Optical measurement device for microbial species detection

Abstract

The utility model discloses an optical measuring device for microorganism species detection, which comprises a shading shell, a laser, a light-transmitting vessel, a receiving telescope, a detection substrate and a single-photon detector, the shading shell is internally provided with an accommodating cavity, and the laser, the light-transmitting vessel, the receiving telescope, the detection substrate and the single-photon detector are sequentially arranged along a first direction of the accommodating cavity; wherein the laser is configured to emit a laser beam signal; detected microorganisms are placed in the light-transmitting vessel; the receiving telescope is configured to be used for receiving a laser beam signal passing through the light-transmitting vessel; the detection substrate is configured to detect and distinguish polarization of a laser beam signal; and the single-photon detector is configured to detect the laser beam signal output by the substrate, perform optical chromatography treatment to obtain a microorganism sample Mueller matrix, and determine the microorganism species according to the obtained microorganism sample Mueller matrix. The detection device is rapid in detection, high in accuracy, low in cost and rapid and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of microbial detection, in particular to an optical measuring device for detecting microbial species. Background Art

[0002] Microbial species detection holds significant significance in fields such as medicine, food safety, the environment, and microbiology research. In medicine, it's crucial for diagnosing diseases. Testing clinical samples can identify pathogens, helping doctors determine the cause and develop treatment plans. Understanding microbial species and drug susceptibility allows for the rational use of antibiotics, reducing drug-resistant bacteria, improving efficacy, lowering costs, and alleviating patient suffering. It can monitor hospital-acquired infections and test relevant specimens to safeguard the health of both doctors and patients. It also aids in disease prevention by detecting changes in the human microbiome and predicting risks. For example, gut microbiome testing allows for adjustments and maintenance through diet and probiotics. In food safety, microbial testing ensures food quality and safety, preventing food poisoning and intestinal illnesses, and assessing processing environments to identify issues, improve processes, strengthen management, ensure source safety, and promote trade. In environmental science, testing water, soil, and air microbes can assess environmental quality. For example, exceeding microbial limits in water can indicate contamination, and changes in these microbes can serve as indicator organisms. Long-term monitoring can identify pollution incidents, trace the source, and guide remediation. In microbiology research, testing contributes to understanding biodiversity, discovering new species and genetic resources, and promoting technological development.

[0003] Existing microbial species detection technologies have disadvantages such as being time-consuming, limited in accuracy, high in cost, and requiring high technical skills from personnel, which affect the detection effect. Summary of the Invention

[0004] In response to the problems and needs raised above, this solution proposes an optical measurement device for detecting microbial species. Due to the adoption of the following technical features, it can achieve the above technical objectives and bring about many other technical effects.

[0005] The purpose of the utility model is to provide an optical measurement device for detecting microbial species, comprising: a light-shielding housing with an accommodating cavity provided therein, characterized in that the optical measurement device for detecting microbial species further comprises: a laser, a light-transmitting vessel, a receiving telescope, a detection substrate, and a single-photon detector arranged in sequence along a first direction of the accommodating cavity; wherein,

[0006] The laser is configured to emit a laser beam signal;

[0007] The microorganisms to be detected are placed inside the light-transmitting container;

[0008] The receiving telescope is configured to receive the laser beam signal passing through the light-transmitting vessel;

[0009] The detection substrate is configured to detect and resolve the polarization of the laser beam signal;

[0010] The single-photon detector is configured to detect the laser beam signal output by the substrate and perform optical tomography processing to obtain a Mueller matrix of the microbial sample, and determine the type of microorganism according to the obtained Mueller matrix of the microbial sample.

[0011] In this technical solution, a laser beam signal is emitted by a laser, which then passes through a light-transmitting vessel and is received by a receiving telescope. The detection substrate then detects and resolves the polarization of the laser beam signal. Finally, the single-photon detector performs optical tomography processing on the laser beam signal output by the detection substrate to obtain a Mueller matrix of the microbial sample, and the type of microorganism is determined based on the obtained Mueller matrix of the microbial sample. The detection device has rapid detection, high accuracy, low cost, and is quick and convenient to operate.

[0012] In addition, the optical measuring device for detecting microbial species according to the present invention may also have the following technical features:

[0013] In one example of the present invention, it further includes: a collimator, which is provided between the laser and the light-transmitting vessel and is configured to collimate and adjust the laser beam signal.

[0014] In one example of the present invention, it further includes: a polarization modulator, which is arranged between the laser and the light-transmitting vessel and is configured to polarize the laser beam signal.

[0015] In one example of the present invention, it also includes: a data acquisition card for storing the Mueller matrix of microorganisms of known types, which is coupled to the single-photon detector and configured to compare when the single-photon detector obtains the Mueller matrix of a microbial sample with the Mueller matrix of the known type of microorganisms in the data acquisition card, so as to determine the type of the microbial sample.

[0016] In one example of the present invention, the present invention further includes: a first lifting bracket,

[0017] It is arranged at the lower end of the laser and is configured to adjust the height of the laser by lifting and lowering.

[0018] In one example of the present invention, the present invention further includes: an adjustment component, which includes: a second lifting bracket,

[0019] The second lifting bracket is arranged at the lower end of the receiving telescope, the detection substrate and the single-photon detector, and is configured to adjust the height of the receiving telescope, the detection substrate and the single-photon detector simultaneously through lifting and lowering adjustment.

[0020] In one example of the present invention, the adjustment component further includes: an angle adjustment mechanism,

[0021] It is connected to the second lifting bracket and is configured to adjust the angular position of the second lifting bracket in the circumferential direction.

[0022] In one example of the present invention, the angle adjustment mechanism includes:

[0023] an adjusting shaft pivotally connected to the accommodating cavity via a base, and the second lifting bracket is fixedly connected to the adjusting shaft;

[0024] A driven gear fixedly connected to the adjusting shaft;

[0025] a driving gear meshing with the driven gear;

[0026] a driving motor, whose output shaft is engaged with the driving gear and is configured to drive the driving gear to rotate, thereby achieving angle adjustment of the second lifting bracket on the adjustment shaft;

[0027] Wherein, the number of teeth of the driving gear is smaller than the number of teeth of the driven gear.

[0028] In one example of the present invention, it further includes: a controller, which is coupled to the adjustment component and is configured to control and adjust the positions of the receiving telescope, the detection substrate and the single-photon detector in the height direction and the circumferential direction.

[0029] In one example of the present invention, it further includes: a light shield, which is mounted on the outside of the receiving telescope, the detection substrate and the single-photon detector, and is configured to filter stray light and direct strong light in the laser beam passing through the light-transmitting vessel.

[0030] The following will describe the best embodiment of the present invention in more detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to these drawings.

[0032] Figure 1 Schematic diagram of the structure of an optical measurement device for detecting microbial species according to an embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the structure of the aligner according to an embodiment of the present utility model;

[0034] Figure 3 Schematic diagram of the structure of a receiving telescope according to an embodiment of the present utility model;

[0035] Figure 4 This is a control logic diagram of an optical measurement device for detecting microbial species according to an embodiment of the present invention.

[0036] List of reference numerals:

[0037] Light-shielding housing 1;

[0038] Accommodating chamber 1A;

[0039] Laser 2;

[0040] Collimator 3;

[0041] a first convex lens 31;

[0042] First light hole 32;

[0043] First box 33;

[0044] Polarization modulator 4;

[0045] First lifting bracket 5;

[0046] Light-transmitting vessel 6;

[0047] Support frame 7;

[0048] Receiving telescope 8;

[0049] A second convex lens 81;

[0050] Interference filter 82;

[0051] Second light hole 83;

[0052] Second box 84;

[0053] Detection substrate 9;

[0054] Single photon detector 10;

[0055] Sunshade 11;

[0056] Adjustment component 12;

[0057] A second lifting bracket 121;

[0058] Angle adjustment mechanism 122;

[0059] Adjusting shaft 1221;

[0060] Driven gear 1222;

[0061] Driving gear 1223;

[0062] Drive motor 1224;

[0063] Base 1225;

[0064] Abutment 1226;

[0065] Data acquisition card 13;

[0066] Controller 14;

[0067] The first direction X. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not necessarily indicate a quantity limitation. Words such as "include" or "comprising" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0070] According to an optical measuring device for detecting microbial species of the present invention, Figure 1 As shown, it comprises: a light-shielding housing 1, in which a receiving cavity 1A is provided, characterized in that the optical measurement device for detecting microbial species further comprises: a laser 2, a light-transmitting vessel 6, a receiving telescope 8, a detection substrate 9 and a single-photon detector 10 arranged in sequence along a first direction X of the receiving cavity 1A; wherein,

[0071] The laser 2 is configured to emit a laser beam signal; for example, the semiconductor laser 2 has an emission wavelength of 488 nm and a line width of 50 MHz to 100 MHz.

[0072] The microorganisms to be detected are placed inside the light-transmitting container 6; for example, the light-transmitting container 6 is a square structure, all four sides of which are made of highly light-transmitting materials that do not affect the polarization of light, with a light transmittance of 99%. The microorganisms are placed in the solution and then placed in the container.

[0073] The receiving telescope 8 is configured to receive the laser beam signal passing through the light-transmitting vessel 6; specifically, Figure 3 As shown, the receiving telescope 8 includes: a second box 84, two second convex lenses 81 arranged in the second box 84, an interference filter 82 arranged between the two second convex lenses 81, and two second light holes 83 arranged on the second box 84 and close to the two second convex lenses 81, wherein the hole centers of the two second light holes 83, the optical centers of the two second convex lenses 81 and the center of the interference filter 82 are located on the same straight line; for example, a filter is placed in the receiving telescope 8, and the interference filter 82 is an interference filter 82 with a light transmission wavelength of 488nm and a bandwidth of 50MHz-100MHz.

[0074] The detection substrate 9 is configured to detect and resolve the polarization of the laser beam signal; for example, the detection substrate 9 is also an electro-optical modulator, which can resolve light beams including but not limited to horizontal, vertical, 45°, and right-handed circularly polarized light beams.

[0075] The single-photon detector 10 is configured to detect the laser beam signal output by the substrate 9 and perform optical tomography processing to obtain a Mueller matrix of the microbial sample, and to determine the microbial species based on the obtained Mueller matrix of the microbial sample. For example, the quantum efficiency of the single-photon detector 10 is 50%, and its dark count rate is ≤100 / s.

[0076] A laser beam signal is emitted by a laser 2, which then passes through a light-transmitting vessel 6 and is received by a receiving telescope 8. The detection substrate 9 then detects and resolves the polarization of the laser beam signal. Finally, the single-photon detector 10 performs optical tomography processing on the laser beam signal output by the detection substrate 9 to obtain a Mueller matrix of the microbial sample, and the microbial species are determined based on the obtained Mueller matrix of the microbial sample. The detection device has rapid detection, high accuracy, low cost, and is quick and convenient to operate.

[0077] In one example of the present invention, the invention further includes: a collimator 3 , which is provided between the laser 2 and the light-transmitting vessel 6 and is configured to collimate and adjust the laser beam signal;

[0078] Specifically, if Figure 2As shown, the collimator 3 includes a first box body 33, two first convex lenses 31 arranged in the first box body 33, and two first light holes 32 arranged on the first box body 33 and respectively close to the two first convex lenses 31, wherein the optical centers of the two first convex lenses 31 and the hole centers of the two first light holes 32 are located on the same straight line.

[0079] In one embodiment of the present invention, the present invention further includes a polarization modulator 4 disposed between the laser 2 and the light-transmitting vessel 6 and configured to polarize the laser beam signal. For example, the polarization modulator 4 is an electro-optical modulator configured to generate, but not limited to, horizontal, vertical, 45°, and right-handed circularly polarized light. The polarization state can be controlled by a voltage signal, with a polarization degree of 1:10,000.

[0080] In one example of the present invention, it also includes: a data acquisition card 13 for storing the Mueller matrix of microorganisms of known types, which is coupled to the single-photon detector 10 and is configured to compare when the single-photon detector 10 obtains the Mueller matrix of a microbial sample with the Mueller matrix of the known type of microorganism in the data acquisition card 13, so as to determine the type of the microbial sample.

[0081] In one example of the present invention, it further includes: a first lifting bracket 5,

[0082] It is arranged at the lower end of the laser 2 and is configured to adjust the height of the laser 2 by lifting and lowering.

[0083] For example, the first lifting bracket 5 includes: a first telescopic member and a first support plate fixedly connected to the upper end of the first telescopic member, and the height adjustment of the first support plate is achieved through the telescopic movement of the first telescopic member.

[0084] For another example, the first telescopic member is one of a hydraulic cylinder, a pneumatic cylinder, and an electric push rod;

[0085] It is understandable that in order to improve the supporting stability of the first lifting bracket 5, multiple first telescopic members can be set at the lower end of the first support plate, and the height of the first support plate can be adjusted through the synchronous telescopic movement of the multiple first telescopic members.

[0086] In one example of the present invention, the adjustment assembly 12 is further included, which includes a second lifting bracket 121,

[0087] The second lifting bracket 121 is provided at the lower end of the receiving telescope 8 , the detection substrate 9 and the single-photon detector 10 , and is configured to simultaneously adjust the heights of the receiving telescope 8 , the detection substrate 9 and the single-photon detector 10 by lifting and lowering.

[0088] For example, the second lifting bracket 121 includes: a second telescopic member and a second support plate fixedly connected to the upper end of the second telescopic member. The height adjustment of the second support plate is achieved through the telescopic movement of the second telescopic member. The receiving telescope 8, the detection base 9 and the single-photon detector 10 are fixedly arranged on the second support plate in sequence.

[0089] For another example, the second telescopic member is one of a hydraulic cylinder, a pneumatic cylinder, and an electric push rod;

[0090] It is understandable that in order to improve the supporting stability of the second lifting bracket 121, multiple second telescopic members can be set at the lower end of the second support plate, and the height of the second support plate can be adjusted through the synchronous telescopic movement of the multiple second telescopic members.

[0091] Preferably, a support frame 7 is provided at the lower end of the light-transmitting vessel 6 , configured to support the light-transmitting vessel 6 .

[0092] The first lifting bracket 5 and the second lifting bracket are adjusted to adapt to the height of the support frame 7. Of course, the support frame 7 here can also be a lifting structure.

[0093] For example, the support frame 7 may include: a third telescopic member and a third support plate fixedly connected to the upper end of the third telescopic member, wherein the height of the third support plate is adjusted by the telescopic movement of the third telescopic member, and the light-transmitting container 6 is fixedly arranged on the third support plate;

[0094] For another example, the third telescopic member is one of a hydraulic cylinder, a pneumatic cylinder, and an electric push rod;

[0095] It is understandable that in order to improve the support stability of the support frame 7, multiple third telescopic members can be set at the lower end of the third support plate, and the height of the third support plate can be adjusted through the synchronous telescopic movement of the multiple third telescopic members.

[0096] In one example of the present invention, the adjustment assembly 12 further includes: an angle adjustment mechanism 122,

[0097] It is connected to the second lifting bracket 121 and is configured to adjust the angular position of the second lifting bracket 121 in the circumferential direction.

[0098] In one example of the present invention, the angle adjustment mechanism 122 includes:

[0099] The adjusting shaft 1221 is pivotally connected to the accommodating chamber 1A via a base, and the second lifting bracket 121 is fixedly connected to the adjusting shaft 1221; for example, two bases are set in the accommodating chamber 1A, and the adjusting shaft 1221 is pivotally connected to the base via a bearing.

[0100] A driven gear 1222 is fixedly connected to the adjusting shaft 1221;

[0101] a driving gear 1223 meshing with the driven gear 1222;

[0102] The driving motor 1224, whose output shaft is engaged with the driving gear 1223, is configured to drive the driving gear 1223 to rotate, thereby realizing the angle adjustment of the second lifting bracket 121 on the adjustment shaft 1221; for example, in order to facilitate the connection between the driving motor 1224 and the accommodating chamber 1A, and to facilitate the height coordination between the driven gear 1222 and the driving gear 1223, a base 1226 can be set at the lower end of the driving motor 1224 according to actual design requirements.

[0103] The number of teeth of the driving gear 1223 is smaller than that of the driven gear 1222 .

[0104] That is to say, when adjusting the angle, the driving motor 1224 drives the driving gear 1223 to rotate, the driving gear 1223 drives the driven gear 1222 engaged with it to rotate, and then the driven gear 1222 drives the adjustment shaft 1221 fixedly connected to it to rotate. Since the second lifting bracket 121 is fixedly connected to the adjustment shaft 1221, the second lifting bracket 121 can achieve circumferential angle adjustment, and then the receiving telescope 8, detection substrate 9 and single-photon detector 10 located on the second lifting bracket can be adjusted.

[0105] The adjustment component 12 can adjust the position and angle of each component in three-dimensional space, with a rotation angle of 0-90°, to detect scattered light signals at different angles.

[0106] In one example of the present invention, Figure 4 As shown, it also includes: a controller 14, which is coupled to the adjustment component 12 and is configured to control and adjust the positions of the receiving telescope 8, the detection substrate 9 and the single photon detector 10 in the height direction and the circumferential direction;

[0107] Specifically, the controller 14 is coupled to the first lifting bracket 5 and is configured to control the lifting and lowering adjustment of the first lifting bracket 5; the controller 14 is coupled to the adjustment component 12 (including the second lifting bracket 121 and the angle adjustment mechanism 122), and is configured to adjust the height of the second lifting bracket 121 and the rotation angle of the angle adjustment mechanism 122, thereby adjusting the height and rotation angle of the receiving telescope 8, the detection substrate 9 and the single-photon detector 10 to more accurately adapt to the laser beam; the controller 14 is coupled to the single-photon detector 10, The single-photon detector 10 is configured to compare the Mueller matrix of the microorganism sample with the Mueller matrix of the known type of microorganism in the data acquisition card 13 when obtaining the Mueller matrix of the microorganism, so as to determine the type of the microorganism sample; the controller 14 is coupled to the laser 2 and is configured to control the laser 2 to emit a laser beam signal; the controller 14 is coupled to the detection substrate 9 and is configured to control the detection substrate 9 to detect and resolve the polarization of the laser beam signal; the controller 14 is coupled to the polarization modulator 4 and is configured to cause the laser beam signal to produce a change in polarization state by controlling the voltage signal.

[0108] Before using the measuring device, the controller 14 controls the heights of the first lifting bracket 5 and the second lifting bracket 121 respectively, so that the laser 2, the collimator 3, the polarization modulator 4, the light-transmitting vessel 6, the receiving telescope 8, the detection substrate 9 and the single-photon detector 10 are located on the same horizontal line; then the controller 14 controls the laser 2 to emit a laser beam signal, and then the collimator 3 performs collimation adjustment on the laser beam signal. Then the laser beam signal passes through the light-transmitting vessel 6 and is received by the receiving telescope 8. Then the controller 14 controls the detection substrate 9 to detect and resolve the polarization of the laser beam signal. Finally, the controller 14 controls the single-photon detector 10 to perform optical tomography processing on the laser beam signal output by the detection substrate 9 to obtain a Mueller matrix of the microbial sample, and compares it with the Mueller matrix of a known type of microorganism stored in the data acquisition card 13, so as to determine the type of the microbial sample. The obtained Mueller matrix of the microbial sample determines the type of microorganism. The detection device has rapid detection, high accuracy, low cost, and quick and convenient operation.

[0109] In one example of the present invention, it further includes: a light shield 11, which is mounted outside the receiving telescope 8, the detection substrate 9 and the single-photon detector 10, and is configured to filter stray light and direct strong light in the laser beam passing through the light-transmitting vessel 6.

[0110] The exemplary implementation of the optical measuring device for detecting microbial species proposed in the present invention is described in detail above with reference to the preferred embodiments. However, it will be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various combinations of the various technical features and structures proposed in the present invention can be made without exceeding the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. An optical measurement device for detecting microbial species, comprising: A light-shielding housing (1) is provided with a housing (1A) therein, wherein the optical measuring device for detecting microbial species further comprises: a laser (2), a light-transmitting vessel (6), a receiving telescope (8), a detection substrate (9), and a single-photon detector (10) arranged in sequence along a first direction (X) of the housing (1A); wherein, The laser (2) is configured to emit a laser beam signal; The microorganisms to be detected are placed inside the light-transmitting container (6); The receiving telescope (8) is configured to receive the laser beam signal passing through the light-transmitting vessel (6); The detection substrate (9) is configured to detect and resolve the polarization of the laser beam signal; The single-photon detector (10) is configured to detect the laser beam signal output by the substrate (9), perform optical tomography processing to obtain a Mueller matrix of the microorganism sample, and determine the type of microorganism based on the obtained Mueller matrix of the microorganism sample.

2. The optical measuring device for detecting microorganism species according to claim 1, characterized in that: It also includes a collimator (3) which is arranged between the laser (2) and the light-transmitting vessel (6) and is configured to collimate and adjust the laser beam signal.

3. The optical measuring device for detecting microorganism species according to claim 1 or 2, characterized in that: It also includes a polarization modulator (4), which is arranged between the laser (2) and the light-transmitting vessel (6) and is configured to cause the laser beam signal to generate polarization.

4. The optical measuring device for detecting microorganism species according to claim 1, characterized in that: The invention also includes: a data acquisition card (13) for storing the Mueller matrix of microorganisms of known types, which is coupled to the single-photon detector (10) and configured to compare the Mueller matrix of a microorganism sample obtained by the single-photon detector (10) with the Mueller matrix of the microorganisms of known types in the data acquisition card (13) to determine the type of the microorganism sample.

5. The optical measuring device for detecting microorganism species according to claim 1, characterized in that: It also includes: a first lifting bracket (5), It is arranged at the lower end of the laser (2) and is configured to adjust the height of the laser (2) by lifting and lowering.

6. The optical measuring device for detecting microorganism species according to claim 1, characterized in that: It also includes: an adjustment component (12), which includes: a second lifting bracket (121), The second lifting bracket (121) is arranged at the lower end of the receiving telescope (8), the detection substrate (9) and the single-photon detector (10), and is configured to simultaneously adjust the heights of the receiving telescope (8), the detection substrate (9) and the single-photon detector (10) through lifting and lowering adjustment.

7. The optical measuring device for detecting microorganism species according to claim 6, characterized in that: The adjustment assembly (12) further includes: an angle adjustment mechanism (122), It is connected to the second lifting bracket (121) and is configured to adjust the angular position of the second lifting bracket (121) in the circumferential direction.

8. The optical measuring device for detecting microorganism species according to claim 7, characterized in that: The angle adjustment mechanism (122) comprises: An adjusting shaft (1221) is pivotally connected to the accommodating cavity (1A) via a base, and the second lifting bracket (121) is fixedly connected to the adjusting shaft (1221); A driven gear (1222) is fixedly connected to the adjusting shaft (1221); a driving gear (1223) meshing with the driven gear (1222); a driving motor (1224), the output shaft of which is meshed with the driving gear (1223), and configured to drive the driving gear (1223) to rotate, thereby achieving angle adjustment of the second lifting bracket (121) on the adjustment shaft (1221); The number of teeth of the driving gear (1223) is smaller than the number of teeth of the driven gear (1222).

9. The optical measuring device for detecting microorganism species according to claim 7, characterized in that: The invention also includes a controller (14) coupled to the adjustment component (12) and configured to control and adjust the positions of the receiving telescope (8), the detection substrate (9) and the single photon detector (10) in the height direction and the circumferential direction.

10. The optical measuring device for detecting microorganism species according to claim 1, characterized in that: It also includes a light shield (11), which is sleeved on the outside of the receiving telescope (8), the detection substrate (9) and the single-photon detector (10), and is configured to filter stray light and direct strong light in the laser beam passing through the light-transmitting vessel (6).

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