete cutoff of the two-phase beam splitter and the filter, a very small amount of light will enter the photomultiplier tube, causing the instrument background to be too high, affecting the instrument test performance, resulting in large errors in the test results, and affecting the detection accuracy.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An optical module with a light-shielding structure comprises a light-shielding housing, wherein a laser channel and a refraction channel connected to the laser channel are arranged in the light-shielding housing;

[0007] A laser, a two-phase beam splitter and a plano-convex mirror are arranged in sequence from top to bottom in the laser channel, and a photomultiplier tube and a filter are arranged in the refraction channel. The two-phase beam splitter is arranged obliquely, and the convex surface of the plano-convex mirror faces the two-phase beam splitter.

[0008] Wherein, a shading unit is arranged on one side of the refraction channel close to the two-phase beam splitter, and the shading unit is used to close or open the refraction channel.

[0009] Wherein, the shading unit is an electromagnetic switch.

[0010] Furthermore, the light-proof housing includes a base, a first housing and a second housing, and the first housing and the second housing are both provided with a first mounting groove and a second mounting groove that are interconnected. After the first housing is connected to the second housing, the laser channel is formed at the first mounting groove, and a refraction channel is formed at the second mounting groove; the first housing and the second housing are connected to the base after being interconnected, and the photomultiplier tube is installed on the base, and the end of the photomultiplier tube is located in the refraction channel.

[0011] Preferably, the first and second shells are provided with a first slot and a second slot for inserting a two-phase beam splitter and a plano-convex mirror at the first installation slot position, and the first and second shells are provided with a third slot and a fourth slot for installing a filter and a shading unit at the second installation slot position.

[0012] Furthermore, the first shell and the second shell are connected by bolts or screws.

[0013] Wherein, a sealing strip is arranged between the first shell and the second shell.

[0014] Preferably, both the first shell and the second shell are provided with sealing grooves, and the sealing strip is installed in the sealing grooves.

[0015] As an option, a protrusion is provided on the first shell, and a groove is provided on the second shell. After the first shell and the second shell are buckled together, the protrusion and the groove cooperate with each other.

[0016] Furthermore, a motor is arranged on the base, a slider is connected to the base, the slider is slidably mounted on a support seat on the homogeneous analyzer frame through a slide rail, the motor is connected to a gear, a rack is arranged on the base, and the gear and the rack are meshed with each other.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model can close or open the refraction channel through the shading unit provided, and can close or open the refraction channel according to the need when in use; when entering the detection stage, the shading unit is opened, and the photomultiplier tube will record the ambient light at this time, and then the photomultiplier tube is closed, and the laser is turned on to stimulate the actual luminescence for fluorescence reaction; the laser is turned off, and the shading unit is turned on again, and the photomultiplier tube records the light value at this time, and the luminescence value minus the ambient light value at this time is the reagent luminescence value. The utility model can effectively solve the technical problem that in the prior art, due to the high laser intensity and the incomplete cutoff of the two-phase spectrometer and the filter, a very small amount of light will enter the photomultiplier tube, causing the instrument background to be too high, affecting the instrument test performance, resulting in a large error in the test result, and affecting the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 For this utility model Figure 1 Schematic diagram of the structure after removing the second shell.

[0022] Figure 3 For this utility model Figure 2 main view.

[0023] Figure 4 It is a schematic diagram of the connection relationship between the base and the support base of the utility model.

[0024] Reference numerals:

[0025] 101 light-proof housing, 102 laser channel, 103 refractive channel, 104 laser, 105 two-phase beam splitter, 106 plano-convex mirror, 107 photomultiplier tube, 108 filter, 109 shading unit, 110 base, 111 first housing, 112 second housing, 113 first mounting slot, 114 second mounting slot, 115 first slot, 116 second slot, 117 third slot, 118 fourth slot, 119 sealing strip, 120 motor, 121 slider, 122 slide rail, 123 support seat, 124 gear, 125 rack. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0030] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0032] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0033] See also Figure 1-Figure 4 This embodiment discloses an optical module, specifically an optical module with a light-shielding structure, including a light-shielding housing 101, in which a laser channel 102 and a refraction channel 103 connected to the laser channel 102 are arranged;

[0034] A laser 104, a two-phase beam splitter 105 and a plano-convex mirror 106 are arranged in the laser channel 102 from top to bottom, and a photomultiplier tube 107 and a filter 108 are arranged in the refraction channel 103. The two-phase beam splitter 105 is arranged obliquely, and the convex surface of the plano-convex mirror 106 faces the two-phase beam splitter 105.

[0035] A shading unit 109 is provided in the refraction channel 103 on one side close to the two-phase beam splitter 105 , and the shading unit 109 is used to close or open the refraction channel 103 .

[0036] In this embodiment, the shading unit 109 is an electromagnetic switch.

[0037] In the utility model, the shading unit 109 provided can close or open the refraction channel 103; when entering the detection stage, the shading unit 109 is opened, and the photomultiplier tube 107 will record the ambient light at this time, and then the photomultiplier tube 107 is closed, and the laser 104 is turned on to stimulate the actual luminescence for fluorescence reaction; the laser 104 is turned off, and the shading unit 109 is turned on again, and the photomultiplier tube 107 records the light value at this time, and the luminescence value minus the ambient light value at this time is the reagent luminescence value. The utility model can effectively solve the technical problem that in the prior art, due to the high laser intensity and the incomplete cutoff of the two-phase spectrophotometer 105 and the filter, a very small amount of light will enter the photomultiplier tube 107, causing the instrument background to be too high, affecting the instrument test performance, resulting in a large error in the test result, and affecting the detection accuracy.

[0038] Among them, the light-proof shell 101 includes a base 110, a first shell 111 and a second shell 112. The first shell 111 and the second shell 112 are both provided with a first installation groove 113 and a second installation groove 114 that are interconnected. After the first shell 111 is connected to the second shell 112, the laser channel 102 is formed at the first installation groove 113, and the refraction channel 103 is formed at the second installation groove 114; the first shell 111 and the second shell 112 are connected to each other and then connected to the base 110, and the photomultiplier tube 107 is installed on the base 110, and the end of the photomultiplier tube 107 is located in the refraction channel 103.

[0039] Furthermore, the first and second shells are provided with a first slot 115 and a second slot 116 for inserting the two-phase splitter 105 and the plano-convex mirror 106 at the position of the first installation slot 113, and the first and second shells are provided with a third slot 117 and a fourth slot 118 for installing the filter 108 and the shading unit 109 at the position of the second installation slot 114.

[0040] The first housing 111 and the second housing 112 are connected by bolts or screws.

[0041] In actual use, a sealing strip 119 is provided between the first housing 111 and the second housing 112 ; the provided sealing strip 119 can effectively improve the sealing performance and reduce the influence of ambient light.

[0042] Wherein, sealing grooves are provided on the first shell 111 and the second shell 112, and the sealing strip 119 is installed in the sealing grooves.

[0043] In some preferred implementation cases, a protrusion is provided on the first shell 111, and a groove is provided on the second shell 112. After the first shell 111 and the second shell 112 are buckled together, the protrusion and the groove cooperate with each other.

[0044] Further, in some preferred embodiments, a motor 120 is provided on the base 110, a slider 121 is connected to the base 110, the slider 121 is slidably mounted on a support base 123 on the frame of the homogeneous analyzer through a slide rail 122, a gear 124 is connected to the motor 120, a rack 125 is provided on the base 110, and the gear 124 and the rack 125 are meshed with each other. In this way, the overall structure of the optical module can be moved to achieve the purpose of multi-station detection.

[0045] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical module with a light-shielding structure, comprising a light-shielding housing, wherein a laser channel and a refraction channel connected to the laser channel are arranged in the light-shielding housing, characterized in that: A laser, a two-phase beam splitter and a plano-convex mirror are arranged in sequence from top to bottom in the laser channel, and a photomultiplier tube and a filter are arranged in the refraction channel. The two-phase beam splitter is arranged obliquely, and the convex surface of the plano-convex mirror faces the two-phase beam splitter. Wherein, a shading unit is arranged on one side of the refraction channel close to the two-phase beam splitter, and the shading unit is used to close or open the refraction channel.

2. The optical module with a light-shielding structure according to claim 1, characterized in that: The shading unit is an electromagnetic switch.

3. The optical module with a light-shielding structure according to claim 1, characterized in that: The light-proof housing comprises a base, a first housing and a second housing. The first housing and the second housing are both provided with a first mounting groove and a second mounting groove which are interconnected. After the first housing is connected to the second housing, the laser channel is formed at the first mounting groove, and a refraction channel is formed at the second mounting groove. After the first housing and the second housing are connected to each other, they are connected to the base, a photomultiplier tube is installed on the base, and an end of the photomultiplier tube is located in the refraction channel.

4. The optical module with a light-shielding structure according to claim 3, characterized in that: The first and second shells are provided with a first slot and a second slot for inserting a two-phase beam splitter and a plano-convex mirror at the first installation slot position, and the first and second shells are provided with a third slot and a fourth slot for installing a filter and a shading unit at the second installation slot position.

5. The optical module with a light-shielding structure according to claim 3, characterized in that: The first housing and the second housing are connected by bolts or screws.

6. The optical module with a light-shielding structure according to claim 5, characterized in that: A sealing strip is arranged between the first shell and the second shell.

7. The optical module with a light-shielding structure according to claim 6, characterized in that: The first shell and the second shell are both provided with sealing grooves, and the sealing strips are installed in the sealing grooves.

8. The optical module with a light-shielding structure according to claim 5, characterized in that: The first shell is provided with a protrusion, and the second shell is provided with a groove. After the first shell and the second shell are buckled together, the protrusion and the groove cooperate with each other.

9. The optical module with a light-shielding structure according to claim 2, characterized in that: A motor is arranged on the base, and a slider is connected to the base. The slider is slidably mounted on a support seat on the frame of the homogeneous analyzer through a slide rail. The motor is connected to a gear, and a rack is arranged on the base. The gear and the rack are meshed with each other.

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