Adjustment device for microplate reader, and microplate reader
The adjustment device in the microplate reader allows for precise control of the diaphragm opening size and position, addressing the limitations of existing technologies and enhancing measurement accuracy for both fluorescence and chemiluminescence applications.
Patent Information
- Application Number
- PCT/CN2024/135575
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-12-06
- Filing Date
- 2024-11-29
- Publication Date
- 2025-06-12
AI Technical Summary
Existing microplate readers struggle to adapt effectively for both fluorescence and chemiluminescence measurements due to limitations in diaphragm opening size and position, leading to reduced measurement accuracy from crosstalk and inadequate light transmission.
An adjustment device that allows for the linear proportional change in the hole diameter of the diaphragm opening in conjunction with the axial position of the aperture, enabling precise control and adaptation for different measurement modes.
The solution enhances measurement accuracy by optimizing light transmission during fluorescence measurements and minimizing crosstalk during chemiluminescence measurements, thereby improving the overall performance of the microplate reader.
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Figure CN2024135575_12062025_PF_FP_ABST
Abstract
Description
ADJUSTMENT DEVICE FOR MICROPLATE READER, AND MICROPLATE READERTechnical field
[0001] The present disclosure relates to an adjustment device for a microplate reader, and more specifically to a diaphragm adjustment device for adjusting the size and position of the diaphragm opening to be used for, for example, fluorescence measurement and chemiluminescence measurement functions of the microplate reader. In addition, the present disclosure also relates to a microplate reader including an adjustment device.Background
[0002] Microplate readers can be widely used in the fields such as scientific research and detection such as life sciences. Microplate readers can generally be used in conjunction with microplates. A microplate can be provided with a sample well array including a plurality of sample wells, and each sample well can be provided with a sample to be detected. A microplate reader can detect biological, chemical or physical phenomena of samples provided in sample wells.
[0003] The microplate reader can have a diaphragm or hole, and can support fluorescence measurement and chemiluminescence measurement / determination. When used for fluorescence measurement, in order to improve the detection accuracy, it is expected that more excitation light from the sample enters the hole, while in chemiluminescence measurement, due to the presence of multiple sample wells, the light emitted from adjacent sample wells may enter the hole at the same time, so that there may be crosstalk light from samples in non-measured sample wells, which reduces the measurement accuracy. However, such a microplate reader of the prior art cannot be well adapted to the microplate reader for fluorescence measurement and chemiluminescence measurement in multi-mode.
[0004] Therefore, there is an urgent need to optimize the microplate reader of the prior art. The microplate reader can overcome one or more disadvantages existing in the prior art.Summary
[0005] An objective of the present disclosure is to provide a microplate reader, including an adjustment device that allows the microplate reader to be conveniently used for fluorescence measurements and chemiluminescence measurements / assays. Specifically, the adjustment device can adjust the hole diameter of a diaphragm opening while changing the axial position of an aperture, to meet different requirements of fluorescence measurements and chemiluminescence measurements for the hole diameter and position of the diaphragm opening.
[0006] Another objective of the present disclosure is to optimize a structure of the adjustment device of the microplate reader in order to provide an improved adjustment device.
[0007] Another objective of the present disclosure is to provide an adjustment device for a microplate reader, which allows a change in the hole diameter of a diaphragm opening to be linearly proportional to a change in the axial position of an aperture. In addition, the adjustment device according to the present disclosure can more accurately control the hole diameter of the diaphragm opening, and preferably, the adjustment device also allows a continuous linear change in the hole diameter.
[0008] According to an aspect, the present disclosure provides an adjustment device for a microplate reader. The adjustment device may include: an actuation mechanism that can be connected to a housing of the microplate reader; an adjustable aperture that may include an aperture opening, where the adjustable aperture is driven to move in an axial direction by an actuation mechanism; and a diaphragm opening adjusting member that is configured to be movable relative to the center of the aperture opening so as to define an adjustable diaphragm opening in the adjustable aperture, where the diaphragm opening adjusting member is movable between a first position and a second position as the adjustable aperture moves towards or away from a microplate in the axial direction, and the size of the adjustable diaphragm opening in the first position is greater than the size of the adjustable diaphragm opening in the second position.
[0009] The adjustment device can change the size of the adjustable diaphragm opening while the axial position of the adjustable aperture changes, thereby allowing the microplate reader to be used for fluorescence or chemiluminescence detection. With such an arrangement, the hole diameter (size) and position (e.g., a relative axial position) of the adjustable diaphragm opening or hole through which light passes can be adjusted to adapt to different measurement modes. For example, a multi-mode microplate reader can support both of the fluorescence and luminescence measurements.
[0010] When the microplate reader is used for the fluorescence measurement, it is required to allow a sufficient amount of light to pass through the adjustable diaphragm opening. Preferably, the adjustment device can be positioned to make the hole diameter of the adjustable diaphragm opening or hole approximate or equal the hole diameter of the aperture opening, so as to allow as much light as possible to pass through the adjustable diaphragm opening. When the microplate reader is used for the luminescence measurement, the relative position between the adjustable diaphragm opening or hole and a sample well is closer than in the fluorescence measurement, so as to limit the crosstalk effect caused by interference light from adjacent sample wells. Preferably, the hole diameter of the adjustable diaphragm opening or hole can approximate or equal the hole diameter of the sample well of the microplate.
[0011] Preferably, the actuation mechanism may include a first driving part that is rotatable about a rotation axis and is provided with a first helical portion; and the adjustable aperture is provided with a second helical portion that cooperates with the first helical portion to change a movement of the first driving part in a circumferential direction into the movement of the adjustable aperture in the axial direction.
[0012] In this way, on the basis of the arrangement of the adjustment device according to the present disclosure, a fine change and / or continuous change in the hole diameter of the adjustable diaphragm opening is allowed to further improve the measurement accuracy.
[0013] Preferably, the actuation mechanism may further include an axial guide member that limits the movement of the adjustable aperture in the circumferential direction and allows the movement of the adjustable aperture in the axial direction. By means of such a guide member, it can be ensured that the adjustable aperture moves only in the axial direction without rotating along with the first driving part.
[0014] Preferably, the actuation mechanism may further include a stepper motor and a synchronous belt, where the first driving part may be formed as a synchronous wheel and is driven by the stepper motor by means of the synchronous belt.
[0015] In this way, the first driving part formed as the synchronous wheel and driven by means of the stepper motor can achieve automatic control and improve the accuracy of the synchronous wheel, thereby accurately adjusting a movement distance of the adjustable aperture in the axial direction and the size of the adjustable diaphragm opening. In addition, such a synchronous wheel can further effectively prevent accidental jamming or slipping, and prevent the reduced adjustment accuracy caused by wear of components such as a belt and other factors.
[0016] Preferably, the diaphragm opening adjusting member may be configured such that: as the adjustable aperture moves in a first direction in the axial direction, the adjustable diaphragm opening undergoes a transition to a narrowed state, and as the adjustable aperture moves in a second direction opposite to the first direction in the axial direction, the adjustable diaphragm opening undergoes a transition to an expanded state.
[0017] With such an arrangement, the adjustment device according to the present disclosure can be applied to the microplate reader having a fluorescence measurement mode and a chemiluminescence measurement mode. Preferably, during the fluorescence measurement, the hole diameter of an adjustable diaphragm can approximate the physical limit of the opening size of the aperture opening. Since adjacent wells do not receive excitation light, no crosstalk is caused. Also, a large hole diameter is conducive to a system obtaining more fluorescence, improving the signal-to-noise ratio of measurement. During the luminescence (e.g., chemiluminescence) measurement, the hole diameter cannot be excessively large, otherwise unintended light signals from the adjacent wells would also enter the adjustable diaphragm and then collected by a detector, so that the crosstalk signals affect readings of a display device.
[0018] Preferably, the diaphragm opening adjusting member may include a first adjustment mechanism. The first adjustment mechanism may include: a plurality of driving arms that may each include a radial guide portion and an actuation portion at an angle with the radial guide portion, where the radial guide portion is configured to guide the driving arm to reciprocate in a radial direction or in a direction parallel to the radial direction, and the actuation portion is arranged in a guide groove in a circumferential wall of the adjustable aperture; and a restraint frame that may be arranged around the actuation portion and pushes and abuts, as the adjustable aperture moves in the first direction in the axial direction, against the actuation portion to force the first adjustment mechanism to move towards the second position under the guidance of the radial guide portion.
[0019] By means of the first adjustment mechanism, a change in the axial position of the adjustable aperture is proportional to a change in the size of the adjustable diaphragm opening. In addition, such a structure has a high strength, the adjustable diaphragm opening is expanded or narrowed by means of a combined movement of a frictional force and a spring force between the driving arms and the restraint frame, this movement is relatively simple in form and involves few components, resulting in a straightforward structure and low manufacturing and maintenance costs.
[0020] Preferably, the first adjustment mechanism may further include a first elastic member that is attached to an accommodating portion of the driving arm and biases the first adjustment mechanism towards the first position. In this way, by means of a biasing force of the first elastic member, the driving arm can be automatically reset in the event of removal of an external pushing force, thereby facilitating an adjustment operation and conducing to automatic adjustment.
[0021] Preferably, the diaphragm opening adjusting member may include a second adjustment mechanism. The second adjustment mechanism may include: a plurality of blades that may be arranged around the aperture opening and enclosing the adjustable diaphragm opening, and a first end of each of the plurality of blades is pivotally fixed to the adjustable aperture; and an actuation ring that may be arranged concentrically with the aperture opening and is pivotable around the aperture opening, where a second end, opposite the first end, of each of the plurality of blades is pivotally fixed to the actuation ring, so that the change in the size of the adjustable diaphragm opening is caused as the actuation ring pivots.
[0022] By means of the second adjustment mechanism, the change in the axial position of the adjustable aperture is proportional to the change in the size of the adjustable diaphragm opening, and an axial mounting space can be reduced. Moreover, the adjustment accuracy of such an adjustment mechanism is also relatively high, and the movement of the mechanism is smoother, more fluid and stable due to the application of rotational / rolling friction.
[0023] Preferably, the second adjustment mechanism may further include: a guide piece that remains fixed relative to the housing and has an inclined guide surface; the actuation ring may further include an actuation rod that extends out from a guide opening in the circumferential wall of the adjustable aperture and cooperates with the guide surface, such that as the adjustable aperture moves in the axial direction, the actuation ring can be guided by the guide surface to move in the circumferential direction.
[0024] Such an arrangement allows the actuation rod to be guided by the guide piece to move along the guide surface in an inclination direction while moving in the axial direction, so as to finally achieve a circumferential movement of the actuation ring. Furthermore, the linear proportional relationship between an axial movement distance of the adjustable aperture and the size of the adjustable diaphragm opening can be adjusted by changing the guide piece.
[0025] Preferably, the second adjustment mechanism may further include a second elastic member, the second elastic member is arranged between the actuation rod and the adjustable aperture and biases the second adjustment mechanism towards the second position.
[0026] Similarly, by means of a biasing force of the second elastic member, the actuation rod can be automatically reset when the guide piece moves (e.g., moves upwardly) away from the guide rod, thereby facilitating the adjustment operation and conducing to the automatic adjustment.
[0027] According to another aspect, the present disclosure provides a microplate reader. The microplate reader may include: the adjustment device described in the above aspect and a microplate carrier; the microplate cartier may be configured to carry a microplate including sample well (s) in which sample (s) to be measured is (are) placed, where the adjustable aperture of the adjustment device may be located above the microplate; the microplate reader may further include the detector that is capable of detecting light passing through the adjustable aperture from the sample (s) to be measured.
[0028] Such a microplate reader can simultaneously adjust a distance between the adjustable aperture and the sample well and the sample, as well as the size of the adjustable diaphragm opening, so that the microplate reader can be applied in a variety of measurement application scenarios.
[0029] According to the above aspect of the present disclosure, preferably, the microplate reader may further include: a microplate that includes a plurality of sample wells; and the microplate reader further includes: a light source system that enables the light emitted by the light source system to reach the sample placed in the sample wells through the adjustable diaphragm opening of the adjustment device; and a displacement module configured to change relative position between the microplate carrier and the adjustable aperture, so as to allow the light from the sample placed in different sample wells in the plurality of sample wells to pass through the adjustable aperture for detection by the detector. Such a microplate reader allows light, such as from a laser, to be irradiated and can be used for performing the fluorescence measurement on the sample.
[0030] Preferably, the microplate reader can be operated in the fluorescence intensity assay / measurement mode and the chemiluminescence measurement mode; where in the fluorescence intensity assay mode, the light from the light source system reaches the sample placed in the sample wells through the adjustable diaphragm opening, and the diaphragm opening adjusting member is in the first position; in the chemiluminescence measurement mode, the light from the sample in the sample wells can pass through the adjustable aperture to be detected by the detector, and the diaphragm opening adjusting member is in the second position.
[0031] With such an arrangement, the microplate reader according to the present disclosure can be applied in the fluorescence measurement mode and the chemiluminescence measurement mode. During the fluorescence measurement, the hole diameter of the adjustable diaphragm is larger. Since the adjacent wells are less likely to receive excitation light, crosstalk is prevented. The large hole diameter is conducive to a system obtaining more fluorescence, and the signal-to-noise ratio of measurement is improved. During the luminescence (e.g., chemiluminescence) measurement, the hole diameter cannot be excessively large, otherwise unintended light signals from the adjacent wells would also enter the adjustable diaphragm and then collected by the detector, so that the crosstalk signals affect readings of the display device.
[0032] According to the above aspect of the present disclosure, preferably, the ratio of the difference, between the hole diameter of the adjustable diaphragm opening and the hole diameter of the sample well to be measured, to the hole diameter of the adjustable diaphragm opening is less than 20%, in the chemiluminescence measurement mode.
[0033] In addition, further preferably, the hole diameter of the adjustable diaphragm opening is substantially equal to the hole diameter of the sample well to be measured, in the chemiluminescence measurement mode. In this way, the amount of luminous flux, entering through the adjustable diaphragm, of expected light in the wells to be measured can be increased while unintended light signals from the adjacent wells can be prevented from entering through the adjustable diaphragm, and thus the sensitivity and accuracy of detection are improved.
[0034] Therefore, the use requirements can be met by means of the adjustment device of the present disclosure, the disadvantages of the prior art are overcome, and the intended purpose is achieved.Brief description of the drawings
[0035] In order to further clearly describe the adjustment device according to the present disclosure, the present disclosure will be described in detail in combination with the drawings and the detailed embodiments, wherein:
[0036] Figure 1 shows a schematic diagram of the main components of the microplate reader according to the present disclosure;
[0037] Figure 2 shows schematic light paths of the microplate reader according to the present disclosure in a fluorescence measurement mode and a chemiluminescence measurement mode;
[0038] Figure 3 shows a schematic perspective view of the microplate reader including an adjustment device according to the first non-limiting embodiment of the present disclosure;
[0039] Figure 4 is a partial cross-sectional view of the microplate reader shown in Figure 3;
[0040] Figure 5 is an exploded perspective view of the microplate reader shown in Figure 3;
[0041] Figure 6 is a side cross-sectional view of a section of the microplate reader shown in Figure 3;
[0042] Figure 7 is a cross-sectional view of the axial guide member of the adjustment device according to a non-limiting embodiment of the present disclosure;
[0043] Figure 8 is a side view of the first adjustment mechanism of the adjustment device according to the non-limiting embodiment of the present disclosure, wherein the first adjustment mechanism is in a first position;
[0044] Figure 9 is a top view of the first adjustment mechanism shown in Figure 8;
[0045] Figure 10 is a bottom view of the first adjustment mechanism shown in Figure 8;
[0046] Figure 11 is a side view of the first adjustment mechanism of the adjustment device according to a non-limiting embodiment of the present disclosure, wherein the first adjustment mechanism is in a second position;
[0047] Figure 12 is a top view of the first adjustment mechanism shown in Figure 11;
[0048] Figure 13 is a bottom view of the first adjustment mechanism shown in Figure 11;
[0049] Figure 14 is a schematic view of the driving arm of the adjustment device according to a non-limiting embodiment of the present disclosure;
[0050] Figure 15 is a side view of the driving arm shown in Figure 14;
[0051] Figure 16 is a top view of the driving arm shown in Figure 14;
[0052] Figure 17 is a bottom view of the driving arm shown in Figure 14;
[0053] Figure 18 is a top view of the first elastic member of the adjustment device according to the non-limiting embodiment of the present disclosure;
[0054] Figure 19 is a side view of the first elastic member shown in Figure 18;
[0055] Figure 20 is a schematic view of a microplate reader including an adjustment device according to a second non-limiting embodiment of the present disclosure;
[0056] Figure 21 is a schematic view of the microplate reader shown in Figure 20 viewed from a different angle;
[0057] Figure 22 is a side cross-sectional view of the microplate reader shown in Figure 20;
[0058] Figure 23 is an exploded perspective view of the microplate reader shown in Figure 20;
[0059] Figure 24 is a top view of the blade of the adjustment device according to the non-limiting embodiment of the present disclosure;
[0060] Figure 25 is a side view of the blade shown in Figure 24;
[0061] Figure 26 is a schematic perspective view of an actuation ring of the adjustment device according to the non-limiting embodiment of the present disclosure;
[0062] Figure 27 is a side view of the actuation ring shown in Figure 26;
[0063] Figure 28 is a schematic perspective view of the adjustable aperture of the adjustment device according to a non-limiting embodiment of the present disclosure;
[0064] Figure 29 is a side view of the adjustable aperture shown in Figure 28;
[0065] Figure 30 is a schematic perspective view of a guide piece of the adjustment device according to the non-limiting embodiment of the present disclosure;
[0066] Figure 31 is a side view of a guide piece shown in Figure 30;
[0067] Figure 32 is a side view of the second adjustment mechanism of the adjustment device according to the non-limiting embodiment of the present disclosure, wherein the second adjustment mechanism is in the first position; and
[0068] Figure 33 is a side view of the second adjustment mechanism of the adjustment device according to the non-limiting embodiment of the present disclosure, wherein the second adjustment mechanism is in the second position.
[0069] The above drawings are merely schematic and are not drawn strictly to scale. List of references in the figures and embodiments:
[0070] 1000 -microplate reader, comprising:
[0071] 1000A -housing;
[0072] 100 -adjustment device, comprising:
[0073] 10 -actuation mechanism, comprising:
[0074] 11 -first driving part, comprising:
[0075] 11A -first helical portion;
[0076] 12 -stepper motor;
[0077] 13 -synchronous belt;
[0078] 20 -adjustable aperture, comprising:
[0079] 21 -aperture opening;
[0080] 22 -adjustable diaphragm opening;
[0081] 20A -second helical portion;
[0082] 23 -guide groove;
[0083] 24 -guide opening;
[0084] 25 -pivot hole;
[0085] 210 -substrate portion, comprising:
[0086] 210A -guide hole;
[0087] 220 -cover;
[0088] 30 -diaphragm opening adjusting member, comprising:
[0089] 40 -first adjustment mechanism, comprising:
[0090] 41 -driving arm, comprising:
[0091] 411 -radial guide portion;
[0092] 412 -actuation portion;
[0093] 413 -accommodating portion;
[0094] 414 -curved contour;
[0095] 415 -abutting segment;
[0096] 42 -constraint frame, comprising:
[0097] 42A -actuation opening;
[0098] 43 -first elastic member;
[0099] 50 -second adjustment mechanism, comprising:
[0100] 51 -blade, including:
[0101] 511 -first pivot pin;
[0102] 512 -second pivot pin;
[0103] 513 -blade body;
[0104] 513A -arc segment;
[0105] 52 -actuation ring, comprising:
[0106] 521 -actuation ring opening;
[0107] 522 -actuation ring groove;
[0108] 52A -actuation rod;
[0109] 52B -actuation wheel;
[0110] 53 -guide piece, comprising:
[0111] 53A -guide surface;
[0112] 54 -second elastic member;
[0113] 60 -axial guide member;
[0114] 200 -microplate carrier;
[0115] 201 -microplate, comprising:
[0116] 201A -sample hole;
[0117] 201B -sample;
[0118] 300 -light source system;
[0119] 400 -displacement module;
[0120] 500 -detection module;
[0121] 600 -lens assembly;
[0122] D -hole diameter of the sample well;
[0123] D1 -first diaphragm diameter;
[0124] D2 -second diaphragm diameter;
[0125] X -rotation axis;
[0126] A -axial direction;
[0127] C -circumferential direction.Detailed Description
[0128] A microplate reader, also known as a microplate detector or readout instrument, is a multi-module measurement system capable of measuring fluorescence intensity, self-luminescence intensity, absorbance, turbidity and the like on a microplate. This instrument may be provided with a plurality of detection modules.
[0129] For example, the microplate reader may be provided with fluorescence (FL) and self-luminescence (or chemiluminescence) assay modules, and the measurement of the fluorescence intensity and self-luminescence occurs from the top of sample wells. The fluorescence and luminescence measurement modules can be used in a fluorescence intensity measurement / assay mode and a chemiluminescence measurement mode of the microplate reader.
[0130] The present disclosure mainly describes fluorescence measurement and chemiluminescence measurement modules of a microplate reader 1000. Figure 1 shows a schematic diagram of the microplate reader 1000 according to the present disclosure.
[0131] As shown in Figure 1 and as a non-limiting embodiment, the microplate reader 1000 may mainly include an adjustment device 100, a microplate carrier 200, a light source system 300, a displacement module 400 and a detection module 500, etc.
[0132] The adjustment device 100 may be arranged adjacent to the microplate carrier 200. For example, the adjustment device 100 may be positioned by a predetermined distance above the microplate carrier 200 to allow for fluorescence measurements or chemiluminescence assays. The microplate carrier 200 may carry a microplate 201, and the microplate 201 may include one or more sample wells 201A, and a sample 201B to be measured may be placed in one or more sample wells 201A. The adjustment device 100 may be configured to adjust a luminous flux incident to the sample wells 201A of the microplate 201, or a luminous flux incident to the detection module 500 from the sample wells 201A, for example, by adjusting the size of a diaphragm opening or hole. In addition, the adjustment device 100 may adjust a position of the diaphragm opening or hole relative to the sample well 201A, for example, a relative axial position therebetween.
[0133] The light source system 300 may include, for example, an excitation light source to perform the fluorescence measurement on the sample 201B.
[0134] The displacement module 400 may be configured to change the relative position between the microplate carrier 200 and an adjustable aperture 20 and then change the relative position between the microplate 201 and the adjustable aperture 20, so as to allow light from the sample placed in the different sample wells 201A of the microplate 201 to be detectable by a detector of the detection module 500 by passing through the adjustable aperture 20. For example, the displacement module 400 may control the microplate 201 to move within a plane perpendicular to the central axes of the sample wells 201A, such that the sample wells 201A are aligned with the adjustable aperture 20, and especially the central axes of the sample wells are aligned therewith.
[0135] The detection module 500 may include the detector and corresponding light processing components, the detector may be configured to receive and measure parameters of the light from the sample 201B, such as the intensity, and display these parameters on a corresponding display device or to send them to a controller provided with an access device for further processing, analysis, storage or display.
[0136] It should be understood that dividing the modules shown in Figure 1 is merely for convenience of description, but is not intended to limit the present disclosure. In addition, in order to show more clearly a working principle of the microplate reader of the present disclosure, the schematic diagram of Figure 1 does not show specific optical and electronic devices and specific arrangement methods of incident / emergent light paths.
[0137] Figure 2 shows schematic light paths of the microplate reader 1000 according to the present disclosure in a fluorescence measurement mode and a chemiluminescence measurement mode.
[0138] The left side view of Figure 2 shows the schematic optical path in the fluorescence measurement mode and illustrates that it is required to irradiate incident light onto the sample 201B in the sample well 201A to make the sample 201B luminous, and in this case, only the sample 201B irradiated by the incident light can be luminous.
[0139] For example, in the fluorescence measurement mode, a xenon flash lamp may be used as the excitation light source. Excitation light forms a narrow-band light beam by exciting an optical system and a filter wheel. A part of the light beam passes through a lens assembly 600 of the optical system and excites the sample 201B placed in the sample well 201A. The emitted light passes through the lens assembly 600 and is collected by the optical system, such that the detector of the detection module 500 measures the light intensity of a specific wavelength.
[0140] It should be understood that the lens assembly 600 in Figure 2 is merely illustrative and that the lens assembly 600 may include one or more lenses according to the specific arrangement requirement for the light paths, for example, one or more of convex lenses, concave lenses, translucent lenses, half-reflecting lenses, etc.
[0141] The right side view of Figure 2 shows the schematic light path in the chemiluminescence measurement mode. In the chemiluminescence measurement mode, no additional incident light exists, and the sample 201B in the plurality of sample wells 201A can all be self-luminous. For example, in the luminescence measurement mode, the light irradiated by the sample 201B in the sample well 201A passes through the lens assembly 600 and is collected by the optical system to be measured by the detector.
[0142] Figure 3 shows a schematic perspective view of the microplate reader 1000 including the adjustment device 100 according to the first non-limiting embodiment of the present disclosure; Figures 4 and 5 are respectively a partial cross-sectional view and an exploded perspective view of the microplate reader 1000 shown in Figure 3;and Figure 6 is a side cross-sectional view of a section of the microplate reader 1000 shown in Figure 3.
[0143] As shown in Figures 3-6 and as the non-limiting embodiment, the adjustment device 100 may mainly include: an actuation mechanism 10, the adjustable aperture 20 and a diaphragm opening adjusting member 30.
[0144] The actuation mechanism 10 may be, for example, a rotary actuation mechanism as shown in the figures. The actuation mechanism 10 is coupled to (e.g., fixed to or mounted to) a housing 1000A of the microplate reader 1000, and may include a first driving part 11, a stepper motor 12 and a synchronous belt 13. As shown in detail in Figure 5, the first driving part 11 may be a portion (e.g., an upper portion) of a synchronous wheel provided with teeth on an outer surface thereof, and the first driving part 11 is of an annular structure that has a rotation axis X and is provided with a first helical portion 11A on an inner surface thereof. As an example, the first helical portion 11A may be an internal thread. The synchronous wheel cooperates with the synchronous belt 13, and the synchronous belt 13 may have teeth or a similar structure cooperating with the teeth of the first driving part 11 to transmit a movement of the stepper motor 12 to the first driving part 11. The stepper motor 12 may be, for example, an electric stepper motor and may be various types of electric stepper motors in the art. In this way, the first driving part 11 can be driven to rotate about the rotation axis X by the stepper motor 12.
[0145] It should be understood that although the actuation mechanism 10 of the present disclosure is described in conjunction with the synchronous wheel and the stepper motor, the actuation mechanism 10 may include other types of structures, including but not limited to, an automatic actuator / driver, for example, a linear driver (e.g., a pneumatic or hydraulic cylinder) , a rotary driver, a manual driver and combinations thereof, etc., and the first driving part 11 may have a shape except a wheel-type structure, for example, a polygonal shape, etc.
[0146] The adjustable aperture 20 may be at least partially arranged inside the actuation mechanism 10 and may include a substantially cylindrical body structure and a substrate portion 210 extending outwardly from the body structure. During the measurement, the adjustable aperture 20 of the adjustment device 100 may be positioned adjacent to the microplate carrier 200 and the microplate, for example, located above the microplate carrier 200. Preferably, the center of the adjustable aperture 20 may be aligned with the center of the sample well 201A of the microplate placed on the microplate carder 200 to receive the light irradiated from the sample well 201A, that is, to allow the detector of the detection module 500 to detect the light passing through the adjustable aperture 20 from the sample 201B to be measured.
[0147] The cylindrical body structure may include an aperture opening 21 and an adjustable diaphragm opening 22. The substrate portion 210 of the adjustable aperture 20 may be provided with a second helical portion 20A, and the second helical portion 20A may cooperate with the first helical portion 11A. The light emitted by the light source system 300 can reach the sample 201B placed in the sample well 201A through the adjustable diaphragm opening 22 of the adjustment device 100.
[0148] In the embodiment in which the first helical portion 11A is the internal thread, the second helical portion 20A may be an external thread arranged on an outer circumferential surface of the substrate portion 210.
[0149] As an example, the circumferential dimensions of the first helical portion 11A and second helical portion 20A and / or the pitches of the threads may be selected or set to adjust the size of the adjustable diaphragm opening 22, the accuracy of an axial position change and a proportional relationship between a size change and the axial position change of the adjustable diaphragm opening 22.
[0150] As shown in FIGS. 5 and 6 and as the non-limiting embodiment, the substrate portion 210 may have a substantially circular hollow portion with a cross section forming a substantially “L” -shaped structure, where the height of an outer circumferential edge portion of the substrate portion 210 is greater than the height of a central portion of the substrate portion 210 to allow an increase in the thread length or number of the external thread portion, and to facilitate a cover 220 described below being accommodated in the central portion.
[0151] In an alternative embodiment (e.g., in an embodiment shown below in conjunction with Figures 20-23) , the substrate portion 210 may also have a substantially the same height, that is, formed as a disk with substantially parallel upper and lower surfaces.
[0152] Thus, as the first driving part 11 rotates in a circumferential direction C, a movement of the first driving part 11 in the circumferential direction C can be changed into a movement of the adjustable aperture 20 in an axial direction A.
[0153] The term “axial direction” as used herein refers to a direction substantially running along the central axis of the adjustable aperture 20 or a direction substantially parallel to the central axis of the adjustable aperture 20.
[0154] As shown in Figures 5 and 6, the size of the aperture opening 21 may be fixed, and the diaphragm opening adjusting member 30 may be arranged around the aperture opening 21 and define the size of the adjustable diaphragm opening 22.
[0155] For example, the diaphragm opening adjusting member 30 is movable between a first position and a second position, and the adjustable diaphragm opening 22 may be in an expanded state when in the first position, and in a narrowed state when in the second position.
[0156] Referring again to Figure 2, in the left side view of Figure 2, the adjustable diaphragm opening 22 may be in the enlarged state in which the diameter of the adjustable diaphragm opening 22 may be a first diaphragm diameter D1, and the first diaphragm diameter D 1 may be greater than the hole diameter D of the sample wells. In the right side view of Figure 2, the adjustable diaphragm opening 22 may be in the narrowed state in which the diameter of the adjustable diaphragm opening 22 may be a second diaphragm diameter D2, and the second diaphragm diameter D2 may be substantially equal to the hole diameter D of the sample wells. For example, a ratio of the difference, between the hole diameter of the adjustable diaphragm opening 22 and the hole diameter of the sample well 201A to be measured of the microplate 200, to the hole diameter of the adjustable diaphragm opening 22 may be less than 20%. It should be understood that the “difference” described herein refers to an absolute value without a sign / directivity, and therefore the hole diameter of the adjustable diaphragm opening 22 may be greater than, less than or preferably equal to the hole diameter of the sample well 201A to be measured of the microplate 200.
[0157] In addition, it should be understood that those skilled in the art may select a specific proportional relationship between the hole diameter of the adjustable diaphragm opening 22 and the hole diameter of the sample well 201A to be measured of the microwell plate 200 depending on a specific chemiluminescence measurement scenario, and meanwhile may change the relative position (e.g., the relative position in the axial direction) between the adjustable diaphragm opening 22 and the sample well 201A, so that, on the one hand, as much light as possible from the sample well 201A to be measured is allowed to pass through the adjustable diaphragm opening 22, on the other hand, the crosstalk effect caused by interference light from adjacent sample wells is limited, and thus the measurement accuracy is improved.
[0158] Specifically, as a non-limiting example, the hole diameter of the adjustable diaphragm opening 22 may be greater than the hole diameter of the sample well 201A to be measured of the microplate 200. For example, the hole diameter of the sample well 201A to be measured of the microplate 200 may be less than the hole diameter of the adjustable diaphragm opening 22 by 20%, 10%, 5%, 1%, etc. As another non-limiting example, the hole diameter of the adjustable diaphragm opening 22 may be less than the hole diameter of the sample well 201A to be measured of the microplate 200. For example, the hole diameter of the sample well 201A to be measured of the microplate 200 may be greater than the hole diameter of the adjustable diaphragm opening 22 by 20%, 10%, 5%, 1%, etc.
[0159] In addition, as shown in Figure 5, the substrate portion 210 may be provided with guide holes 210A, and these guide holes 210A extend in the axial direction A. An axial guide member 60 may extend to pass through these guide holes 210A, and one end (e.g., the upper end shown in the figure) of the axial guide member 60 may be fixed to a frame or the housing of the microplate reader 1000. The axial guide member 60 can limit the movement of the adjustable aperture 20 in the circumferential direction C and allow the adjustable aperture 20 to move in the axial direction A.
[0160] In this way, the stepper motor 12 drives the first driving part 11 to rotate by means of the synchronous belt 13, and the first driving part 11 can drive the adjustable aperture 20 to move in the axial direction by means of thread fit and the guide structure.
[0161] Preferably, two or more axial guide members 60 may be provided, these axial guide members 60 may be arranged symmetrically relative to the center of the substrate portion 210, so that when the first driving part 11 is tensioned by the synchronous belt 13, the stability of the first driving part 11 and the adjustable aperture 20 can still be ensured, and thus the stability and accuracy of the adjustment device can be ensured.
[0162] Figure 7 is a cross-sectional view of the axial guide member 60 of the adjustment device 100 according to a non-limiting embodiment of the present disclosure.
[0163] As shown in the figure, the axial guide member 60 is formed in the form of a guide pin and includes a first end portion 61 and a second end portion 62. The first end portion 61 may include an external thread that may fit with an internal thread in the frame or housing 1000A of the microplate reader 1000 to screw the axial guide member 60 onto the first end portion. The second end portion 62 may include an accommodating portion for actuating or screwing the axial guide member 60, and the accommodating portion may be formed to match with a hand-operated tool such as an inner hexagon spanner or a screwdriver.
[0164] An exemplary structure of a first adjustment mechanism 40 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure will be described in detail below in conjunction with Figures 8-13.
[0165] Figure 8 is a side view of the first adjustment mechanism 40, where the first adjustment mechanism 40 is in a first position; and Figures 9 and 10 are respectively a top view and a bottom view of the first adjustment mechanism 40 shown in Figure 8. Figure 11 is a side view of the first adjustment mechanism 40, where the first adjustment mechanism 40 is in a second position; and Figures 12 and 13 are respectively a top view and a bottom view of the first adjustment mechanism 40 shown in Figure 11.
[0166] As shown in the figures, the first adjustment mechanism 40 may be a claw-type adjustment mechanism and may include a plurality of driving arms 41 and a restraint frame 42. The plurality of driving arms 41 are arranged around the aperture opening 21, and each driving arm 41 may be provided in a guide groove 23 in a circumferential wall of the adjustable aperture 20. As shown in Figures 8 and 11, the driving arm 41 is arranged obliquely in the guide groove 23 so as to form a substantially conical structure having a smaller circumferential dimension at the bottom and a larger circumferential dimension at the top.
[0167] The restraint frame 42 is substantially annular and has an actuation opening 42A, and the actuation opening 42A may be arranged circumferentially around a periphery of the driving arms 41. According to this embodiment of the present disclosure, the circumferential dimension of the actuation opening 42A is between the circumferential dimensions of the bottom and the top of the substantially conical structure formed by the plurality of driving arms 41 jointly, so that as the bottoms of the plurality of driving arms 41 pass through the actuation opening 42A, the restraint frame 42 allows the driving arms to move towards the center, that is, to move in a radially inward direction, by means of the closure of the actuation opening 42A and the actuation of the driving arms 41.
[0168] For example, the plurality of driving arms 41 can be actuated by the restraint frame 42 to move from the first position shown in Figures 8-10 to the second position shown in Figures 11-13. In this way, in the first position, the adjustable diaphragm opening 22 formed by enclosure of the plurality of driving arms 41 is in the expanded state, and in the second position, the adjustable diaphragm opening 22 is in the narrowed state. Thus, the size of the adjustable diaphragm opening 22 in the first position may be greater than the size of the adjustable diaphragm opening 22 in the second position.
[0169] In the microplate reader according to the present disclosure, the diaphragm opening adjusting member 30 is in the first position when in the fluorescence intensity assay mode, and the diaphragm opening adjusting member 30 is in the second position when in the chemiluminescence measurement mode.
[0170] Figures 14-17 are schematic diagrams of the driving arm 41 of the adjustment device 100 according to a non-limiting embodiment of the present disclosure from different perspectives.
[0171] As an example, the driving arm 41 may be a substantially L-shaped structure, and may include a radial guide portion 411 and an actuation portion 412 at an angle with the radial guide portion 411, and an accommodating portion 413 may be formed at an internal comer where the radial guide portion 411 is engaged with the actuation portion 412.
[0172] The radial guide portion 411 may include a flat and straight guide segment that cooperates with a matched guide segment (e.g., in the form of a sliding groove) of an end surface of the adjustable aperture 20 (e.g., an inner surface of an end of the adjustable aperture 20) to allow the driving arm 41 to reciprocate in a direction parallel to the radial direction.
[0173] The actuation portion 412 may be formed in a substantially cylindrical shape and has a smooth outer surface, and especially a surface portion thereof cooperating with the actuation opening 42A of the restraint frame 42 is smooth. The actuation portion 412 may be arranged in the guide groove 23 in the circumferential wall of the adjustable aperture 20.
[0174] The accommodating portion 413 may have a circular arc-shaped contour and cooperates with a first elastic member 43 described below in conjunction with Figures 18 and 19.
[0175] In addition, as shown in detail in Figures 14 and 16, the bottom of the driving arm 41 may have a curved contour segment 414, and the curved contour 414 may be a part of a circular arc. All the driving arms 41 may be arranged around the aperture opening 21, and the curved contour segments 414 of these driving arms 41 may form the adjustable diaphragm opening 22 by means of enclosure, and the size of the adjustable diaphragm opening 22 varies as the driving arms 41 move towards or away from the aperture opening 21. For example, when the driving arms 41 move towards the center of the aperture opening 21, the adjustable diaphragm opening 22 becomes small, and when the driving arms 41 move away from the center of the aperture opening 21, the adjustable diaphragm opening 22 can become large.
[0176] It should be understood that the adjustable diaphragm opening 22 formed by means of the enclosure of the curved contour segments 414 may have a circular or substantially circular shape.
[0177] An abutting segment 415 may be arranged at the top of the driving arm 41, and the abutting segment 415 may have a flat upper surface that may cooperate with the cover 220 (see Figure 6) sealing the substrate portion 210 to assist the movement of the driving arm 41 towards or away from the center of the aperture opening 21. As described above, the restraint frame 42 may be of a substantially annular structure and arranged around the actuation portion 412. The restraint frame 42 has an opening having a predetermined size, that is, the actuation opening 42A, such that an inner surface of the actuation opening 42A remains always in contact with an outer surface of the actuation portion 412.
[0178] In this way, as the adjustable aperture 20 moves away from the first driving part 11 in the axial direction A, the restraint frame 42 pushes and abuts against the actuation portion 412 to force the first adjustment mechanism 40 to move towards the second position, and the size of the adjustable diaphragm opening 22 becomes small in this process. Conversely, as the adjustable aperture 20 moves close to the first driving part 11 in the axial direction A, the restraint frame 42 releases the actuation portion 412 to allow the movement of the first adjustment mechanism 40 towards the first position, and the size of the adjustable diaphragm opening 22 becomes large in this process.
[0179] In the present disclosure, the movement of the adjustable aperture 20 away from the first driving part 11 in the axial direction A may alternatively be referred to as the movement of the adjustable aperture 20 in a first direction in the axial direction A, the movement of the adjustable aperture 20 close to or approaching the first driving part 11 in the axial direction A may be referred to as the movement of the adjustable aperture 20 in the second direction in the axial direction A, and the second direction may be opposite to the first direction.
[0180] In order to facilitate the movement of the first adjustment mechanism 40 towards the first position, the first adjustment mechanism 40 further includes the first elastic member 43, and the first elastic member is attached to the accommodating portion 413 of the driving arm 41 and biases the first adjustment mechanism 40 towards the first position.
[0181] Figure 18 is a top view of the first elastic member 43 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure; and Figure 19 is a side view of the first elastic member 43 shown in Figure 18.
[0182] As shown in the figures, the first elastic member 43 may be formed in the form of an elastic ring and is bent at two ends to avoid interference with adjacent components. The first elastic member 43 may be made of a steel product, for example, a high-strength spring steel.
[0183] When the first adjustment mechanism 40 is in the first position, the first elastic member 43 may be in an initial state or an elastically contracted state, for example, elastically deformed towards the center thereof, such that a circumferential dimension thereof is less than an initial dimension. As the first adjustment mechanism 40 moves towards the second position, the first elastic member 43 continues to be elastically deformed towards the center thereof so as to bias the first adjustment mechanism 40 towards the first position.
[0184] According to the embodiment of Figures 3-19, the rotation of the first driving part 11 causes the movement of the adjustable aperture 20 in the axial direction A. As the adjustable aperture 20 moves in the axial direction A, the driving arm 41 can move towards or away from the center of the aperture opening 21 under the action of the restraint frame 42 and the first elastic member 43.
[0185] In this way, the first adjustment mechanism 40 moves between the first position and the second position, as the adjustable aperture 20 moves away from the first driving part 11 in the axial direction A, the adjustable diaphragm opening 22 undergoes a transition to the narrowed state, and as the adjustable aperture 20 moves towards the first driving part 11 in the axial direction A, the adjustable diaphragm opening 22 undergoes a transition to the expanded state. At this point, the restraint frame 42 may be disengaged from the driving arm 41, and the driving arm 41 moves away from the center of the aperture opening 21 by means of a biasing force of the first elastic member 43.
[0186] Figures 20 and 21 show schematic perspective views of a microplate reader 1000 including an adjustment device 100 according to a second non-limiting embodiment of the present disclosure; and Figures 22 and 23 are respectively a side cross-sectional view and an exploded perspective view of the microplate reader 1000 shown in Figure 20.
[0187] Except for the differences described below, the microplate reader 1000 shown in Figures 20-23 is similar to the microplate reader 1000 shown in Figures 3-19, where the same or similar elements / components are generally indicated herein by the same or similar reference numerals, and the description thereof will not be repeated below.
[0188] As shown in Figures 20-23 and as the non-limiting example, the adjustment device 100 may alternatively include a second adjustment mechanism 50. The second adjustment mechanism 50 may be, for example, a blade-type adjustment mechanism and may include a plurality of blades 51 and an actuation ring 52.
[0189] Figure 24 is a top view of the blade 51 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure; and Figure 25 is a side view of the blade 51 shown in Figure 24.
[0190] As shown in the figures, the blade 51 may have a substantially arc-shaped structure and include a first pivot pin 511 located at a first end, a second pivot pin 512 located at a second end, and a blade body 513 extending between the first end and the second end. The first pivot pin 511 and the second pivot pin 512 may have substantially cylindrical structures, and the blade body 513 may have an arc segment 513A. The arc segments 513A of the plurality of blades 51 may be arranged around the aperture opening 21 and form the adjustable diaphragm opening 22 by means of enclosure. Similarly, the adjustable diaphragm opening 22 formed by means of the enclosure of the plurality of blades 51 may have a circular or substantially circular shape.
[0191] Figure 26 is a schematic perspective view of the actuation ring 52 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure; and Figure 27 is a side view of the actuation ring 52 shown in Figure 26.
[0192] As shown in the figures, the actuation ring 52 may have a substantially circular ring-shaped contour and have an actuation ring opening 521 and actuation ring grooves 522 extending outwardly from the actuation ring opening 521 in a radial direction. The actuation ring opening 521 may be a through opening, and the actuation ring groove 522 may be a through or non-through guide groove. In the embodiment shown in Figures 26 and 27, the actuation ring groove 522 is non-through. The actuation ring 52 and the aperture opening 21 may be arranged concentrically and is pivotable around the aperture opening 21, for example, be actuated by an actuation rod 52A connected to the actuation ring opening 521.
[0193] Figure 28 is a schematic perspective view of the adjustable aperture 20 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure; and Figure 29 is a side view of the adjustable aperture 20 shown in Figure 28.
[0194] As shown in the figures, the adjustable aperture 20 may be provided with a guide opening 24 and pivot holes 25. The guide opening 24 may be formed in a side wall of the adjustable aperture 20 and formed as an elongated hole extending in a circumferential direction, and the pivot holes 25 may be formed in an inner surface of the bottom of the adjustable aperture 20 and spaced at intervals in the circumferential direction. The number of a plurality of pivot holes 25 may be equal to the number of the blades 51.
[0195] According to this embodiment of the present disclosure, the first pivot pin 511 at the first end of each blade 51 may be pivotally arranged in the corresponding pivot hole 25 of the adjustable aperture 20, such that the first pivot pin 511 is allowed to pivot in the pivot hole 25. Accordingly, the second pivot pin 512 at the second end of each blade 51 may be pivotally arranged in the actuation ring groove 522 of the actuation ring 52. The blades 51 are arranged adjacently and stacked one after another, such that the arc segments 513A of the plurality of blades 51 can be arranged around the aperture opening 21 and form the adjustable diaphragm opening 22 by means of enclosure, and the size of the adjustable diaphragm opening 22 varies as the actuation ring 52 pivots.
[0196] In order to allow the actuation ring 52 to be actuated by the actuation rod 52A, the second adjustment mechanism 50 may further include a guide piece 53.
[0197] Figure 30 is a schematic perspective view of the guide piece 53 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure; and Figure 31 is a side view of the guide piece 53 shown in Figure 30.
[0198] As shown in the figures, the guide piece 53 may have a substantially arc-shaped overall structure and have a top mounting segment and a bottom guide segment. A plurality of threaded holes are formed in the mounting segment, the guide piece 53 can be fixed to the frame or housing 1000A of the microplate reader 1000 by means of the threaded holes, such that the guide piece 53 remains fixed. For example, the guide piece 53 may be fixed relative to the housing 1000A and relative to the adjustable aperture 20 in the circumferential direction, thus allowing the adjustable aperture 20 to move relative to the guide piece 53 in the axial direction. The guide segment of the guide piece 53 may have an inclined guide surface 53A.
[0199] In this way, the actuation rod 52A can extend out from the guide opening 24 formed in the circumferential wall of the adjustable aperture 20 and cooperates with the guide surface 53A, such that as the adjustable aperture 20 moves in the axial direction A, the actuation ring 52 can be guided by the guide surface 53A to move in the circumferential direction C.
[0200] The free end of the actuation rod 52A may be provided with an actuation wheel 52B, and the actuation wheel 52B has a recessed circumferential surface that may cooperate with the guide surface 53A to allow the actuation rod 52A to be smoothly actuated by the actuation ring 52.
[0201] An inclination angle of the guide surface 53A of the guide piece 53 and / or the diameter of the actuation wheel 52B may be selected (e.g., by means of calculation) , to change a rotation angle of the first driving part 11, the axial movement distance of the adjustable aperture 20 and a corresponding proportional relationship between the rotation angle, the axial movement distance and the hole diameter of the adjustable diaphragm opening 22 according to requirements.
[0202] Figure 32 is a side view of the second adjustment mechanism 50 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure, where the second adjustment mechanism 50 is in the first position; and Figure 33 is a side view of the second adjustment mechanism 50 of the adjustment device 100 according to the non-limiting embodiment of the present disclosure, where the second adjustment mechanism 50 is in the second position.
[0203] According to this embodiment of the present disclosure, an arrangement manner of the inclination direction of the guide surface 53A of the guide piece 53, the rotation direction of the first driving part 11 and / or the first helical portion 11A and second helical portion 20A can be selected such that as the adjustable aperture 20 moves towards or close to the housing 1000A or the first driving part 11 in the axial direction A, the actuation rod 52A is engaged with the guide surface 53A and pushed by the guide piece 53 to move in the circumferential direction, and that the actuation ring 52 is actuated by the actuation rod 52A to rotate in the circumferential direction, the second pivot pins 512 at the second ends of the plurality of blades 51 may thus move away from the center of the aperture opening 21 along the actuation ring grooves 522, and the size of the adjustable diaphragm opening 22 becomes large in this process. In this way, the second adjustment mechanism 50 may, for example, change from the second position shown in Figure 33 to the first position shown in Figure 32.
[0204] Conversely, as the adjustable aperture 20 moves away from the housing 1000A or the first driving part 11 in the axial direction A, the guide surface 53A is disengaged from the actuation rod 52A to allow the second pivot pins 512 at the second ends of the plurality of blades 51 to move towards the center of the aperture opening 21 along the actuation ring grooves 522, and the size of the adjustable diaphragm opening 22 becomes small in this process. In this way, the second adjustment mechanism 50 may, for example, change from the first position shown in Figure 32 to the second position shown in Figure 33.
[0205] In order to facilitate the movement of the second adjustment mechanism 50 towards the second position, the second adjustment mechanism 50 further includes a second elastic member 54, the second elastic member 54 is arranged between the actuation rod 52A and the adjustable aperture 20 and biases the second adjustment mechanism 50 towards the second position.
[0206] As the non-limiting example, the second elastic member 54 may be, for example, in the form of a linear spring, one end is connected to the actuation rod 52A, and the other end is connected to the adjustable aperture 20, for example, to a protruding portion or an attachment portion arranged on the outer surface of the adjustable aperture 20.
[0207] As the adjustable aperture 20 moves towards or close to the housing 1000A or the first driving part 11 in the axial direction A, the actuation rod 52A can be pivoted along the guide opening 24 in the circumferential direction to rotate the actuation ring 52 and make the size of the adjustable diaphragm opening 22 become large, and the linear spring is elastically deformed (e.g., stretched or compressed) , such that the actuation rod 52A is biased towards an initial position. Once the adjustable aperture 20 moves away from the first driving part 11 in the axial direction A, an acting force pressing against the actuation rod 52A disappears or is reduced, and the actuation rod 52A moves in an opposite circumferential direction by means of an elastic biasing force of the second elastic member 54, so as to make the size of the adjustable diaphragm opening 22 become small.
[0208] In summary and referring again to Figure 2, the fluorescence and chemiluminescence measurements can be conveniently performed by using the microplate reader 1000 including the adjustment device 100 according to the non-limiting embodiment of the present disclosure. During the fluorescence measurement, the adjustment device 100 makes the hole diameter of the adjustable diaphragm opening 22 or hole approximate or equal the hole diameter of the aperture opening 21, so as to allow more light to pass through the adjustable diaphragm opening 22 as much as possible. In this case, the adjustable diaphragm opening 22 can be positioned away from the sample well 201A and close to the lens assembly 600. When the microplate reader is used for the luminescence measurement, the hole diameter of the adjustable diaphragm opening 22 or hole can approximate or equal the hole diameter of the sample well 201A of the microplate 201, and compared with the fluorescence measurement, the adjustable diaphragm opening 22 or hole can be relatively positioned closer to the sample well 201A to limit the crosstalk effect caused by interference light from adjacent sample wells and thus improve the measurement accuracy. In this case, the adjustable diaphragm opening 22 or hole may be further away from the lens assembly 600.
[0209] In addition, it should be noted that an axial distance between the lens assembly 600 and the sample well 201A may remain unchanged substantially during the switching of the two modes, and the position of the adjustable diaphragm opening 22 can be changed within an axial range defined by the lens assembly 600 and the sample well 201A.
[0210] As used herein, the terms “upper” , “lower” , “above” , and “below” for indicating directions or orientations and the terms “first” , “second” , etc. for indicating sequences are merely for the purpose of making those of ordinary skill in the art better understand the concept of the present disclosure described in the form of the preferred embodiments, and are not intended to limit the present disclosure. Unless otherwise specified, all the sequences, directions, or orientations are used only for the purpose of distinguishing one element / component / structure from another element / component / structure. Also, unless otherwise stated, they do not indicate any specific sequences, operation sequences, directions or orientations. For example, in an alternative embodiment, the term “first position” may be a “second position” , and the term “first helical portion” may alternatively refer to a “second helical portion” .
[0211] As used herein, unless otherwise indicated, the term “substantially” is construed as representing a value or a value range plus or minus ten percent, or representing a shape and / or a position having a deviation of plus or minus ten percent.
[0212] In summary, the adjustment device 100 according to the embodiments of the present disclosure overcomes the disadvantages in the prior art and achieves the expected objective of the present disclosure.
[0213] Although the adjustment device of the present disclosure is described above in combination with preferred embodiments, those skilled in the art shall appreciate that the above examples are illustrative only and should not be regarded as limitations on the present disclosure. Therefore, various modifications and variations may be made to the present disclosure within the spirit and scope of the claims, and such modifications and variations shall fall within the scope of the claims of the present disclosure.
Claims
1.An adjustment device (100) for a microplate reader (1000) comprising:an actuating mechanism (10) connected to a housing (1000A) of the microplate reader (1000) ;an adjustable aperture (20) comprising an aperture opening (21) , wherein the adjustable aperture (20) is driven to move in an axial direction (A) by the actuating mechanism (10) ; anda diaphragm opening adjusting member (30) configured to be movable relative to the center of the aperture opening (21) so as to define an adjustable diaphragm opening (22) in the adjustable aperture (20) ,wherein the diaphragm opening adjusting member (30) is movable between a first position and a second position as the adjustable aperture (20) moves towards or away from a microplate (201) in the axial direction (A) , and a size of the adjustable diaphragm opening (22) in the first position is greater than a size of the adjustable diaphragm opening (22) in the second position.2.The adjustment device (100) according to claim 1, wherein the actuating mechanism (10) comprises a first driving part (11) that is rotatable about a rotation axis (X) and is provided with a first helical portion (11A) ; andthe adjustable aperture (20) is provided with a second helical portion (20A) that cooperates with the first helical portion (11A) to change a movement of the first driving part (11) in a circumferential direction (C) into the movement of the adjustable aperture (20) in the axial direction (A) .3.The adjustment device (100) according to claim 2, further comprises an axial guide member (60) that limits the movement of the adjustable aperture (20) in the circumferential direction (C) and allows the movement of the adjustable aperture (20) in the axial direction (A) .4.The adjustment device (100) according to claim 2, wherein the actuating mechanism (10) further comprises a stepper motor (12) and a synchronous belt (13) , wherein the first driving part (11) is formed as a synchronous wheel and is driven by the stepper motor (12) by means of the synchronous belt (13) .5.The adjustment device (100) according to any one of claims 1 to 4, wherein the diaphragm opening adjusting member (30) is configured such that: as the adjustable aperture (20) moves in a first direction in the axial direction (A) , the adjustable diaphragm opening (22) undergoes a transition to a narrowed state, and as the adjustable aperture (20) moves in a second direction opposite to the first direction in the axial direction (A) , the adjustable diaphragm opening (22) undergoes a transition to an expanded state.6.The adjustment device (100) according to claim 5, wherein the diaphragm opening adjusting member (30) includes a first adjustment mechanism (40) , the first adjustment mechanism including:a plurality of driving arms (41) including a radial guide portion (411) and an actuation portion (412) at an angle with the radial guide portion (411) , wherein the radial guide portion (411) is configured to guide the driving arm (41) to reciprocate in a radial direction or in a direction parallel to the radial direction, and the actuation portion (412) is arranged in a guide groove (23) in a circumferential wall of the adjustable aperture (20) ; anda restraining frame (42) arranged around the actuation portion (412) , and pushes and abuts, as the adjustable aperture (20) moves in the first direction in the axial direction (A) , against the actuation portion (412) to force the first adjustment mechanism (40) to move toward the second position under the guidance of the radial guide portion (411) .7.The adjustment device (100) according to claim 6, wherein the first adjustment mechanism (40) further comprises a first elastic member (43) attached to the accommodating portion (413) of the driving arm (41) and biases the first adjustment mechanism (40) toward the first position.8.The adjustment device (100) according to any one of claims 1 to 4, wherein the diaphragm opening adjusting member (30) includes a second adjustment mechanism (50) , the second adjustment mechanism including:a plurality of blades (51) arranged around the aperture opening (21) and enclosing the adjustable diaphragm opening (22) , and a first end of each of the plurality of blades (51) being pivotally fixed to the adjustable aperture (20) ; andan actuation ring (52) arranged concentrically with the aperture opening (21) and being pivotable around the aperture opening (21) , wherein a second end, opposite the first end, of each of the plurality of blades (51) being pivotally fixed to the actuation ring (52) , so that the change in the size of the adjustable diaphragm opening (22) changes is caused as the actuation ring (52) pivots.9.The adjustment device (100) according to claim 8, wherein the second adjustment mechanism (50) further includes:a guide piece (53) fixed relative to the housing (1000A) and has an inclined guide surface (53A) , andthe actuation ring (52) further includes an actuation rod (52A) that extends from a guide opening (24) in a circumferential wall of the adjustable aperture (20) and cooperates with the guide surface (53A) , such that as the adjustable aperture (20) moves in the axial direction (A) , the actuation ring (52) is guided by the guide surface (53A) to move in the circumferential direction (C) .10.The adjustment device (100) according to claim 9, wherein the second adjustment mechanism (50) further includes a second elastic member (54) arranged between the actuation rod (52A) and the adjustable aperture (20) and biases the second adjustment mechanism (50) toward the second position.11.A microplate reader (1000) , the microplate reader (1000) comprising:The adjustment device (100) according to any one of claims 1 to 10, anda microplate carrier (200) for carrying a microplate (201) , the microplate including sample well (s) (201A) in which sample (s) (201B) to be measured is (are) placed,wherein the adjustable aperture (20) of the adjustment device (100) is located above the microplate (201) , and the microplate reader further comprises a detector, the detector detecting light passing through the adjustable aperture (20) from the sample (s) (201B) to be measured.12.The microplate reader (1000) according to claim 11, wherein the microplate (201) includes a plurality of sample wells (201A) , and the microplate reader further includes:a light source system (300) that enables the light emitted by the light source system to reach the sample (201B) disposed in the sample wells (201A) through the adjustable diaphragm opening (22) of the adjustment device (100) ; anda displacement module (400) configured to change to change a relative position between the microplate carrier (200) and the adjustable aperture (20) , so as to allow the light from the sample (201B) placed in different sample wells (201A) in the plurality of sample wells to pass through the adjustable aperture (20) for detection by the detector.13.The microplate reader (1000) according to claim 12, wherein the microplate reader can be operated in a fluorescence intensity measurement mode and a chemiluminescence measurement mode, wherein in the fluorescence intensity measurement mode, the light from the light source system (300) reaches the sample (201B) placed in the sample wells (20lA) through the adjustable diaphragm opening (22) , and the diaphragm opening adjusting member (30) is in the first position, and in the chemiluminescence measurement mode, light from the sample (201B) in the sample wells (201A) can pass through the adjustable diaphragm (20) to be detected by the detector, and the diaphragm opening adjusting member (30) is in the second position.14.The microplate reader (1000) according to claim 13, wherein the ratio of the difference, between a hole diameter of the adjustable diaphragm opening (22) and a hole diameter of the sample well (201A) to be measured, to a hole diameter of the adjustable diaphragm opening (22) is less than 20%, in the chemiluminescence measurement mode.15.The microplate reader (1000) according to claim 13, wherein a hole diameter of the adjustable diaphragm opening (22) is substantially equal to a hole diameter of the sample well (201A) to be measured, in the chemiluminescence measurement mode.
Citation Information
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