Multiband integrated optical detection system

Abstract

The utility model relates to a multiband integrated optical detection system which comprises a composite light source box, and a transverse light channel, a light outlet channel and a plurality of longitudinal light channels are formed in the composite light source box. A light source is arranged in a first end of the longitudinal light channel, and a second end of the longitudinal light channel is communicated with the transverse light channel; optical filters with different wavelengths are transversely arranged in the longitudinal optical channels, two-way sight glasses are arranged at the joints of the longitudinal optical channels and the transverse optical channels, and the reflecting surfaces of the two-way sight glasses and the corresponding optical filters are obliquely arranged at 45 degrees; and one end of the transverse light channel is communicated with the light outlet channel. The optical filters with different wavelengths are integrated in the composite light source box, and each optical filter corresponds to one light source and one two-way sight glass, so that the incident light with different wavelengths can be switched only by controlling the corresponding light source to start without the assistance of a movement mechanism, the structure is simple, the switching speed is high, the failure rate is low, and the repetition precision is high.

Description

Technical Field

[0001] The utility model relates to the field of detection equipment, and more specifically, to a multi-band integrated optical detection system. Background Art

[0002] For different biochemical or immune detection indicators, different wavelengths of light are needed to illuminate and detect the sample. In the prior art, multiple filters of different wavelengths are generally fixed on a spectroscopic wheel, and the spectroscopic wheel is driven to rotate by a filter switching motor so that the specified filter is switched to a position corresponding to the light source outlet, thereby obtaining irradiation light of different wavelengths. For example, the Chinese patent with publication number CN213813639U proposes a multifunctional POCT detection device, including an optical detection mechanism, the optical detection mechanism includes a light source module, an optical fiber, and an optoelectronic acquisition processing module, the light source module includes a light source and a spectroscopic module, the spectroscopic module includes a filter switching motor and a spectroscopic wheel, the spectroscopic wheel is arranged on one side of the light source outlet, and the spectroscopic wheel is provided with multiple slots for placing filters of different wavelengths, the filter switching motor is used to drive the spectroscopic wheel to rotate so that the specified filter is switched to a position corresponding to the light source outlet, and the incident port of the optical fiber is aligned with the projection position on the spectroscopic wheel.

[0003] The above optical detection mechanism switches the filter by driving the spectroscopic wheel to rotate through the filter switching motor. The switching error is large, the repeatability is poor, the efficiency is low, and the structure is complex.

[0004] Therefore, the prior art has a large room for improvement. Utility Model Content

[0005] The purpose of the utility model is to make up for the deficiencies of the prior art and to propose a multi-band integrated optical detection system.

[0006] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0007] The utility model provides a multi-band integrated optical detection system, comprising a composite light source box, wherein a transverse light channel, a light output channel and a plurality of longitudinal light channels are formed in the composite light source box; a light source is arranged in the first end of the longitudinal light channel, and the second end of the longitudinal light channel is communicated with the transverse light channel; a plurality of longitudinal light channels are each transversely provided with a filter of a different wavelength, a two-way mirror is respectively arranged at the connection between the plurality of longitudinal light channels and the transverse light channels, and a reflective surface of the two-way mirror is arranged to be inclined at 45 degrees with the corresponding filter; and one end of the transverse light channel is communicated with the light output channel.

[0008] Through the above-mentioned structural setting, when a light source of a specific wavelength is needed, the light source corresponding to the specific wavelength filter is controlled to start, and other light sources are extinguished. The light emitted by the light source transmits only the light of a specific wavelength after passing through the filter, and then irradiates the reflection surface of the corresponding two-way mirror. After being reflected by it, the light is sequentially transmitted through other two-way mirrors located in front in a direction parallel to the horizontal light channel, and then incident on the light output channel. To switch the incident light of different wavelengths, it is only necessary to control the corresponding light source to start, without the assistance of the motion mechanism, with a simple structure, fast switching speed, low failure rate, and high repetition accuracy.

[0009] It is understandable that the number of the filters is the same as that of the light sources, longitudinal light channels, and dichroic mirrors, and the number can be set according to actual needs. The wavelength of the filter is set according to actual needs, such as 340nm, 405nm, 505nm, 546nm, 578nm, 630um, 660nm, 700nm, etc. One side of the dichroic mirror is a reflective surface, and the other side is a refractive surface; when the light enters the dichroic mirror from the refractive surface, it is directly refracted and penetrated, which is equivalent to direct transmission without basically changing the transmission direction. Those skilled in the art can set multiple longitudinal light channels on the same side of the transverse light channel according to actual needs, and also set them alternately on the upper and lower sides of the transverse light channel, and the utility model does not limit it.

[0010] According to the above solution, a first condensing lens is horizontally disposed at one end of the light output channel close to the transverse light channel, and the other end is connected to the optical fiber through a first optical fiber interface.

[0011] The first condensing lens is provided to converge the light into parallel light, which is beneficial to improving the utilization rate of light; the focused light is transmitted through the optical fiber.

[0012] According to the above scheme, a longitudinal light detection channel is also provided in the composite light source box, a photodiode is provided in the first end of the longitudinal light detection channel, the longitudinal light detection channel is directly connected to the longitudinal light channel closest to the light exit channel through a transverse light channel, and the reflectivity of the two-way mirror located between the longitudinal light detection channel and the longitudinal light channel closest to the light exit channel is not greater than 75%.

[0013] Through the above-mentioned structural setting, when the light source irradiates the two-way mirror closest to the light output channel, part of the light is reflected and then incident on the light output channel in a direction parallel to the transverse light channel; part of the light enters the longitudinal light detection channel and irradiates the photodiode, and then the light source signal intensity can be calculated.

[0014] According to the above scheme, it also includes a detection frame, which includes a box body, a top plate and a side plate, and the box body and the side plate are fixed to the bottom of the top plate to form a receiving groove for receiving the sample to be tested; the optical fiber is fixed to the box body through a second optical fiber interface, and the optical fiber transmits light to the box body and then emits it from the first light outlet on the box body; a second light outlet is opened on the side plate, and the first light outlet and the second light outlet are arranged opposite to each other and distributed on both sides of the receiving groove, and a colorimetric signal receiving board corresponding to the second light outlet is fixed on the side plate.

[0015] Through the above-mentioned structural setting, the sample to be tested is placed in the accommodating groove, and the light emitted from the composite light source is transmitted into the box through the light transmission, and irradiates the sample to be tested from the first light outlet. After the light passes through the sample to be tested, it passes through the second light outlet and is received by the colorimetric signal receiving board, thereby realizing the detection of the sample to be tested.

[0016] According to the above scheme, a reflector and a second focusing lens are arranged in the box. The reflector is fixed in the box by a reflector mounting block. The reflector and the optical fiber are inclined at 45°. The light transmitted by the optical fiber is reflected by the reflector and passes through the second focusing lens to be emitted from the first light outlet.

[0017] The light transmitted by the optical fiber is reflected by arranging a reflector and then emitted in a direction parallel to the first light outlet.

[0018] According to the above solution, a shielding cover is provided on the upper cover of the colorimetric signal receiving board.

[0019] Providing a shielding cover to shield the influence of external light is helpful to improve the detection accuracy.

[0020] According to the above solution, the top plate is fixedly connected to the composite light source box. The above structural arrangement prevents the optical fiber from being pulled when the optical detection system is moved.

[0021] According to the above solution, the composite light source box includes two half shells, and the two half shells are spliced ​​together to form the longitudinal light channel, the transverse light channel, the longitudinal light detection channel and the light output channel.

[0022] According to the above scheme, a first groove for fixing the edge of the filter is provided on the side wall of the longitudinal light channel, and a second groove for fixing the edge of the dichroic mirror is provided on the side wall of the transverse light channel. The first groove and the second groove are formed by splicing the two half shells.

[0023] Through the above-mentioned structural setting, after placing the filter and the dichroic mirror in the first groove and the second groove of one half shell, the other half shell can be assembled to clamp and fix the filter and the dichroic mirror, thereby improving the installation and replacement efficiency of the filter and the dichroic mirror.

[0024] According to the above scheme, the light source is fixed on the PCBA board. The opening and closing of the light source can be controlled by the PCBA board. The number of the PCBA boards can be set according to actual needs. One light source can be set to correspond to one PCBA board, or multiple light sources on the same side can be set on the same PCBA board, which is not limited by the present invention.

[0025] The beneficial effects of the utility model are:

[0026] The utility model sets up a specific structure of a multi-band integrated optical detection system, integrates filters of different wavelengths in a composite light source box, each filter corresponds to a light source and a dichroic mirror, when a light source of a certain specific wavelength is needed, the light source corresponding to the filter of the specific wavelength is controlled to start, and other light sources are extinguished, and the light emitted by the light source only transmits light of a specific wavelength after passing through the filter, and then irradiates the reflecting surface of the corresponding dichroic mirror, and the light is reflected by it and sequentially transmitted through other dichroic mirrors located in front in a direction parallel to the horizontal light channel, so as to be incident on the light output channel; so that when switching incident light of different wavelengths, it is only necessary to control the starting of the corresponding light source, without the assistance of a motion mechanism, and the structure is simple, the switching speed is fast, the failure rate is low, and the repetition accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model;

[0028] Figure 2 It is a schematic diagram of the internal structure of the composite light source box of the utility model;

[0029] Figure 3 It is an exploded schematic diagram of the composite light source box of the utility model.

[0030] In the figure: 1. composite light source box; 11. half shell; 2. transverse light channel; 21. light outlet channel; 211. first focusing lens; 212. first optical fiber connector; 3. longitudinal light channel; 31. light source; 311. PCBA board; 32. filter; 321. first groove; 33. two-way mirror; 331. second groove; 4. longitudinal light detection channel; 41. photodiode; 5. top plate; 6. box; 61. reflector; 611. reflector mounting block; 62. second focusing lens; 7. side plate; 71. second light outlet; 72. colorimetric signal receiving board; 73. shielding cover; 8. accommodating groove. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0032] Figure 1-3As shown, in order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0033] The utility model provides a multi-band integrated optical detection system, comprising a composite light source box 1, wherein a transverse light channel 2, a light outlet channel 21 and a plurality of longitudinal light channels 3 are formed in the composite light source box 1; a light source 31 is arranged in a first end of the longitudinal light channel 3, and a second end of the longitudinal light channel 3 is communicated with the transverse light channel 2; a plurality of longitudinal light channels 3 are each transversely provided with a filter 32 of a different wavelength, and a dichroic mirror 33 is respectively arranged at a connection between the plurality of longitudinal light channels 3 and the transverse light channel 2, and a reflective surface of the dichroic mirror 33 is inclined at 45 degrees with respect to the corresponding filter 32; and one end of the transverse light channel 2 is communicated with the light outlet channel 21.

[0034] Through the above-mentioned structural setting, when a light source 31 of a specific wavelength is needed, the light source 31 corresponding to the specific wavelength filter 32 is controlled to start, and other light sources 31 are extinguished. After the light emitted by the light source 31 passes through the filter 32, only the light of a specific wavelength is transmitted, and then irradiated onto the reflection surface of the corresponding dichroic mirror 33. After being reflected by it, the light is sequentially transmitted through other dichroic mirrors 33 located in front in a direction parallel to the transverse optical channel 2, and then incident on the light output channel 21. To switch the incident light of different wavelengths, it is only necessary to control the corresponding light source 31 to start, without the assistance of the motion mechanism, with a simple structure, fast switching speed, low failure rate, and high repetition accuracy.

[0035] Furthermore, a first condensing lens 211 is disposed horizontally at one end of the light outlet channel 21 close to the transverse light channel 2, and the other end is connected to the optical fiber via a first optical fiber connector 212. The first condensing lens 211 is provided to converge the light into parallel light, which is beneficial to improving the utilization rate of light; and the focused light is transmitted through the optical fiber.

[0036] Furthermore, a longitudinal light detection channel 4 is also provided in the composite light source box 1, a photodiode 41 is provided in the first end of the longitudinal light detection channel 4, the longitudinal light detection channel 4 is directly connected to the longitudinal light channel 3 closest to the light exit channel 21 through the transverse light channel 2, and the reflectivity of the two-way mirror 33 located between the longitudinal light detection channel 4 and the longitudinal light channel 3 closest to the light exit channel 21 is not greater than 75%.

[0037] Through the above-mentioned structural setting, when the light source 31 irradiates the two-way mirror 33 closest to the light output channel 21, part of the light is reflected and then incident on the light output channel 21 in a direction parallel to the transverse light channel 2; part of the light enters the longitudinal light detection channel 4 and irradiates the photodiode 41, and then the signal intensity of the light source 31 can be calculated.

[0038] Furthermore, it also includes a detection frame, which includes a box body 6, a top plate 5 and a side plate 7, and the box body 6 and the side plate 7 are fixed to the bottom of the top plate 5 to form a receiving groove 8 for receiving the sample to be tested; the optical fiber is fixed to the box body 6 through a second optical fiber connector, and the optical fiber transmits the light to the box body 6 and then emits it from the first light outlet on the box body 6; a second light outlet 71 is opened on the side plate 7, and the first light outlet and the second light outlet 71 are arranged opposite to each other and are distributed on both sides of the receiving groove 8, and a colorimetric signal receiving board 72 corresponding to the second light outlet 71 is fixed on the side plate 7.

[0039] Through the above-mentioned structural setting, the sample to be tested is placed in the accommodating groove 8, and the light emitted from the composite light source 31 is transmitted to the box body 6 through the light transmission, and irradiates the sample to be tested from the first light outlet. After the light passes through the sample to be tested, it passes through the second light outlet 71 and is received by the colorimetric signal receiving board 72, thereby realizing the detection of the sample to be tested.

[0040] Furthermore, a reflector 61 and a second condenser lens 62 are provided in the box 6. The reflector 61 is fixed in the box 6 by a reflector mounting block 611. The reflector 61 is inclined at 45° with the optical fiber. The light transmitted by the optical fiber is reflected by the reflector 61 and then passes through the second condenser lens 62 and is emitted from the first light outlet. The reflector 61 is provided to reflect the light transmitted by the optical fiber and then emit it in a direction parallel to the first light outlet.

[0041] The colorimetric signal receiving board 72 is covered with a shielding cover 73. The shielding cover 73 is used to shield the influence of external light, which is conducive to improving the detection accuracy.

[0042] The top plate 5 is fixedly connected to the composite light source box 1. The above-mentioned structural arrangement can prevent the optical fiber from being pulled when the optical detection system is moved.

[0043] Furthermore, the composite light source box 1 includes two half shells 11, and the two half shells 11 are assembled to form the longitudinal light channel 3, the transverse light channel 2, the longitudinal light detection channel 4 and the light output channel 21. A first groove 321 for fixing the edge of the filter 32 is provided on the side wall of the longitudinal light channel 3, and a second groove 331 for fixing the edge of the dichroic mirror 33 is provided on the side wall of the transverse light channel 2. The first groove 321 and the second groove 331 are formed by the two half shells 11 being assembled.

[0044] Through the above-mentioned structural setting, after the filter 32 and the dichroic mirror 33 are placed in the first groove 321 and the second groove 331 of one half shell 11, the other half shell 11 can be assembled to clamp and fix the filter 32 and the dichroic mirror 33, thereby improving the installation and replacement efficiency of the filter 32 and the dichroic mirror 33.

[0045] Furthermore, the light source 31 is fixed on the PCBA board 311. The PCBA board 311 can control the opening and closing of the light source 31.

[0046] When the multi-band integrated optical detection system of the utility model is in use, the sample to be tested is placed in the accommodating groove 8. When a certain wavelength of light is needed to illuminate the sample to be tested for detection, the light source 31 corresponding to the filter 32 of the specific wavelength is controlled to start, and other light sources 31 are extinguished. The light emitted by the light source 31 passes through the filter 32 and only transmits light of a specific wavelength, and then irradiates the reflecting surface of the corresponding dichroic mirror 33. After being reflected by it, the light is sequentially transmitted through the other dichroic mirrors 33 located in the front in a direction parallel to the transverse optical channel 2, so as to be incident on the light output channel 21; wherein the light source 31 irradiates the light closest to the light output channel 21. When the two-way mirror 33 of the channel 21 is turned on, part of the light is reflected and then incident on the light output channel 21 in a direction parallel to the horizontal light channel 2; part of the light enters the longitudinal light detection channel 4 and illuminates the photodiode 41, and then the signal intensity of the light source 31 can be calculated; after the light is incident on the light output channel 21, it is focused by the first condensing lens 211 and then transmitted to the box 6 through the light, and the light is reflected by the reflector 61 and passes through the second condensing lens 62 to be emitted from the first light output port to illuminate the sample to be tested, and the light passes through the sample to be tested and then passes through the second light output port 71 and is received by the colorimetric signal receiving board 72, thereby realizing the detection of the sample to be tested.

[0047] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A multi-band integrated optical detection system, characterized in that: It comprises a composite light source box (1), wherein a transverse light channel (2), a light outlet channel (21) and a plurality of longitudinal light channels (3) are formed in the composite light source box (1); A light source (31) is provided in the first end of the longitudinal light channel (3), and a second end of the longitudinal light channel (3) is connected to the transverse light channel (2); A filter (32) with a different wavelength is disposed transversely in each of the plurality of longitudinal light channels (3); a dichroic mirror (33) is disposed at the connection between each of the plurality of longitudinal light channels (3) and the transverse light channel (2); a reflective surface of the dichroic mirror (33) is inclined at 45 degrees to the corresponding filter (32); One end of the transverse light channel (2) is in communication with the light exit channel (21).

2. The multi-band integrated optical detection system according to claim 1, characterized in that: A first condensing lens (211) is disposed transversely at one end of the light outlet channel (21) close to the transverse light channel (2), and the other end is connected to the optical fiber via a first optical fiber connector (212).

3. The multi-band integrated optical detection system according to claim 1, characterized in that: The composite light source box (1) is further provided with a longitudinal light detection channel (4), a photodiode (41) is provided at a first end of the longitudinal light detection channel (4), the longitudinal light detection channel (4) is directly connected to the longitudinal light channel (3) closest to the light exit channel (21) through the transverse light channel (2), and the reflectivity of the two-way mirror (33) located between the longitudinal light detection channel (4) and the longitudinal light channel (3) closest to the light exit channel (21) is not greater than 75%.

4. The multi-band integrated optical detection system according to claim 2, characterized in that: It also includes a detection frame, the detection frame including a box body (6), a top plate (5) and a side plate (7), the box body (6) and the side plate (7) being fixed to the bottom of the top plate (5) so as to form a receiving groove (8) for receiving a sample to be tested; The optical fiber is fixed to the box (6) via a second optical fiber connector, and the optical fiber transmits light to the box (6) and then emits light from a first light outlet on the box (6); The side panel (7) is provided with a second light outlet (71), the first light outlet and the second light outlet (71) are arranged opposite to each other and are located on both sides of the accommodating groove (8), and a colorimetric signal receiving plate (72) corresponding to the second light outlet (71) is fixed on the side panel (7).

5. The multi-band integrated optical detection system according to claim 4, characterized in that: A reflector (61) and a second condensing lens (62) are arranged in the box (6); the reflector (61) is fixed in the box (6) via a reflector mounting block (611); the reflector (61) and the optical fiber are arranged to be inclined at 45 degrees; the light transmitted by the optical fiber is reflected by the reflector (61) and then passes through the second condensing lens (62) and is emitted from the first light outlet.

6. The multi-band integrated optical detection system according to claim 4, characterized in that: The colorimetric signal receiving plate (72) is covered with a shielding cover (73).

7. The multi-band integrated optical detection system according to claim 4, characterized in that: The top plate (5) is fixedly connected to the composite light source box (1).

8. The multi-band integrated optical detection system according to claim 1, characterized in that: The composite light source box (1) comprises two half shells (11), and the two half shells (11) are assembled to form the longitudinal light channel (3), the transverse light channel (2) and the light output channel (21).

9. The multi-band integrated optical detection system according to claim 8, characterized in that: A first groove (321) for fixing the edge of the filter (32) is provided on the side wall of the longitudinal light channel (3), and a second groove (331) for fixing the edge of the dichroic mirror (33) is provided on the side wall of the transverse light channel (2), wherein the first groove (321) and the second groove (331) are formed by splicing the two half shells (11).

10. The multi-band integrated optical detection system according to claim 1, characterized in that: The light source (31) is fixed on the PCBA board (311).

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