Optical meter axis movement detection device for constructing concave lens based on microfluidics
By setting up a microfluidic array between the optical table axis and the image sensor, using the microfluidic chip to form a concave lens-shaped droplet, amplifying the pattern area of the light spot group, the problem of low detection accuracy in the prior art is solved, and the further development is achieved Accurate optical axis movement detection.
Patent Information
- Application Number
- CN202420052814.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-09
AI Technical Summary
The existing optical meter axis movement detection technology has low detection accuracy, making it difficult to accurately judge the movement direction and distance of the optical meter axis, resulting in misjudgment.
An optical meter axis movement detection device that constructs a concave lens based on microfluidics is adopted. By setting a microfluidic array between the optical meter axis and the image sensor, a first microfluidic chip and a second microfluidic chip are used to form a convex shape. Control the droplets to be in the shape of a concave lens, amplify the graphic area of the spot group, and increase the number of overlapping feature points collected by the image sensor.
The accuracy of the optical meter axis movement detection is improved, and the movement direction and distance of the optical meter axis can be determined more accurately, reducing the error judgment rate.
Smart Images
Figure CN222166008U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of microfluidics, and in particular to an optical table axis movement detection device based on microfluidics to construct a concave lens. Background Art
[0002] The detection principles of optical watch axes in electronic watches on the market are similar. The main principles are: laser irradiates the optical watch axis, diffraction occurs to produce many light spots, and an image sensor (such as CMOS, CCD, etc.) with a fixed area and position collects the light spots to obtain a first grayscale image. After the optical watch axis rotates, the light spot group will move, and the image sensor will obtain a second grayscale image after collection. The two grayscale images are processed, and the direction and distance of the optical watch axis movement are inferred based on the same patterns in the first grayscale image and the second grayscale image, and then fed back to the display interface that the user can see.
[0003] like Figure 1 The figure shows the principle diagram of the movement detection of the optical axis. The solid rectangular frame is the position of the image sensor. In fact, the image sensor is stationary, and the light spot group is moving. For ease of understanding, the coordinate system is switched, showing that the light spot group is stationary, and the image sensor is moving. Figure 1 In the figure, the laser irradiates the optical axis, and a group of light spots is generated within the imaging range. The solid rectangular frame is the first grayscale image before the optical axis moves, and the dotted rectangular frame is the second grayscale image after the optical axis moves. The overlapping area of the first grayscale image and the second grayscale image is the same pattern area before and after the optical axis moves. The solid circle in the overlapping area is a schematic diagram of the sampling point. Figure 1 9 sampling points are shown in the figure, but there are actually more than these 9 points. Take the sampling points in the dotted ellipse as an example, Figure 1 The sampling points in the middle dotted ellipse have two points collected on the light spot. The moving direction of the optical table axis can be detected according to the first grayscale image and the second grayscale image.
[0004] It can be seen that whether the same pattern can be accurately judged and not misjudged as the same pattern due to the closeness of the patterns is crucial for accurate movement detection. Image sensors are relatively expensive and the density cannot be very high, which determines that it is difficult to improve the detection accuracy in the existing technology.
[0005] In summary, the current optical table axis movement detection has the problem of low detection accuracy. Utility Model Content
[0006] The present application provides an optical watch axis movement detection device based on microfluidics to construct a concave lens, which is used to solve the problem of low detection accuracy of current optical watch axis movement detection.
[0007] The embodiment of the present application provides an optical table axis movement detection device based on microfluidics to construct a concave lens, including a microfluidics array, a droplet, an image sensor and a control component;
[0008] The microfluidic array includes various microfluidic units; the microfluidic units include a first microfluidic chip and a second microfluidic chip; the bottom surface of the first microfluidic chip and the bottom surface of the second microfluidic chip are coplanar, and the top surface of the first microfluidic chip and the top surface of the second microfluidic chip form a convex shape; the lower surface of the droplet is in contact with the convex shape; the microfluidic array is arranged between the optical axis and the image sensor; the direction of the light diffracted by the laser irradiating the optical axis is from the convex shape to the droplet;
[0009] The control component is used to control the voltage applied to the first microfluidic chip and the voltage applied to the second microfluidic chip, so that the first microfluidic chip and the second microfluidic chip are both in an infiltration state, and the droplet is pulled to both sides, and the upper surface of the droplet is concave due to the pulling, so that the droplet is in the shape of a concave lens, and the light diffracted by the laser irradiating the optical axis passes through the droplet;
[0010] The image sensor is used to capture a first grayscale image before the optical axis moves and a second grayscale image after the optical axis moves, wherein the first grayscale image and the second grayscale image are used to detect movement information of the optical axis.
[0011] Optionally, the microfluidic unit includes 7 three-dimensional figures, and the 7 three-dimensional figures constitute a hollow cube. The droplets are located inside the hollow cube, wherein one three-dimensional figure is the first microfluidic chip, and one three-dimensional figure is the second microfluidic chip, and there is a gap between the first microfluidic chip and the second microfluidic chip.
[0012] Optionally, one of the seven three-dimensional figures is a third microfluidic chip; the third microfluidic chip is adjacent to the first microfluidic chip; there is a gap between the third microfluidic chip and the first microfluidic chip; the convex shape is located between the top surface of the first microfluidic chip and the top surface of the second microfluidic chip;
[0013] The control component is specifically used to control the third microfluidic chip to apply voltage, and control the first microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplet is located on the surface of the third microfluidic chip, and the light diffracted by the laser irradiating the optical axis does not pass through the droplet; control the first microfluidic chip to apply voltage, and control the third microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplet moves from the surface of the third microfluidic chip to the top surface of the first microfluidic chip; control the second microfluidic chip to apply voltage, control the third microfluidic chip and the first microfluidic chip to not apply voltage, and control the power-on of the second microfluidic chip The pressure duration is a preset duration so that the droplet moves from the top surface of the first microfluidic chip to the convex shape; the third microfluidic chip, the first microfluidic chip and the second microfluidic chip are controlled not to be applied with voltage so that the droplet remains at the convex shape; the third microfluidic chip is controlled not to be applied with voltage, the first microfluidic chip is controlled to be applied with voltage, and the second microfluidic chip is controlled to be applied with voltage so that both the first microfluidic chip and the second microfluidic chip are in an infiltration state, and the droplet is pulled to both sides, and the upper surface of the droplet is depressed due to the pulling, so that the droplet is in the shape of a concave lens, and the light diffracted by the laser irradiating the optical axis passes through the droplet.
[0014] Optionally, the control component is also used to control the first microfluidic chip to apply voltage and control the third microfluidic chip and the second microfluidic chip to not apply voltage when the droplet is located at the protruding shape, so that the droplet moves from the protruding shape to the top surface of the first microfluidic chip; control the third microfluidic chip to apply voltage and control the first microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplet moves from the top surface of the first microfluidic chip to the surface of the third microfluidic chip, and the light diffracted by the laser irradiating the optical axis does not pass through the droplet.
[0015] Optionally, the four three-dimensional figures other than the first microfluidic chip, the second microfluidic chip and the third microfluidic chip among the seven three-dimensional figures are respectively a fourth microfluidic chip, a fifth microfluidic chip, a sixth microfluidic chip and a seventh microfluidic chip; and there are gaps between the seven three-dimensional figures;
[0016] The control component is also used to control each of the seven three-dimensional figures to apply voltage or not to apply voltage, so that the droplets move to the surface of the third microfluidic chip.
[0017] Optionally, the control component is specifically used to control each of the seven three-dimensional graphics to apply voltage or not apply voltage at preset time intervals, so that the droplets move to the surface of the third microfluidic chip.
[0018] Optionally, the control component is specifically used to uniformly control whether voltage is applied to each microfluidic chip in each microfluidic unit or not.
[0019] Optionally, the control component is specifically used to individually control whether each microfluidic chip in each of the microfluidic units is applied with voltage or not, controls the first microfluidic chip in the microfluidic unit within a preset range to be applied with voltage, and controls the second microfluidic chip in the microfluidic unit within a preset range to be applied with voltage, so that the droplets in the microfluidic units within the preset range are located at the convex shape, and the droplets are in the shape of a concave lens; controls the third microfluidic chip in the microfluidic unit outside the preset range in the microfluidic array to be applied with voltage, and controls the first microfluidic chip and the second microfluidic chip in the microfluidic unit outside the preset range in the microfluidic array not to be applied with voltage, so that the droplets in the microfluidic units outside the preset range in the microfluidic array are located on the surface of the third microfluidic chip.
[0020] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the present application sets a microfluidic array between the optical axis and the image sensor, and the top surface of the first microfluidic chip and the top surface of the second microfluidic chip in the microfluidic array form a convex shape. The control component controls the voltage applied to the first microfluidic chip and the second microfluidic chip, so that the first microfluidic chip and the second microfluidic chip are both in an infiltration state, and the droplet is pulled to both sides, and the lower surface of the droplet contacts the convex shape. The upper surface of the droplet forms a depression due to the pulling, so that the droplet is in the shape of a concave lens, which is equivalent to adding a concave lens before imaging, so that the monomer pattern generated after the laser irradiates the optical axis and diffracts becomes larger, and the fixed-area image sensor can collect more feature points of the overlapping parts, so it can more accurately determine whether it is really an overlapping pattern. The problem of low detection accuracy of the current optical axis movement detection is solved. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0023] Figure 1 It is a schematic diagram of the movement detection principle of the optical table axis in the prior art;
[0024] Figure 2 A top view of a microfluidic array in an embodiment of the present application;
[0025] Figure 3 is a cross-sectional view of a single microfluidic unit in an embodiment of the present application;
[0026] Figure 4 The schematic diagram of the movement detection principle of the optical table axis after adding the microfluidic array and droplets in the embodiment of the present application;
[0027] Figure 5 A cross-sectional view of a single microfluidic unit in a specific embodiment of the present application;
[0028] Figure 6 A schematic diagram of the position of the droplets when a voltage is applied to the third microfluidic chip and no voltage is applied to the first microfluidic chip and the second microfluidic chip;
[0029] Figure 7 Schematic diagram of the position of the droplets when voltage is applied to the first microfluidic chip and no voltage is applied to the third microfluidic chip and the second microfluidic chip;
[0030] Figure 8 A schematic diagram of the position of the droplets when the voltage is applied to the second microfluidic chip for a preset time and no voltage is applied to the third microfluidic chip and the first microfluidic chip;
[0031] Fig. 9 This is a schematic diagram of the positions of droplets when no voltage is applied to the third microfluidic chip, and voltage is applied to the first microfluidic chip and the second microfluidic chip. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0033] In an embodiment of the present application, there is provided an optical table axis movement detection device based on microfluidics to construct a concave lens, including a microfluidics array, a droplet, an image sensor and a control component;
[0034] The microfluidic array includes various microfluidic units; the microfluidic units include a first microfluidic chip and a second microfluidic chip; the bottom surface of the first microfluidic chip and the bottom surface of the second microfluidic chip are coplanar, and the top surface of the first microfluidic chip and the top surface of the second microfluidic chip form a convex shape; the lower surface of the droplet is in contact with the convex shape; the microfluidic array is arranged between the optical axis and the image sensor; the direction of the light after the laser irradiates the optical axis and diffracts is from the convex shape to the droplet;
[0035] A control component is used to control the voltage applied to the first microfluidic chip and the voltage applied to the second microfluidic chip, so that the first microfluidic chip and the second microfluidic chip are both in an infiltration state, and the droplet is pulled to both sides, and the upper surface of the droplet is depressed due to the pulling, so that the droplet is in the shape of a concave lens, and the light diffracted by the laser irradiation optical axis passes through the droplet;
[0036] The image sensor is used to collect a first grayscale image before the optical axis moves and a second grayscale image after the optical axis moves, wherein the first grayscale image and the second grayscale image are used to detect movement information of the optical axis.
[0037] like Figure 2 Shown is a top view of the microfluidic array. Figure 2 In the figure, circles represent droplets and squares represent microfluidic units. Figure 2 In the figure, the number of microfluidic units in the microfluidic array is only for illustration.
[0038] like Figure 3 Shown is a cross-sectional view of a single microfluidic unit. Figure 3 In the figure, the solid line with an arrow is the actual irradiation path of the light after diffraction from the optical axis of the laser irradiation through the first microfluidic chip, the second microfluidic chip and the droplets, and the dotted line with an arrow is the irradiation path of the light after diffraction from the optical axis of the laser irradiation when there are no droplets. Figure 3 In the embodiment, the direction of the light after diffraction from the laser irradiation optical axis is from the convex shape to the droplet, the lower surface of the droplet is in contact with the convex shape, the first microfluidic chip and the second microfluidic chip are both in an infiltration state, the droplet is pulled to both sides, and the upper surface of the droplet is depressed due to the pulling, and finally a concave lens is formed with the help of the convex shape formed by the top surface of the first microfluidic chip and the top surface of the second microfluidic chip, and the depression on the upper surface formed by pulling, thereby achieving the purpose of diverging the light and enlarging the graphic area of the light spot group.
[0039] Digital microfluidics is a technology that uses the dielectric wetting effect to precisely manipulate the generation, movement, and fusion of droplets. It has the advantages of high throughput, automation, low reagent requirements, and rapid response, and has been widely used in DNA preparation, molecular diagnosis, immunoassay, drug analysis, chemical experiments, etc. Droplets as small as nanoliters can now be manipulated. The dielectric wetting effect simply means changing the wettability of droplets by applying voltage. When no voltage is applied, the droplet is on the surface of a superhydrophobic material, with a very small contact angle, and will appear to be close to a spherical state. After the voltage is applied, the contact angle of the droplet increases, causing a pressure difference inside the droplet, which in turn causes the droplet to collapse, achieving the purpose of moving the droplet.
[0040] The droplets on the super-hydrophobic interface are natural convex lenses, and the entire microfluidic system is made of highly light-transmitting materials, with an overall light transmittance of over 95%. This means that digital microfluidics is a naturally excellent controllable lens. It can be used in existing optical systems with minimal effect on light intensity, while also converging or diverging the light path. The requirements for optical systems in existing electronic devices are increasing, with small size, low cost and high performance, among which the requirement for precision is of utmost importance. Using controllable microfluidics to assist optical systems can achieve higher precision at low cost, and is flexible and controllable. At present, there is no solution to use digital microfluidics to improve the accuracy of optical systems in electronic devices.
[0041] When no voltage is applied to the microfluidic chip, the droplets will remain approximately spherical when on the surface of the hydrophobic layer. When voltage is applied to the microfluidic chip, the droplets will undergo an electrowetting effect, which can be simply understood as the hydrophobic layer becoming a hydrophilic layer and the droplets will collapse. By cooperating with two microfluidic chips, droplet transport can be achieved. The smallest droplet can be picoliter-level, and the intermolecular force between the droplet and the microfluidic chip is greater than the weight of the droplet itself, so even if the droplet is placed vertically, it will not cause the droplet to flow down. The size of the droplet is at the micron level, and micron-level microfluidic chips can also be manufactured through existing display production lines or MEMS.
[0042] like Figure 4 As shown, it is a schematic diagram of the movement detection principle of the optical table axis after adding the microfluidic array and droplets in the embodiment of the present application. In fact, the image sensor is stationary, and the light spot group is moving. For ease of understanding, the coordinate system is switched, showing that the light spot group is stationary, and the image sensor is moving. Figure 4 In the figure, the laser irradiates the optical axis, and a group of light spots is generated within the imaging range. The solid rectangular frame is the first grayscale image before the optical axis moves, and the dotted rectangular frame is the second grayscale image after the optical axis moves. The overlapping area of the first grayscale image and the second grayscale image is the same pattern area before and after the optical axis moves. The solid circle in the overlapping area is a schematic diagram of the sampling point. Figure 4 9 sampling points are shown in the figure, but there are actually more than these 9 points. Take the sampling points in the dotted ellipse as an example, Figure 4 There are three sampling points in the dotted ellipse frame collected on the light spot. The moving direction of the optical axis can be detected based on the first grayscale image and the second grayscale image. Figure 1 Compare, Figure 4 Microfluidic arrays have been added. Figure 4 The droplets are not drawn. For the specific relationship between the microfluidic array and the droplets, see Figure 2 and Figure 3 .from Figure 1 and Figure 4 It can be seen that Figure 4 The area of the light spot group in the image is enlarged. After adding the microfluidic array, the diffusion effect is turned on by default, then the area of a single light spot will be enlarged, and the area of the light spot group will also be enlarged. Figure 1 There are two sampling points in the dotted ellipse frame collected on the light spot, and Figure 4 There are 3 sampling points in the dotted ellipse frame collected on the light spot. Figure 4 It is possible to better judge whether the position is a truly overlapping part or just a similar part, thereby improving the accuracy of movement judgment.
[0043] In a specific embodiment, the microfluidic unit includes 7 three-dimensional figures, which form a hollow cube, and the droplets are located inside the hollow cube, wherein one three-dimensional figure is a first microfluidic chip, and one three-dimensional figure is a second microfluidic chip, and there is a gap between the first microfluidic chip and the second microfluidic chip. Figure 5 As shown, it is a cross-sectional view of a single microfluidic unit in a specific embodiment of the present application. Figure 5 Only 5 three-dimensional figures are shown. Figure 5 In the video, the droplet is inside a hollow cube. The hollow cube structure can prevent the droplet from flying away due to excessive vibration of the electronic watch.
[0044] In a specific embodiment, one of the seven three-dimensional figures is a third microfluidic chip; the third microfluidic chip is adjacent to the first microfluidic chip; there is a gap between the third microfluidic chip and the first microfluidic chip; the convex shape is located between the top surface of the first microfluidic chip and the top surface of the second microfluidic chip;
[0045] The control component is specifically used to control the third microfluidic chip to apply voltage, and control the first microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplets are located on the surface of the third microfluidic chip, and the light diffracted by the laser irradiation optical axis does not pass through the droplets; control the first microfluidic chip to apply voltage, and control the third microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplets move from the surface of the third microfluidic chip to the top surface of the first microfluidic chip; control the second microfluidic chip to apply voltage, control the third microfluidic chip and the first microfluidic chip to not apply voltage, and control the second microfluidic chip to apply voltage The pressure duration is a preset duration so that the droplet moves from the top surface of the first microfluidic chip to the convex shape; the third microfluidic chip, the first microfluidic chip and the second microfluidic chip are controlled not to apply voltage so that the droplet remains at the convex shape; the third microfluidic chip is controlled not to apply voltage, the first microfluidic chip is controlled to apply voltage, and the second microfluidic chip is controlled to apply voltage so that both the first microfluidic chip and the second microfluidic chip are in an infiltration state, and the droplet is pulled to both sides, and the upper surface of the droplet is depressed due to the pulling, so that the droplet is in the shape of a concave lens, and the light diffracted by the laser irradiation optical axis passes through the droplet.
[0046] like Figure 6 As shown in FIG. 1 , it is a schematic diagram of the position of the droplets when the voltage is applied to the third microfluidic chip and the voltage is not applied to the first microfluidic chip and the second microfluidic chip. Figure 7 As shown in FIG. 1 , it is a schematic diagram of the position of the droplets when the voltage is applied to the first microfluidic chip and the voltage is not applied to the third microfluidic chip and the second microfluidic chip. Figure 8 As shown in FIG. 1 , it is a schematic diagram of the position of the droplets when the voltage is applied to the second microfluidic chip for a preset time and the voltage is not applied to the third microfluidic chip and the first microfluidic chip. Fig. 9 , which is a schematic diagram of the positions of droplets when no voltage is applied to the third microfluidic chip and voltage is applied to the first microfluidic chip and the second microfluidic chip.
[0047] The initial state is Figure 6 , voltage is applied to the third microfluidic chip, while no voltage is applied to the first microfluidic chip and the second microfluidic chip. The droplets will be adsorbed on the surface of the third microfluidic chip due to the electrowetting effect. The light diffracted by the laser irradiating the optical axis will not pass through the droplets and will not affect the linear propagation of the light. Figure 7 , voltage is applied to the first microfluidic chip, while no voltage is applied to the third microfluidic chip and the second microfluidic chip. At this time, the first microfluidic chip becomes a wetting state, and the droplets on the third microfluidic chip will be pulled onto the first microfluidic chip. Figure 8, the second microfluidic chip is powered on, while the third microfluidic chip and the first microfluidic chip are not powered on. At this time, the second microfluidic chip becomes wetted, and the droplets on the first microfluidic chip begin to be pulled onto the second microfluidic chip. At this time, we need to control the duration of voltage application on the second microfluidic chip so that the droplets are not completely pulled to the second microfluidic chip, but stay in the middle of the top surface of the first microfluidic chip and the top surface of the second microfluidic chip, that is, in the convex shape. After that, the third microfluidic chip, the first microfluidic chip, and the second microfluidic chip are all powered off to keep the droplets in the convex shape.
[0048] The preset duration can be simulated in advance using COMSOL software. A brief introduction to COMSOL software is that it is a finite element simulation software with professional analysis capabilities in the fields of electromagnetics, structures, acoustics, fluid flow, heat transfer, and chemical engineering, and is widely used in the field of digital microfluidics. It can simulate the static and dynamic performance of digital microfluidic systems, simulate the potential distribution of the system, analyze the influence of parameters such as the thickness of the dielectric layer on the digital microfluidic chip, and simulate the movement of microdroplets based on parameters such as droplet density, viscosity, substrate structure, dielectric layer performance, and hydrophobic layer performance. The size of the applied voltage can also be simulated in advance using COMSOL software.
[0049] Fig. 9 , the third microfluidic chip is not voltaged, the first microfluidic chip and the second microfluidic chip are voltaged, at this time the first microfluidic chip and the second microfluidic chip are both in the infiltration state, which will pull the droplets on the top to both sides, and finally form a concave lens with the help of the existing convex shape and the upper surface depression formed by pulling, so as to achieve the purpose of diverging light. Specific parameters are set to make the droplets maintain this concave lens state. The specific parameters can be obtained in advance through COMSOL software simulation, for example, the voltage range is 5V to 15V, the droplet volume is 3 to 5 microliters, and the microfluidic chip adopts a single-sided electrode structure.
[0050] Moreover, by applying different voltages, the extent to which the droplets are pulled is different, and the curvature of the upper surface will change, thereby achieving controllable changes in the magnification. The first microfluidic chip can be controlled to apply voltage at a first preset voltage value, and the second microfluidic chip can be controlled to apply voltage at a second preset voltage value, so that the droplets can magnify the light spot at a preset magnification. The first preset voltage value, the second preset voltage value, and the preset magnification can be obtained in advance through COMSOL software simulation.
[0051] In a specific embodiment, the control component is also used to control the first microfluidic chip to apply voltage and control the third microfluidic chip and the second microfluidic chip to not apply voltage when the droplet is located at the protruding shape, so that the droplet moves from the protruding shape to the top surface of the first microfluidic chip; control the third microfluidic chip to apply voltage and control the first microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplet moves from the top surface of the first microfluidic chip to the surface of the third microfluidic chip, and the light diffracted by the laser irradiation optical axis does not pass through the droplet.
[0052] Pass in sequence Fig. 9 , Figure 8 , Figure 7 , Figure 6 The operation provides the option of not using a concave lens, so that the droplet can return to the surface of the third microfluidic chip. This provides a more flexible option for the application of this solution, either using a concave lens or not. The microdroplets are very small, so the entire operation process is actually very fast, usually requiring a high-speed camera to capture.
[0053] In a specific embodiment, the four three-dimensional figures other than the first microfluidic chip, the second microfluidic chip and the third microfluidic chip among the seven three-dimensional figures are respectively the fourth microfluidic chip, the fifth microfluidic chip, the sixth microfluidic chip and the seventh microfluidic chip; there are gaps between the seven three-dimensional figures;
[0054] The control component is also used to control each of the seven three-dimensional graphics to apply voltage or not to apply voltage, so that the droplets move to the surface of the third microfluidic chip.
[0055] The seven three-dimensional figures are all microfluidic chips. When droplets run to four of the seven three-dimensional figures except the first microfluidic chip, the second microfluidic chip and the third microfluidic chip due to excessive vibration, or are broken into small droplets and fly to four of the seven three-dimensional figures except the first microfluidic chip, the second microfluidic chip and the third microfluidic chip, the droplets can be finally gathered and moved to the surface of the third microfluidic chip by controlling each of the seven three-dimensional figures to add voltage or not add voltage.
[0056] In a specific embodiment, the control component is specifically used to control each of the seven three-dimensional graphics to apply voltage or not apply voltage every preset time period, so that the droplets move to the surface of the third microfluidic chip.
[0057] A fixed droplet recovery process is performed periodically to ensure that the droplets are located on the surface of the third microfluidic chip.
[0058] In a specific embodiment, the control component is specifically used to uniformly control whether voltage is applied to each microfluidic chip in each microfluidic unit or not.
[0059] In a specific embodiment, the control component is specifically used to individually control each microfluidic chip in each microfluidic unit to apply voltage or not, control the first microfluidic chip in the microfluidic unit within the preset range to apply voltage, and control the second microfluidic chip in the microfluidic unit within the preset range to apply voltage, so that the droplets in the microfluidic unit within the preset range are located at the convex shape, and the droplets are in the shape of a concave lens; control the third microfluidic chip in the microfluidic unit outside the preset range in the microfluidic array to apply voltage, and control the first microfluidic chip and the second microfluidic chip in the microfluidic unit outside the preset range in the microfluidic array not to apply voltage, so that the droplets in the microfluidic unit outside the preset range in the microfluidic array are located on the surface of the third microfluidic chip. The droplets in the microfluidic unit within the preset range are located at the convex shape, the droplets are in the shape of a concave lens, and the droplets in the microfluidic unit outside the preset range in the microfluidic array are located on the surface of the third microfluidic chip, and the microfluidic units and droplets within the preset range play a role of local amplification.
[0060] In summary, the present application sets a microfluidic array between the optical axis and the image sensor, the top surface of the first microfluidic chip and the top surface of the second microfluidic chip in the microfluidic array form a convex shape, and the control component controls the voltage applied to the first microfluidic chip and the second microfluidic chip, so that the first microfluidic chip and the second microfluidic chip are both in an infiltration state, and the droplets are pulled to both sides, the lower surface of the droplets contacts the convex shape, and the upper surface of the droplets is depressed due to the pulling, so that the droplets are in the shape of a concave lens, which is equivalent to adding a concave lens before imaging, so that the monomer pattern generated after the laser irradiates the optical axis and diffracts becomes larger, and the fixed-area image sensor can collect more feature points of the overlapping parts, so it can more accurately determine whether it is really an overlapping pattern. The problem of low detection accuracy of the current optical axis movement detection is solved.
[0061] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0062] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.
Claims
1. An optical table axis movement detection device based on microfluidics to construct a concave lens, characterized in that: Includes microfluidic arrays, droplets, image sensors, and control components; The microfluidic array includes various microfluidic units; the microfluidic units include a first microfluidic chip and a second microfluidic chip; the bottom surface of the first microfluidic chip and the bottom surface of the second microfluidic chip are coplanar, and the top surface of the first microfluidic chip and the top surface of the second microfluidic chip form a convex shape; The lower surface of the droplet is in contact with the convex shape; the microfluidic array is arranged between the optical axis and the image sensor; the direction of the light diffracted by the laser irradiating the optical axis is from the convex shape to the droplet; The control component is used to control the voltage applied to the first microfluidic chip and the voltage applied to the second microfluidic chip, so that the first microfluidic chip and the second microfluidic chip are both in an infiltration state, and the droplet is pulled to both sides, and the upper surface of the droplet is concave due to the pulling, so that the droplet is in the shape of a concave lens, and the light diffracted by the laser irradiating the optical axis passes through the droplet; The image sensor is used to capture a first grayscale image before the optical axis moves and a second grayscale image after the optical axis moves, wherein the first grayscale image and the second grayscale image are used to detect movement information of the optical axis.
2. The optical table axis movement detection device based on microfluidic construction of concave lens according to claim 1 is characterized in that: The microfluidic unit includes 7 three-dimensional figures, which constitute a hollow cube. The droplets are located inside the hollow cube, wherein one three-dimensional figure is the first microfluidic chip, and one three-dimensional figure is the second microfluidic chip, and there is a gap between the first microfluidic chip and the second microfluidic chip.
3. The optical table axis movement detection device based on microfluidic construction of concave lens according to claim 2 is characterized in that: One of the seven three-dimensional figures is a third microfluidic chip; the third microfluidic chip is adjacent to the first microfluidic chip; there is a gap between the third microfluidic chip and the first microfluidic chip; the convex shape is located between the top surface of the first microfluidic chip and the top surface of the second microfluidic chip; The control component is specifically used to control the third microfluidic chip to apply voltage, and control the first microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplet is located on the surface of the third microfluidic chip, and the light diffracted by the laser irradiating the optical axis does not pass through the droplet; control the first microfluidic chip to apply voltage, and control the third microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplet moves from the surface of the third microfluidic chip to the top surface of the first microfluidic chip; control the second microfluidic chip to apply voltage, control the third microfluidic chip and the first microfluidic chip to not apply voltage, and control the power-on of the second microfluidic chip The pressure duration is a preset duration so that the droplet moves from the top surface of the first microfluidic chip to the convex shape; the third microfluidic chip, the first microfluidic chip and the second microfluidic chip are controlled not to be applied with voltage so that the droplet remains at the convex shape; the third microfluidic chip is controlled not to be applied with voltage, the first microfluidic chip is controlled to be applied with voltage, and the second microfluidic chip is controlled to be applied with voltage so that both the first microfluidic chip and the second microfluidic chip are in an infiltration state, and the droplet is pulled to both sides, and the upper surface of the droplet is depressed due to the pulling, so that the droplet is in the shape of a concave lens, and the light diffracted by the laser irradiating the optical axis passes through the droplet.
4. The optical table axis movement detection device based on microfluidic construction of concave lens according to claim 3 is characterized in that: The control component is also used to control the first microfluidic chip to apply voltage and control the third microfluidic chip and the second microfluidic chip to not apply voltage when the droplet is located at the convex shape, so that the droplet moves from the convex shape to the top surface of the first microfluidic chip; control the third microfluidic chip to apply voltage and control the first microfluidic chip and the second microfluidic chip to not apply voltage, so that the droplet moves from the top surface of the first microfluidic chip to the surface of the third microfluidic chip, and the light diffracted by the laser irradiating the optical axis does not pass through the droplet.
5. The optical table axis movement detection device based on microfluidic construction of concave lens according to claim 3 is characterized in that: The four three-dimensional figures other than the first microfluidic chip, the second microfluidic chip and the third microfluidic chip among the seven three-dimensional figures are respectively the fourth microfluidic chip, the fifth microfluidic chip, the sixth microfluidic chip and the seventh microfluidic chip; there are gaps between the seven three-dimensional figures; The control component is also used to control each of the seven three-dimensional figures to apply voltage or not to apply voltage, so that the droplets move to the surface of the third microfluidic chip.
6. The optical table axis movement detection device based on microfluidic construction of concave lens according to claim 5 is characterized in that: The control component is specifically used to control each of the seven three-dimensional graphics to apply voltage or not apply voltage at preset time intervals, so that the droplets move to the surface of the third microfluidic chip.
7. The optical table axis movement detection device based on microfluidic construction of concave lens according to claim 4 is characterized in that: The control component is specifically used to uniformly control each microfluidic chip in each microfluidic unit to apply voltage or not apply voltage.
8. The optical table axis movement detection device based on microfluidic construction of concave lens according to claim 4 is characterized in that: The control component is specifically used to individually control whether each microfluidic chip in each microfluidic unit is applied with voltage or not, control the first microfluidic chip in the microfluidic unit within a preset range to apply voltage, and control the second microfluidic chip in the microfluidic unit within a preset range to apply voltage, so that the droplets in the microfluidic units within the preset range are located at the convex shape, and the droplets are in the shape of a concave lens; control the third microfluidic chip in the microfluidic unit outside the preset range in the microfluidic array to apply voltage, and control the first microfluidic chip and the second microfluidic chip in the microfluidic unit outside the preset range in the microfluidic array not to apply voltage, so that the droplets in the microfluidic units outside the preset range in the microfluidic array are located on the surface of the third microfluidic chip.