CCD, English full name: Charge-coupled Device, Chinese full name: charge-coupled device. It can be called CCD image sensor. CCD is a semiconductor device that can convert optical images into digital signals. CCD has high sensitivity, strong stability, small size, long life, and has good photosensitivity and imaging capabilities. Therefore, it provides good basic conditions for machine vision systems to collect, transmit, and process images. With the wide application of machine vision in various industries, CCD has also been selected by more and more industries. Scientific CCD is an imaging device specially used in the field of scientific research. So, in the face of a wide variety of scientific grade CCD products, how to find a suitable scientific grade CCD according to our actual needs in microscope applications?
The role of scientific grade CCD in the application of microscopes is mainly to take clear and accurate images of the images observed under the microscope, and at the same time to quickly output the images to image processing software through transmission to ensure that the images can be used for analysis and detection. Whether the image can be obtained clearly and accurately is crucial to the entire process, and it is the scientific grade CCD that determines all this. At the same time, the factors that determine whether the CCD meets the requirements of the microscope application include clarity, illuminance, distortion, etc. Below, a few factors are selected for a simple analysis.
â— Clarity. As long as image acquisition is involved, clarity is one of the factors that must be considered. To determine whether a scientific-grade CCD can meet the application of a microscope, it is necessary to use a special test card for measurement while keeping the lens unchanged. The measurement content includes the vertical and horizontal resolution of the CCD. In the process of testing, focus on distant objects can be carried out, or CCD can be analyzed by focusing while testing.
â— Sensitivity. Sensitivity is an important characteristic of CCD, and also a key factor in determining whether a clear image can be obtained in the background. Observe an object from a long distance, observe whether there is color distortion, and compare with other objects with bright colors, you can quickly judge the sensitivity of the scientific CCD. In addition to the long-distance observation, a close-up test is also required. For example, you can take a color picture book in front of the CCD and observe the sharpness and color distortion of the picture outline.
â— Illumination. In general, environmental factors are also important in microscope applications, so illuminance is also a point for testing scientific-grade CCDs. What we often use is to place the CCD in the dark room, and place 220V incandescent lamps in the front and back of the dark room. By adjusting the indoor lighting, observe the illuminance value of the CCD to judge whether it meets the microscopic needs.
â— Distortion. Here mainly refers to the detection of whether the scientific-grade CCD will have spherical distortion. Place the test card with the sphere on the front of the CCD so that the entire sphere can appear completely on the screen to see whether the circle is elliptical. Then move the CCD forward to see if the center of the circle is enlarged. Pull the CCD away to see if there is any arc distortion on the sides, corners, and frames.
The above are just a few conventional judgment methods. In actual operation, there may be more constraints. The effect of imported scientific research-grade CCD is certainly very good. The price is there. Although Lunlun started relatively late in this field relative to foreign manufacturers However, in recent years, the development trend of Allen is very good. Adhering to independent research and development, technological innovation, all aspects have gradually approached the international advanced level. First-class quality, affordable prices, and perfect after-sales have made Allen in the domestic research-grade CCD. Gained a good reputation. In 2013, Ann Lun launched a new 2.8 million scientific and research-grade black and white semiconductor cooling CCD. The cold CCD camera uses Sony's top ICX674AL chip, especially designed for low-light imaging users. Semiconductor cooling technology and multiple noise reduction technologies . Semiconductor refrigeration technology can greatly reduce the noise of taking pictures for a long time. At the same time, the unique anti-glow technology reduces the chip's glow during long-time exposure, and makes the image achieve a good linear effect. In addition, in terms of software, we have built a number of user-friendly settings for low-light shooting, such as hardware integration and irregular integration, which makes the user's interface more user-friendly in testing and manipulation. For instrument development vendors, SDKs are provided to assist users in development, and we can change our control interface as needed, saving development time for end users and facilitating product integration. Please click teelen.com for more information.
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