Electronic control fine focusing imaging system based on optical microscope

Abstract

The utility model provides an electronic control fine focusing imaging system based on an optical microscope. The electronic control fine focusing imaging system comprises a focusing displacement table, an imaging module, an imaging base, an objective table, a coarse focusing hand wheel, a fine focusing hand wheel and a microscope body, the microscope body comprises a longitudinal supporting part, a bottom supporting part and a transverse supporting part, one end of the bottom supporting part is connected with the lower end of the longitudinal supporting part, and one end of the transverse supporting part is connected with the upper end of the longitudinal supporting part; the objective table is arranged between the bottom supporting part and the transverse supporting part and is connected with the longitudinal supporting part; the focusing displacement table is connected to the transverse supporting part through the imaging base; the focusing displacement table comprises a sliding seat; the displacement direction of the sliding seat is perpendicular to the objective table; and the imaging module is mounted on the sliding seat, is parallel to the displacement direction of the sliding seat, and is used for performing up-down focusing movement under the driving of the focusing displacement table. According to the utility model, the problems of clamping, abnormal sound and improper displacement which are easily caused by non-coaxiality during electric focusing are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of multi-axis automatic electronically controlled optical microscopy digital image imaging systems, specifically to an electronically controlled fine-tuning focusing imaging system based on an optical microscope. Background Technology

[0002] A significant portion of current multi-axis automated electronically controlled optical microscopy digital imaging systems are based on conventional optical microscope systems to leverage the microscope's superior imaging quality. These systems typically connect the stage translation and focusing axis focusing operations to the original manual adjustment mechanism via a motor drive module, thus achieving automatic platform translation and focusing displacement. A major problem with this approach is that the external drive device cannot exert a significant radial force on the original focusing axis for focusing. This can lead to a deflection torque on the focusing axis, damaging the focusing mechanism or reducing its operational stability.

[0003] For example, the most common solution is to connect the drive motor coaxially to the focusing shaft via a coupling. In actual operation, due to varying levels of machining and assembly precision, it is difficult for the motor shaft and the focusing shaft to achieve coaxiality. This results in a large deflection torque on the focusing shaft at some angular positions during motor rotation. In high-frequency focusing applications, problems may appear after only a few months, manifesting as: abnormal noises during electric focusing, blockage or sluggishness during rotation at certain angles, and in severe cases, wear and breakage of the focusing shaft or internal transmission components. Utility Model Content

[0004] The purpose of this invention is to provide an electrically controlled micro-focusing imaging system based on an optical microscope. Instead of using the original microscope focusing shaft for electrically controlled focusing, it uses the displacement of the driving imaging module to solve the problems of jamming, abnormal noise, and incomplete displacement that easily occur during electric focusing in the scheme where the drive motor is coaxially connected to the focusing shaft through a coupling.

[0005] This utility model provides an electronically controlled fine-tuning focusing imaging system based on an optical microscope, including a focusing displacement stage, an imaging module, an imaging base, a stage, a coarse focusing handwheel, a fine focusing handwheel, and a microscope body;

[0006] The microscope body includes a longitudinal support, a bottom support, and a transverse support. One end of the bottom support is connected to the lower end of the longitudinal support, and one end of the transverse support is connected to the upper end of the longitudinal support. The stage is located between the bottom support and the transverse support and is connected to the longitudinal support.

[0007] The focusing displacement stage is connected to the transverse support via the imaging base; the focusing displacement stage includes a slide; the displacement direction of the slide is perpendicular to the stage; the imaging module is mounted on the slide, parallel to the displacement direction of the slide, and is used to perform up and down focusing motion under the drive of the focusing displacement stage.

[0008] Furthermore, the imaging module consists of an objective lens, a receiver tube, and a camera.

[0009] Furthermore, the coarse focus adjustment handwheel and the fine focus adjustment handwheel are located at the lower part of the longitudinal support.

[0010] Furthermore, the focusing displacement stage is a small-lead ball screw displacement stage, driven by a geared stepper motor or a servo motor.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1) This utility model completely avoids the problems of jamming, abnormal noise, and incomplete displacement that easily occur during electric focusing when the drive motor is coaxially connected to the focusing shaft through a coupling.

[0013] 2) This utility model has significant advantages in reducing product maintenance costs:

[0014] The focusing stage of this invention has a very short daily working stroke, at most 1-2 mm, with wear occurring only within this fixed short segment. In contrast, the minimum effective stroke of a typical focusing stage is at least 20 mm. Therefore, even if wear occurs after a certain period of use, leading to inaccurate positioning, the actual working stroke of the focusing stage can be shifted to another segment of its effective stroke by simply replacing the imaging base with one a few millimeters thicker. This restores the focusing stage's accuracy to its original state. Because the ball screw structure itself is very durable, this interchangeable design ensures that the microscopic imaging system does not require replacement of the electronically controlled focusing components throughout its entire lifespan (10-20 years). Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure label:

[0017] 1-Focusing stage; 2-Imaging module; 3-Imaging base; 4-Particle stage; 5-Coarse focusing handwheel; 6-Fine focusing handwheel; 7-Microscope body. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0019] The focusing process of a microscope involves adjusting the distance between the objective surface and the objective lens to achieve a clear focus. Conventional microscopes use a focusing axis to drive the stage up and down for focusing. Once coarse focusing is achieved, for standard 4x or higher objectives, fine focusing typically requires only a 1mm travel distance. However, this very fine-tuning travel is the most frequently used component in electronically controlled digital imaging systems. This embodiment transfers this fine-tuning travel to the overall displacement of the imaging module (objective lens-mount-camera assembly) to achieve the fine-tuning process.

[0020] like Figure 1 As shown, an electrically controlled micro-focusing imaging system based on an optical microscope (a microscopic imaging system with an imaging module displacement stage) includes a focusing displacement stage 1, an imaging module 2, an imaging base 3, a stage 4, a coarse focusing handwheel 5, a fine focusing handwheel 6, and a microscope body 7. The microscope body 7 includes a longitudinal support, a bottom support, and a transverse support. One end of the bottom support is connected to the lower end of the longitudinal support, and one end of the transverse support is connected to the upper end of the longitudinal support. The stage 4 is located between the bottom support and the transverse support and is connected to the longitudinal support. The focusing displacement stage 1 is connected to the transverse support through the imaging base 3. The focusing displacement stage 1 includes a slide. The displacement direction of the slide is perpendicular to the stage 4. The imaging module 2 is mounted on the slide, parallel to the displacement direction of the slide, and is used for vertical focusing movement driven by the focusing displacement stage 1.

[0021] When actually acquiring sample images using this electronically controlled micro-focusing imaging system, manual focusing is first used until the image is basically clear. Then, subsequent acquisitions are all based on the micro-displacement of the focusing displacement stage for precise electronically controlled focusing operations. This is stable and reliable, and there will be no lag or stalling phenomena that occur when directly driving the focusing axis, which can lead to incomplete movement.

[0022] In this embodiment, the imaging module 2 consists of an objective lens, a receiver tube, and a camera. The imaging base 3 is located on the original microscope as the observation component (trino / binocular head), which is a positioning surface. Replacing it with the imaging base 3 ensures that the displacement direction of the upper focusing stage 1 is perpendicular to the stage 4, thereby making the optical axis of the imaging module perpendicular to the stage 4.

[0023] In this embodiment, the coarse focusing handwheel 5 and the fine focusing handwheel 6 are located at the lower part of the longitudinal support. The coarse focusing wheel 5 and the fine focusing wheel 6 retain their original manual function and no longer participate in electronic focusing.

[0024] In this embodiment, the focusing displacement stage 1 adopts an existing high-precision short-stroke small-lead ball screw displacement stage, driven by a geared stepper motor or servo motor. Typical parameters include a lead of 2mm, a motor reduction ratio of 10, a stepper motor step count of 200 steps per revolution, a microstepping scale of 32, and a theoretical single-step movement length of 2000um / (200*32*10)=0.03125um.

[0025] This electrically controlled fine-focusing imaging system based on an optical microscope has the following technical advantages:

[0026] 1) This utility model completely avoids the problems of jamming, abnormal noise, and incomplete displacement that easily occur during electric focusing when the drive motor is coaxially connected to the focusing shaft through a coupling.

[0027] 2) This utility model has significant advantages in reducing product maintenance costs:

[0028] The focusing stage of this invention has a very short daily working stroke, at most 1-2 mm, with wear occurring only within this fixed short segment. In contrast, the minimum effective stroke of a typical focusing stage is at least 20 mm. Therefore, even if wear occurs after a certain period of use, leading to inaccurate positioning, the actual working stroke of the focusing stage can be shifted to another segment of its effective stroke by simply replacing the imaging base with one a few millimeters thicker. This restores the focusing stage's accuracy to its original state. Because the ball screw structure itself is very durable, this interchangeable design ensures that the microscopic imaging system does not require replacement of the electronically controlled focusing components throughout its entire lifespan (10-20 years).

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. An electronically controlled micro-focusing optical microscope-based imaging system, characterized in that, The microscope comprises a focusing displacement table (1), an imaging module (2), an imaging base (3), a carrier table (4), a coarse focusing hand wheel (5), a fine focusing hand wheel (6), and a microscope body (7). The microscope body (7) comprises a longitudinal support part, a bottom support part, and a transverse support part, one end of the bottom support part is connected with the lower end of the longitudinal support part, and one end of the transverse support part is connected with the upper end of the longitudinal support part; the carrier table (4) is arranged between the bottom support part and the transverse support part and is connected with the longitudinal support part. The focusing displacement table (1) is connected to the transverse support part through the imaging base (3); the focusing displacement table (1) comprises a sliding base; the displacement direction of the sliding base is perpendicular to the carrier table (4); the imaging module (2) is installed on the sliding base and parallel to the displacement direction of the sliding base, and is used for performing up-down focusing movement under the driving of the focusing displacement table (1).

2. The electronically controlled microfocus microscopy imaging system based on optical microscopy according to claim 1, characterized in that, The imaging module (2) is composed of an objective lens, a lens barrel, and a camera.

3. The electronically controlled microfocus microscopy imaging system based on optical microscopy according to claim 1, wherein, The coarse focusing hand wheel (5) and the fine focusing hand wheel (6) are arranged at the lower part of the longitudinal support part.

4. The electronically controlled microfocus microscopy imaging system based on optical microscopy according to claim 1, wherein, The focusing displacement table (1) adopts a small-lead ball screw displacement table and is driven by a deceleration stepper motor or a servo motor.

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