Phase difference bright field switching switching device
Patent Information
- Application Number
- CN202522339684.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2026-10-13
- Estimated Expiration
- 2035-11-04
AI Technical Summary
[0003]现有的成像仪在使用时首先需要打开照明，切换需要的相差物镜，切换对应的相差环板，然后使用对中望远镜调节相差环板的中心位置，再手移样品到需要查看的视野，调焦观测；当需要切换不同倍数的相差物镜时，需要再切换对应的相差环板，重新调节环板的位置，长时间的频繁重复操作及观察样品，效率低下很容易造成使用人员的身体疲劳
[0013]本实用新型具有以下有益效果：本实用新型所提供的一种相差明场切换切换装置：
Smart Images
Figure CN224851431U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of microscope illumination technology, specifically to a phase difference bright field switching device. Background Technology
[0002] Microscopic phase contrast observation utilizes the differences in refractive index and thickness between different structural components of an object to convert the optical path difference passing through different parts of the object into a difference in amplitude. Observation is achieved through a condenser lens with an annular aperture and a phase contrast objective lens with a phase plate. It usually consists of four parts: a light source, an eyepiece, an objective lens, and a focusing bracket. The light source consists of a condenser lens with an annular aperture and an LED. The centering is adjusted in real time by horizontally switching different annular apertures and manually turning the adjusting screw to observe the overlap of the annular plates.
[0003] Existing imagers require several steps to operate. First, illumination must be turned on, the desired phase contrast objective lens and corresponding phase contrast ring plate switched. Then, the centering telescope is used to adjust the ring plate's position, and the sample is manually moved to the desired field of view for focusing. Switching to different magnification phase contrast objectives necessitates switching the corresponding ring plate and readjusting its position. This frequent repetition of operations and sample observations over extended periods is inefficient and easily leads to user fatigue. Furthermore, phase contrast objectives from different manufacturers typically have inconsistent annular aperture sizes, requiring the selection of individual ring plates. This lack of standardization necessitates the use of multiple ring plates, resulting in a large footprint for the ring plate switching mechanism. This situation requires further improvement. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a phase difference bright field switching device.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a phase difference bright field switching device, including a light source module for providing and converging light, an adjustment module for switching the light transmission area and bending the light path, and a condenser lens for converging the light output by the adjustment module; The adjustment module includes a reflector mount, a phase difference ring plate mounted on the reflector mount, a ring plate switching plate that can slide laterally on the reflector mount, and a reflector prism mounted on the reflector mount. The phase difference ring plate is fixed in position. The ring plate switching plate can selectively make the annular area or the central area of the phase difference ring plate transparent by sliding laterally, so as to realize the switching between phase difference mode and bright field mode. The reflective prism is used to bend the light output by the light source module and transmit it to the condenser lens.
[0006] Furthermore, the outer end face of the phase difference ring plate is dovetail groove-shaped, and the reflector seat is provided with a circular groove that matches the dovetail groove shape. The phase difference ring plate is assembled with the circular groove, and the bottom of the phase difference ring plate is provided with an installation groove. A spring steel wire is placed in the installation groove. After assembly, the spring steel wire is in a bent state and is used to provide an upward restoring force to the phase difference ring plate.
[0007] Furthermore, the top of the reflector mount is provided with at least two adjusting screws, which are arranged radially along the circular groove and are used to finely adjust the position of the phase difference ring plate relative to the axis of the circular groove.
[0008] Furthermore, the ring plate switching plate slides in the left and right direction. When the ring plate switching plate slides to the left, the annular area of the phase ring plate is light-transmitting and the central area is light-blocking; when the ring plate switching plate slides to the right, the central area of the phase ring plate is light-transmitting and the annular area is light-blocking.
[0009] Furthermore, the adjustment module also includes a ring plate limiting plate, which is fixedly connected to the reflector mount to prevent the ring plate switching plate from falling out of the transverse groove of the reflector mount.
[0010] Furthermore, the adjustment module also includes a pressure plate, and the reflector seat is provided with a limiting groove for placing the reflector prism. The pressure plate is fixedly connected to the reflector seat to fix the reflector prism in the limiting groove.
[0011] Furthermore, the light source module includes a heat sink, LED lights, a lens barrel, and a light-collecting lens assembly; The LED light is connected to the heat sink. The front end of the heat sink is cylindrical and fits into the round hole of the lens barrel. The lens barrel has a fixing groove, and the light-collecting lens assembly is placed in the fixing groove and glued to the lens barrel.
[0012] Furthermore, the condenser lens includes a substrate, a condenser lens tube, and a condenser lens assembly. The condenser lens assembly is placed in a circular groove in the condenser lens tube and glued and fixed to the condenser lens tube. The condenser lens tube and the substrate are fixed by a threaded connection, and the adjustment module is locked to the substrate by screws.
[0013] The present invention has the following beneficial effects: The phase difference bright field switching device provided by the present invention: (1) The phase difference and bright field modes can be quickly switched by sliding the ring plate switching plate laterally, without the need to frequently replace or adjust the phase difference ring plate; and the position of the phase difference ring plate is fixed after fine adjustment, so there is no need to repeatedly adjust the center position when switching modes, which greatly reduces the operation steps, reduces operator fatigue, and improves observation efficiency. (2) By bending the optical path through the reflective prism and utilizing the space at the rear of the equipment, the axial length of the optical path is effectively shortened, the overall height of the equipment is reduced, and it can be better connected to various customized microscope systems to meet the needs of equipment miniaturization. (3) The dovetail groove, spring steel wire and double adjusting screw structure can achieve precise fine adjustment of the phase difference ring plate. After fine adjustment, the position is stable and is not affected by the sliding of the ring plate switching plate. This ensures that the center of the ring beam is aligned with the center of the objective lens phase plate during phase difference observation, thus guaranteeing the imaging quality. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the adjustment module in this utility model. Figure 1 ; Figure 4 This is a cross-sectional view of the adjustment module in this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the optical path principle of this utility model; Figures 1 to 5 The reference numerals in the attached figures are respectively: 1-light source module, 2-adjustment module, 3-condenser lens; 10-Heat sink, 11-LED light, 12-Lens barrel, 13-Light-collecting lens assembly; 20-Reflector mount, 21-Phase difference ring plate, 22-Ring plate switching plate, 23-Reflecting prism, 24-Spring steel wire, 25-Adjusting screw, 26-Ring plate limiting plate; 30-Substrate, 31-Condenser lens tube, 32-Condenser lens assembly. Detailed Implementation
[0015] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0016] like Figures 1 to 4 As shown, a phase difference bright field switching device includes a light source module 1 for providing and converging light, an adjustment module 2 for switching the light transmission area and bending the light path, and a condenser lens 3 for converging the light output from the adjustment module 2. The adjustment module 2 includes a reflector mount 20, a phase difference ring plate 21 disposed on the reflector mount 20, a ring plate switching plate 22 slidably disposed on the reflector mount 20, and a reflecting prism 23 disposed on the reflector mount 20. The phase difference ring plate 21 is fixed in position. The ring plate switching plate 22 can selectively transmit light to the annular area or the central area of the phase difference ring plate 21 by sliding laterally, so as to realize the switching between phase difference mode and bright field mode. The reflecting prism 23 is used to bend the light output from the light source module 1 and transmit it to the condenser lens 3. The gap between the overlapping areas of the phase difference ring plate and the ring plate switching plate is greater than 0.5mm. Specifically, the ring plate switching plate 22 is placed in the lateral groove of the reflector mount 20 and slides in the left and right direction. When the ring plate switching plate 22 slides to the left, the annular area of the phase difference ring plate 21 transmits light and the central area blocks light, which is used for phase difference; when the ring plate switching plate 22 slides to the right, the central area of the phase difference ring plate 21 transmits light and the annular area blocks light, which is used for bright field.
[0017] In this embodiment, the outer end face of the phase difference ring plate 21 is dovetail groove shaped, and the reflector seat 20 is provided with a circular groove that matches the dovetail groove shape. The phase difference ring plate 21 is assembled with the circular groove. The trapezoidal structure of the dovetail groove has natural anti-detachment and guiding characteristics, which can limit the axial movement of the phase difference ring plate 21 after assembly, prevent it from falling off along the axis of the circular groove, and at the same time ensure that the phase difference ring plate 21 can only move along the radial direction of the circular groove (i.e., the axis adjustment direction), thus limiting the range of motion for subsequent precise fine adjustment.
[0018] The phase difference ring plate 21 has a mounting groove at its bottom, in which a spring steel wire 24 is placed. After assembly, the spring steel wire 24 is in a bent state, which provides an upward restoring force to the phase difference ring plate 21. This force acts directly on the bottom of the phase difference ring plate 21, pushing the dovetail groove-shaped outer end face of the phase difference ring plate 21 to fit tightly against the inner wall of the circular groove of the reflector seat 20, eliminating the assembly gap between the phase difference ring plate 21 and the circular groove, and preventing the ring plate from loosening or shaking due to the gap. At the same time, the continuous tightening force of the spring steel wire 24 provides support for the subsequent fine adjustment and locking of the adjusting screw 25.
[0019] The top of the reflector mount 20 is provided with at least two adjusting screws 25, which are arranged radially along the circular groove and are used to finely adjust the position of the phase difference ring plate 21 relative to the axis of the circular groove. By tightening or loosening the adjusting screws 25, a radial thrust can be applied. When one screw is tightened, the screw pushes the phase difference ring plate 21 to the other side; when the corresponding screw is loosened, the restoring force of the spring steel wire 24 can assist the ring plate to return to its original position, thereby realizing the small displacement adjustment of the phase difference ring plate 21 relative to the axis of the circular groove.
[0020] In this embodiment, the adjustment module 2 also includes a ring plate limiting plate 26, which is fixedly connected to the reflector seat 20 to prevent the ring plate switching plate 22 from falling out of the transverse groove of the reflector seat 20.
[0021] In this embodiment, the adjustment module 2 further includes a pressure plate 27. The reflector seat 20 is provided with a limiting groove for placing the reflector prism 23. The pressure plate 27 is fixedly connected to the reflector seat 20 and is used to fix the reflector prism 23 in the limiting groove.
[0022] In this embodiment, the light source module 1 includes a heat sink 10, an LED lamp 11, a microscope tube 12, and a condenser lens assembly 13. The LED lamp 11 is connected to the heat sink 10. The front end of the heat sink 10 is cylindrical and fits into the circular hole of the microscope tube 12. A fixing groove is provided inside the microscope tube 12, and the condenser lens assembly 13 is placed in the fixing groove and glued to the microscope tube 12. The LED lamp 11 is the light-emitting core of the light source module 1. After being powered on, it emits visible light, providing initial illumination for phase contrast / bright field observation of the microscope. The heat sink 10 conducts and dissipates the heat generated by the LED lamp 11, effectively controlling the operating temperature of the LED lamp 11, ensuring that the LED lamp 11 maintains stable light-emitting performance over a long period of time, and avoiding the impact of overheating on the continuity of observation. The fixing groove opened in the microscope tube 12 provides dedicated assembly space for the condenser lens assembly 13, clearly defining the installation position of the condenser lens assembly 13. The light-collecting lens assembly 13 and the lens barrel 12 are fixed by gluing, which can completely eliminate the assembly gap between the light-collecting lens assembly 13 and the lens barrel 12, avoid the positional displacement of the light-collecting lens assembly 13 during the use of the device (such as handling, slight vibration), ensure that the optical axis of the light-collecting lens assembly 13 is always stable, and provide a fixed reference for subsequent light convergence.
[0023] The condenser lens 3 includes a substrate 30, a condenser lens tube 31, and a condenser lens assembly 32. The condenser lens assembly 32 is placed in a circular groove within the condenser lens tube 31 and glued and fixed to it. The condenser lens tube 31 and the substrate 30 are fixed by a threaded connection, and the adjustment module 2 is locked to the substrate 30 by screws. The condenser lens assembly 32 is used to receive the light output from the adjustment module 2 (the ring beam in phase contrast mode and the center beam in bright field mode). Through the refraction of multiple optical lenses within the assembly, the originally divergent or parallel beams are further converged into a focused light spot of appropriate size and uniform intensity. The circular groove on the inner wall of the condenser lens tube 31 provides dedicated assembly space for the condenser lens assembly 32, clearly defining the installation position of the condenser lens assembly 32 and preventing misalignment due to lack of fixed space. The substrate 30 serves as the fixed base for the condenser lens tube 31. It securely fixes the condenser lens tube 31 through a threaded connection, preventing it from tipping over or shifting during use. At the same time, the substrate 30 serves as the connecting carrier for the adjustment module 2. It integrates the adjustment module 2 and the condenser lens 3 onto the same reference plane by tightening screws, ensuring that the relative positions of the light-emitting end of the adjustment module 2 and the light-incident end of the condenser lens 3 are fixed, thus providing structural protection for the continuity of the optical path.
[0024] When the device is in operation, after the device is started, the LED light 11 in the light source module 1 is powered on and emits light, generating initial illumination light. This light first enters the light-collecting lens group 13 in the light source module 1. Through the refraction of multiple lenses in the light-collecting lens group 13, the divergent LED light is converged into a uniform, parallel or nearly parallel beam, providing a stable and concentrated light input for the subsequent light path, ensuring the consistency of subsequent mode switching and lighting effect. The beam of light converged by the light source module 1 is transmitted in a straight line to the reflecting prism 23 of the adjustment module 2. Since the reflecting prism 23 (preferably a right-angle reflecting prism 23) is fixed in the limiting groove of the reflecting mirror seat 20, its reflecting surface is at a preset angle (usually 45°) with the incident beam. It can bend the incident straight beam of light by 90° (or other angles adapted to the overall structure of the equipment) and change the direction of light transmission. This optical path bending design can effectively utilize the space at the rear of the equipment and avoid the problem of excessive equipment height caused by the traditional straight path. At the same time, it ensures that the bent beam of light is accurately aligned with the mating area of the subsequent phase difference ring plate 21 and ring plate switching plate 22, laying the optical path foundation for mode switching. The bent beam continues to be transmitted to the overlapping area of the phase difference ring plate 21 and the ring plate switching plate 22, and is switched according to the usage requirements. The specific switching logic is as follows: Phase contrast mode implementation: When phase contrast observation is required, manually push the ring plate switching plate 22 in the adjustment module 2 to slide to the left along the transverse groove of the reflector mount 20; after sliding into place, the shielding structure of the ring plate switching plate 22 precisely covers the central area of the phase contrast ring plate 21, leaving only the annular area of the phase contrast ring plate 21 to transmit light; at this time, the bent light beam can only pass through the annular area of the phase contrast ring plate 21, forming an annular light beam that meets the requirements of phase contrast observation. This annular light beam can then be combined with the phase plate of the phase contrast objective lens of the microscope to realize phase contrast observation.
[0025] Bright-field mode implementation: When it is necessary to switch to bright-field observation, manually push the ring plate switching plate 22 to slide to the right along the transverse groove of the reflector mount 20; after sliding into place, the shielding structure of the ring plate switching plate 22 precisely covers the annular area of the phase contrast ring plate 21, leaving only the central area of the phase contrast ring plate 21 to transmit light; at this time, the bent beam can only pass through the central area of the phase contrast ring plate 21, forming a central beam that meets the requirements of bright-field observation, which can then be converged by the condenser lens 3 to achieve bright-field observation; After the mode switching (ring beam / center beam) is completed by the adjustment module 2, the beam continues to be transmitted to the condenser lens 3. The condenser lens group 32 in the condenser lens 3 further converges the switched beam into a focused spot through lens refraction, and the size and intensity of the spot are adapted to the microscope observation requirements. Finally, the focused beam output by the condenser lens 3 illuminates the sample on the microscope stage, providing clear and uniform illumination for phase contrast or bright field observation, and meeting the microscope's requirements for observing the fine structure of the sample.
[0026] Additionally, it should be noted that components not described in detail in this article are existing technologies.
[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A phase difference bright field switching device, characterized in that, It includes a light source module (1) for providing and converging light, an adjustment module (2) for switching the light transmission area and bending the light path, and a condenser lens (3) for converging the light output from the adjustment module (2). The adjustment module (2) includes a reflector mount (20), a phase difference ring plate (21) disposed on the reflector mount (20), a ring plate switching plate (22) that can be slidably disposed on the reflector mount (20), and a reflector prism (23) disposed on the reflector mount (20). The phase difference ring plate (21) is fixed in position. The ring plate switching plate (22) can selectively make the annular area or the central area of the phase difference ring plate (21) transparent by sliding laterally, so as to realize the switching between phase difference mode and bright field mode. The reflecting prism (23) is used to bend the light output by the light source module (1) and transmit it to the condenser lens (3).
2. The phase difference bright field switching device according to claim 1, characterized in that, The outer end face of the phase difference ring plate (21) is dovetail groove-shaped. The reflector seat (20) is provided with a circular groove that matches the dovetail groove shape. The phase difference ring plate (21) is assembled with the circular groove. The bottom of the phase difference ring plate (21) is provided with an installation groove. A spring steel wire (24) is placed in the installation groove. After assembly, the spring steel wire (24) is in a bent state and is used to provide an upward restoring force to the phase difference ring plate (21).
3. The phase difference bright field switching device according to claim 2, characterized in that, The top of the reflector mount (20) is provided with at least two adjusting screws (25), which are arranged radially along the circular groove and are used to finely adjust the position of the phase difference ring plate (21) relative to the axis of the circular groove.
4. The phase difference bright field switching device according to claim 1, characterized in that, The adjustment module (2) also includes a ring plate limiting plate (26), which is fixedly connected to the reflector seat (20) to prevent the ring plate switching plate (22) from falling out of the transverse groove of the reflector seat (20).
5. The phase difference bright field switching device according to claim 1, characterized in that, The adjustment module (2) also includes a pressure plate (27). The reflector seat (20) is provided with a limiting groove for placing the reflector prism (23). The pressure plate (27) is fixedly connected to the reflector seat (20) to fix the reflector prism (23) in the limiting groove.
6. The phase difference bright field switching device according to claim 1, characterized in that, The light source module (1) includes a heat sink (10), an LED lamp (11), a lens barrel (12), and a light-collecting lens group (13). The LED lamp (11) is connected to the heat sink (10). The front end of the heat sink (10) is cylindrical and is fitted with the round hole of the lens barrel (12). The lens barrel (12) is provided with a fixing groove. The light-collecting lens group (13) is placed in the fixing groove and glued to the lens barrel (12).
7. The phase difference bright field switching device according to claim 1, characterized in that, The condenser lens (3) includes a substrate (30), a condenser lens tube (31), and a condenser lens assembly (32). The condenser lens assembly (32) is placed in the circular groove of the condenser lens tube (31) and glued and fixed to the condenser lens tube (31). The condenser lens tube (31) and the substrate (30) are fixed by threaded connection. The adjustment module (2) and the substrate (30) are locked together by screws.