Germanium blank lens defect detection device based on infrared thermal imaging
Through the detection device based on infrared thermal imaging, the problem of internal defect detection of germanium blank lenses is solved, and early identification of defective lenses is achieved, product quality and yield rate are improved, and later quality problems are avoided.
Patent Information
- Application Number
- CN202421747074.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The prior art cannot effectively detect internal defects of germanium blank lenses, causing the client to discover defective products, affecting product yield and production costs.
Using infrared thermal imaging-based detection devices, including a constant temperature heat source, an infrared thermal imaging camera, a focus lens and a fixture unit, the fine defects inside the germanium blank lens are amplified and displayed through infrared thermal imaging technology.
It realizes early identification of internal defects of germanium blank lenses, avoids defective lenses delivered to customers, improves the quality of factory products, and reduces the risk of later quality disputes.
Smart Images
Figure CN223154914U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of germanium blank lens detection, and particularly to a defect detection device for germanium blank lenses based on infrared thermal imaging. Background Technique
[0002] Germanium blank lenses are mainly used in the field of infrared optics for manufacturing infrared transmission windows, infrared lenses, night vision devices, infrared thermometers, etc. Since downstream germanium products have extremely high precision requirements, the processing belongs to highly refined operations, with high processing costs and large added values, it is extremely important to control the process parameters of each process. Among them, the internal mechanical defects of germanium blank lenses are very important quantitative parameters. External defects such as chipping and scratches can be detected by the naked eye, but internal defects such as small cracks cannot be detected before leaving the factory and can only be discovered when the customer assembles the lens and tests the lens. At this time, defective products have already been formed, which is very important for improving the finished product rate of customer products and reducing production costs.
[0003] The existing technology can only judge whether there are physical defects by magnifying the external surface structure of the blank lens, and lacks effective means for internal physical flaw detection of the blank lens. The internal physical defects can only be detected when verifying the quality of the lens product at the customer side. Utility Model Content
[0004] To solve or partially solve the problems existing in the related technologies, this application provides a defect detection device for germanium blank lenses based on infrared thermal imaging, which uses thermal imaging technology to detect internal hidden damages of the blank lens and promptly eliminate defective lenses.
[0005] The first aspect of this application provides a defect detection device for germanium blank lenses based on infrared thermal imaging, including:
[0006] A constant temperature heat source for providing a stable radiation source for the detection of germanium blank lenses.
[0007] An infrared thermal imaging structure, including an infrared thermal imaging camera and a focusing lens. The infrared thermal imaging camera is correspondingly installed with the focusing lens, which is set facing the constant temperature heat source and is used to provide a real-time lens thermal image of the germanium blank lens.
[0008] A fixture unit, including a fixed seat, a clamping rod, and a clamping block. The fixed seat has a "C-shaped" structure. An installation hole is opened at the top of the open end of the fixed seat. The clamping rod passes through the installation hole and is threadedly connected to the fixed seat. A clamping block is provided at the bottom end of the clamping rod. The clamping block and the bottom of the open end of the fixed seat form a limiting structure for fixing the germanium blank lens.
[0009] A display unit for displaying the real-time lens thermal image.
[0010] Further, the infrared thermal imaging structure further includes a moving bracket, which is used to adjust the position of the infrared thermal imaging camera and fixedly install it.
[0011] Further, a rotating rod is connected to the top of the clamping rod, and the rotation of the rotating rod drives the clamping rod to move up and down.
[0012] Further, a placement platform is formed at the bottom of the open end, and an elastic protective layer is laid on the placement platform.
[0013] Further, the clamping block is of a hemispherical structure, and an elastic protective layer is laid at the bottom of the clamping block.
[0014] The technical solution provided by this application may include the following beneficial effects:
[0015] This application provides a defect detection device for germanium blank lenses based on infrared thermal imaging. With the help of thermal imaging technology, the internal subtle defects of germanium blank lenses are magnified and displayed through optical and electronic technologies, so as to identify defective blank lenses and avoid delivering defective blank lenses to customers. The device improves the physical flaw detection effect of blank lenses, thereby improving the quality level of factory products and avoiding later quality disputes.
[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] By describing the exemplary embodiments of this application in more detail in conjunction with the drawings, the above and other objects, features, and advantages of this application will become more obvious. Among them, in the exemplary embodiments of this application, the same reference numerals generally represent the same components.
[0018] Figure 1 is a schematic structural diagram of the device shown in the embodiments of this application;
[0019] REFERENCE SIGNS
[0020] In the figure, 1 - surface type black body, 2 - fixed seat, 3 - clamping rod, 4 - clamping block, 5 - rotating rod, 6 - germanium blank lens, 7 - infrared thermal imaging camera, 8 - display. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The embodiments of this application will be described in more detail below with reference to the drawings. Although the embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.
[0022] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, the meaning of "a plurality" is two or more, unless otherwise specifically and clearly defined.
[0023] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application 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 thus should not be construed as a limitation to this application.
[0024] Unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0025] The technical solutions of the embodiments of this application will be described in detail below with reference to the drawings.
[0026] As Figure 1 shown, the germanium blank lens defect detection device based on infrared thermal imaging includes: a constant temperature heat source, an infrared thermal imaging structure, a fixture unit, and a display unit. The constant temperature heat source is a planar blackbody 1, which provides a stable radiation source for the detection of germanium blank lenses.
[0027] The infrared thermal imaging structure includes an infrared thermal imaging camera 7, a focusing lens, and a moving bracket. A small field of view and high-resolution infrared thermal imaging camera 7 is adopted, and a focusing lens is installed in a supporting manner. The moving bracket can move up, down, left, and right to adjust the position of the infrared thermal imaging camera 7 and fixedly install the camera. The infrared thermal imaging camera 7 is arranged facing the constant temperature heat source, and is used to capture the real-time lens thermal image of the germanium blank lens 6.
[0028] The fixture unit is arranged between the surface black body 1 and the infrared thermal imaging camera 7 and is used to limit and fix the germanium blank lens 6. The fixture unit includes a fixed seat 2, a clamping rod 3, a clamping block 4, and a rotating rod 5. The fixed seat 2 is of a "C-shaped" structure. An installation hole is provided at the top of the open end of the fixed seat 2, and a placement platform is formed at the bottom of the open end. An elastic protective layer is laid on the placement platform. A connecting internal thread is provided in the installation hole, and a connecting external thread is provided on the clamping rod 3. The clamping rod 3 passes through the installation hole and is threadedly connected to the fixed seat 2. A rotating rod 5 is connected to the top of the clamping rod 3. During use, rotating the rotating rod 5 drives the clamping rod 3 to move up and down. A clamping block 4 is provided at the bottom end of the clamping rod 3. The clamping block 4 is of a hemispherical structure. The clamping block 4 and the bottom of the open end of the fixed seat 2 form a limiting structure for fixing the germanium blank. To prevent damage to the germanium blank lens 6, elastic protective layers are laid at the bottom of the clamping block 4 and the bottom of the open end of the fixed seat 2. The elastic protective layer can use elastic silica gel.
[0029] The display unit, which is used to display the real-time lens thermal image, consists of a monitor 8 and its connecting lines, and is used to display the real-time thermal image of the blank lens provided by the thermal imaging camera. The inspector judges whether there are internal physical defects in this blank lens by observing the details of the thermal image.
[0030] The device is also provided with a base, which is used to fixedly place the surface black body 1, the support of the infrared thermal imaging camera 7, the fixture support part, and fixedly place the monitor 8, and provide a line path for power supply and communication of the device.
[0031] The surface black body 1 faces the infrared thermal imaging camera 7. The thermal imaging camera focuses the focal length on the clamping position of the fixture through the focusing lens, which is convenient for displaying a clear thermal imaging picture on the display unit. Different lenses and focal lengths can enable comprehensive and detailed detection of germanium blank lenses 6 with different diameters. The inspector places the germanium blank lens 6 to be detected at the bottom of the open end of the fixed seat 2, and rotates the rotating rod 5 to move the clamping block 4 downward until the lens is limited and fixed on the fixture. The flexible fixture can protect the germanium blank lens 6 from being damaged during detection.
[0032] From the display unit, observe the thermal image of the germanium blank lens 6. If irregular shadow lines appear in the image and are not the lens contour, it can be determined that there are internal physical defects, and this germanium blank lens 6 needs to be returned to the previous process to reform a single crystal and then processed into a blank lens.
[0033] Finally, it should also be noted that in this text, relationships 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 "including", "comprising" or any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.
[0034] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0035] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.
Claims
1. A defect detection device for germanium blank lenses based on infrared thermal imaging, characterized in that, Comprising: A constant temperature heat source for providing a stable radiation source for the detection of germanium blank lenses. An infrared thermal imaging structure, including an infrared thermal imaging camera and a focusing lens. The infrared thermal imaging camera is correspondingly installed with the focusing lens and faces the constant temperature heat source device, and is used to provide a real-time lens thermal image of the germanium blank lens. A fixture unit, including a fixed seat, a clamping rod, and a clamping block. The fixed seat is of a "C-shaped" structure. An installation hole is opened at the top of the open end of the fixed seat. The clamping rod passes through the installation hole and is threadedly connected to the fixed seat. The clamping block is provided at the bottom end of the clamping rod. The clamping block and the bottom of the open end of the fixed seat form a limiting structure for fixing the germanium blank lens. A display unit for displaying the real-time lens thermal image.
2. The germanium blank lens defect detection device according to claim 1, wherein, The infrared thermal imaging structure further includes a moving bracket, which is used to adjust the position of the infrared thermal imaging camera and fixedly install it.
3. The germanium blank lens defect detection device according to claim 1, characterized in that, A rotating rod is connected to the top of the clamping rod, and the rotation of the rotating rod drives the clamping rod to move up and down.
4. The germanium blank lens defect detection device according to claim 1, characterized in that, A placement platform is formed at the bottom of the open end, and an elastic protective layer is laid on the placement platform.
5. The germanium blank lens defect detection device according to claim 1, characterized in that, The clamping block is of a hemispherical structure, and an elastic protective layer is laid at the bottom of the clamping block.