Industrial visual inspection differential interference device

Abstract

The utility model discloses an industrial visual inspection differential interference device, which belongs to the technical field of industrial visual inspection differential interference, and comprises a camera connected with a mirror tube, and a DIC prism is arranged below the mirror tube; the objective lens connecting plate is arranged at the side part of the DIC prism slot connecting plate, and an objective lens is arranged at the bottom of the objective lens connecting plate; and the manual adjustment sliding table is arranged on the objective lens connecting plate and is used for adjusting the clear position of the objective lens. Applying to differential interference detection; according to the utility model, the precise manual adjustment sliding table is used, so that the coherent plane of the DIC prism can be coincided with the back focus of the objective lens, clear imaging under the high-precision condition is achieved, and meanwhile, the stability can be ensured.

Description

Technical Field

[0001] The utility model relates to an industrial vision detection differential interference device, belonging to the technical field of industrial vision detection differential interference. Background Art

[0002] When differential interference detection is used in a microscope system, the coherence plane of the DIC prism must coincide with the rear focal plane of the objective lens in order to obtain a clear image. Due to installation errors and the different distances between the rear focal planes of different objectives and the coherence plane, a tool that can adjust the rear focus of the objective lens is urgently needed so that clear images can be obtained when using objectives of different magnifications. Utility Model Content

[0003] The utility model aims to provide an industrial visual inspection differential interference device, in which a hand-adjustable slide is used to adjust the focus overlap between an objective lens and a DIC prism, so as to solve the problem of objective lens installation error and unclear imaging when using different objective lenses proposed in the above background.

[0004] An industrial visual inspection differential interference device, comprising:

[0005] A camera is connected to a mirror tube, and a DIC prism is installed below the mirror tube;

[0006] An objective lens connecting plate is arranged on the side of the DIC prism, and an objective lens is arranged at the bottom of the objective lens connecting plate;

[0007] The manually adjustable slide is arranged on the objective lens connecting plate and is used to adjust the clear position of the objective lens.

[0008] Optionally, the objective lens is located directly below the DIC prism.

[0009] Optionally, a DIC prism slot connecting plate is provided at the beam splitter seat below the mirror tube, and the DIC prism is installed at a slot position of the DIC prism slot connecting plate.

[0010] Optionally, the manually-adjustable slide includes an adjusting knob, a slide fixing plate and a slide moving plate, the adjusting knob is arranged on the top of the slide moving plate through a bracket, the bottom of the adjusting knob is connected to a ejection rod, the slide moving plate is connected to the objective lens connecting plate, the slide fixing plate is connected to the DIC prism slot connecting plate, the slide fixing plate and the slide moving plate are slidably connected by a ball guide rail, and the adjusting knob is used to enable the objective lens to observe a clear position of the camera to capture pictures.

[0011] Optionally, the manual slide is further provided with a locking screw for locking the position of the objective lens when the objective lens observes the image and reaches a clear position.

[0012] Optionally, the device further comprises:

[0013] The light source device is used to provide light source for the device.

[0014] Optionally, it also includes a polarizer, which is arranged below the light source device and is used to convert the light source into polarized light with a single polarization direction;

[0015] Optionally, it also includes a polarizer, which is arranged just above the DIC prism and is used to cooperate with the polarizer to control the polarization direction of the transmitted light and is perpendicular to the polarizer.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The beneficial effect of the utility model is that the utility model uses a precise hand-adjustable slide table, which can make the coherent plane of the DIC prism coincide with the back focus of the objective lens, thereby achieving clear imaging under high-precision conditions and ensuring stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of an industrial visual inspection differential interference device of the utility model;

[0019] Figure 2 This is a schematic diagram of an industrial visual inspection differential interference device of the utility model;

[0020] Figure 3 This is an exploded view of the manual slide of the utility model;

[0021] Figure 4 This is a schematic diagram of the sliding table moving plate of the utility model;

[0022] Figure 5 This is a side view of the manual slide of the utility model;

[0023] Figure 6 This is a view of the cross ball guide rail of the utility model;

[0024] In the figure: 1. camera; 2. lens tube; 3. light source device; 4. analyzer; 5. polarizer; 6. DIC prism slot connecting plate; 601. threaded hole; 7. DIC prism; 8. manual slide; 801. locking screw; 802. adjustment knob; 803. threaded hole; 804. countersunk screw hole; 805. slide moving plate; 806. slide fixing plate; 807. ejector rod; 9. objective lens connecting plate; 901. countersunk screw hole; 10. objective lens. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] like Figure 1-Figure 2 As shown, an industrial visual inspection differential interference device is disclosed, comprising:

[0028] A camera 1 is connected to a lens tube 2, and a DIC prism 6 is installed below the lens tube;

[0029] An objective lens connecting plate 9 is arranged on the side of the DIC prism, and an objective lens 10 is arranged at the bottom of the objective lens connecting plate;

[0030] A manually adjustable slide 8 is provided on the objective lens connecting plate 9 and is used to adjust the clear position of the objective lens 10;

[0031] The light source device 3 is used to provide light source for the device.

[0032] The polarizer 5 is arranged below the light source device and is used to convert the light source into polarized light with a single polarization direction;

[0033] The analyzer 4 is arranged just above the DIC prism and is used to cooperate with the polarizer to control the polarization direction of the transmitted light.

[0034] In this embodiment, the objective lens is located directly below the DIC prism. Specifically, a DIC prism slot connecting plate 6 is provided at the beam splitter seat below the lens tube 2 , and the DIC prism 7 is installed at a slot position of the DIC prism slot connecting plate 7 .

[0035] The main function of the polarizer 5 is to convert unpolarized light (i.e. natural light, which contains light waves with all possible polarization directions) into polarized light with a single polarization direction. It selectively allows light waves with a specific vibration direction to pass through while blocking light waves with other directions, so that the light beam passing through the polarizer becomes linearly polarized light with a well-defined polarization direction.

[0036] The polarizer 5 and analyzer 4 together form the core polarization system of the polarizing microscope. The polarized light generated by the polarizer may change its polarization state after passing through the sample. The analyzer is used to detect these changes and control the intensity of the transmitted light by adjusting its own angle, thereby presenting the birefringence characteristics of the sample in the eyepiece. In the orthogonal polarization mode, the polarization axes of the polarizer and analyzer are at a 90° angle, and the light not affected by birefringence will be completely blocked, while the birefringent sample will present a bright image against a dark background.

[0037] The main task of the analyzer 4 is to detect and distinguish the polarization state of the incident light. When a beam of light passes through the analyzer, the analyzer can identify whether the light is polarized light, and if it is polarized light, it can further determine its polarization direction. This is crucial for studying birefringent samples using polarizing microscopy, because birefringent samples will change the polarization state of the incident polarized light.

[0038] The analyzer 4 can usually rotate freely so as to adjust the direction of its transmission axis relative to the incident polarized light. By rotating the analyzer, the polarization direction of the transmitted light can be precisely controlled, thereby affecting the angle between the polarized light after passing through the sample and the transmission axis of the analyzer. In a polarizing microscope, the analyzer 4 needs to be orthogonal to the polarizer 5 (that is, the polarization axes of the two are perpendicular to each other), forming the so-called "orthogonal analyzer position". In this state, the incident polarized light that has not been changed by the birefringent sample will be completely blocked after passing through the analyzer, making the field of view appear dark. When a sample is placed in between and has a birefringent property, it will decompose the incident light into two polarization components with mutually perpendicular vibration directions, one of which can pass through the analyzer, thereby producing a clear contrast on the dark background, making it easy to observe the birefringence phenomenon and structural details of the sample.

[0039] In this embodiment, the manual slide 8 is provided with an adjustment knob 802, and the knob 802 is adjusted so that the objective lens can observe a clear position of the camera to capture the picture, as follows:

[0040] The objective lens 10 is connected to the objective lens connecting plate 9 by threads, and a countersunk screw hole 901 is provided on the objective lens connecting plate 9, and a threaded hole 803 is provided on the manual adjustment slide 8. The hexagon socket screw 11 passes through the countersunk screw hole 901 and is screwed onto the threaded hole 803 to be connected together; a countersunk screw hole 804 is provided on the back side 8 of the manual adjustment slide, and a threaded hole 601 is provided on the DIC prism slot connecting plate 6. The hexagon socket screw 11 passes through the countersunk screw hole 804 and is screwed onto the threaded hole 601 to be connected together; when the knob 802 on the slide 8 is adjusted, the ejector rod 807 is driven to move forward or backward; the ejector rod 807 contacts the slide fixed plate 806, and the slide movable plate 805 is connected and matched by the cross ball guide rail 808; the ejector rod 807 moves forward or backward, which drives the slide movable plate 805 to move forward or backward, thereby achieving the effect of adjusting the back focus of the objective lens.

[0041] In this embodiment, in order to keep the slide moving plate 805 from being displaced due to external forces after being adjusted in place, the manual slide may be equipped with a locking mechanism. Specifically, the manual slide is also provided with a locking screw 801, which is used to lock the position of the manual slide when the objective lens observes the image acquisition to a clear position. In addition to the locking screw, such as a ratchet, a butterfly nut, a brake device or a thread pair with a self-locking property (such as a self-locking screw). These devices allow the user to lock the position of the slider after the adjustment is completed, and further lock the position of the objective lens to ensure observation stability.

[0042] In order to achieve fine positioning and repeatable adjustment, the manual slide may be equipped with a fine-adjustment scale, pointer or digital display device to help the operator quantify the movement distance of the slide.

[0043] Reference Figure 1-2 During measurement, the objective lens 10 is mounted on the objective lens connecting plate 9, the objective lens connecting plate 9 is fixed on the manual slide 8, and the objective lens 10 is mounted at the objective lens interface of the connecting plate 9 (as shown in the figure); use the manual slide 8 to adjust to the clear imaging position, stop adjusting the adjustment knob of the manual slide 8, tighten the screw 801, the position can be fixed, and the microscope imaging is fixed at a clear position.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An industrial visual inspection differential interference device, characterized in that: include: A camera is connected to a mirror tube, and a DIC prism is installed below the mirror tube; An objective lens connecting plate is arranged on the side of the DIC prism, and an objective lens is arranged at the bottom of the objective lens connecting plate; The manually adjustable slide is arranged on the objective lens connecting plate and is used to adjust the clear position of the objective lens.

2. The industrial visual inspection differential interference device according to claim 1, characterized in that: The objective lens is located directly below the DIC prism.

3. The industrial visual inspection differential interference device according to claim 1, characterized in that: A DIC prism slot connecting plate is provided on the beam splitter seat below the mirror tube, and the DIC prism is installed at a slot position of the DIC prism slot connecting plate.

4. The industrial visual inspection differential interference device according to claim 3 is characterized in that: The manual slide comprises an adjusting knob, a slide fixing plate and a slide moving plate. The adjusting knob is arranged on the top of the slide moving plate through a bracket. The bottom of the adjusting knob is connected with an ejection rod. The slide moving plate is connected with an objective lens connecting plate. The slide fixing plate is connected with a DIC prism slot connecting plate. The slide fixing plate and the slide moving plate are slidably connected by a ball guide rail. The adjusting knob is used to enable the objective lens to observe a clear position of a camera to capture a picture.

5. The industrial visual inspection differential interference device according to claim 4, characterized in that: The manual slide is also provided with a locking screw for locking the position of the objective lens when the objective lens observes the image and reaches a clear position.

6. The industrial visual inspection differential interference device according to claim 1, characterized in that: Also includes: The light source device is used to provide light source for the device.

7. The industrial visual inspection differential interference device according to claim 6, characterized in that: It also includes a polarizer, which is arranged below the light source device and is used to convert the light source into polarized light with a single polarization direction.

8. The industrial visual inspection differential interference device according to claim 7, characterized in that: It also includes a polarizer, which is arranged just above the DIC prism and is used to cooperate with the polarizer to control the polarization direction of the transmitted light and is perpendicular to the polarizer.

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