How to clean the thermal imaging lens
The following methods can be used to clean the thermal imaging lens: 1. First, gently blow or wipe the thermal imaging lens with a cleaning cloth to remove the dust. 2. Use a lens cleaner that contains 96% alcohol or an ordinary lens cleaner that contains at least 30% alcohol. 3. Soak a cotton ball or lens wipe with cleaning solution. 4. Wipe the lens from the center to the outer edge in a rolling manner, and touch the lens with a clean cloth when cleaning. 5. After cleaning, the cotton balls/lens tissues must be thrown away and cannot be reused. 6. After cleaning, do not dry the lens. Let it dry naturally. At the same time, in order to ensure the normal use of the thermal imaging lens, the lens should be covered in time after use to avoid dust and scratches. Read more exciting novels for free
thermal imaging camera distance
There were different types of thermal imaging cameras, such as short-range thermal imaging cameras and medium-range thermal imaging cameras. Different types of thermal imaging cameras had different observation distances. There were also thermal imaging surveillance cameras with an observation range of 5 to 8 kilometers. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
thermal imaging robot camera
The thermal imaging robotic camera might be a device that integrated thermal imaging technology into the robotic camera. In robot-related fields, such as the inspection robot in the transformer station, it could carry an infrared thermal imaging camera (thermal imaging technology related equipment) to inspect the power equipment, and timely discover the internal thermal defects of the equipment, external mechanical or electrical problems, etc. There was also a thermal imaging temperature measuring robot, which integrated high-precision thermal imaging temperature measuring sensors. It had functions such as face detection, body temperature detection, and multi-person face capture. It could accurately capture the body temperature and face pictures of people. It was suitable for a variety of places that needed fast travel and temperature measurement, such as office areas, hotels, schools, etc. There were also many thermal imagers on the market, and the prices varied. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The imaging principle of the car lens
The basic principle of car lens imaging was the projection of a concave lens. The light passed through the lens (equivalent to a concave lens) to form a virtual image, and then the virtual image was transmitted to the imaging module or displayed on the screen. For the vehicle camera, the light reflected from the surface of the object is incident on the LCD/LCD image sensor through the lens. The image sensor transforms the received optical signal into a digital signal and sends it to the image signal processor. The image signal processor performs image filtering and enhancement on the digital signal, and the processed image information is transmitted to the domain controller through the serializer. Finally, the image image is presented. The car panoramic camera synthesized the images provided by the four 180-degree wide-angle cameras installed on the front, back, and side of the vehicle into a bird 's-eye view of the vehicle, which was displayed on the display screen in the car. The process was to first convert the captured image signal into an electrical signal. After the digital conversion, the processor synthesized the image signal again, and finally formed a simulated bird' s-eye view through the vehicle display screen. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
AI infrared thermal imaging temperature measuring camera
The AI infrared thermal imaging temperature measuring camera was a device that combined multiple technologies. It was composed of an AI dual-eye temperature measuring intelligent camera and AI thermal imaging screening system software. The camera was integrated with a high-precision thermal imaging temperature measuring sensor, as well as built-in face intelligent capture algorithm, ISP image processing and other technologies. It has a variety of functions and is fast. When the detected people pass through the detection area, it can detect the human body temperature within one second and support multiple people.(20 - 30 people) pass through the detection area at the same time and display the temperature values of all the tested people at the same time. It has the characteristic of non-contact remote measurement. The tested person can receive the temperature measurement 1 - 4 meters away from the lens. The tester can operate at a farther console to avoid cross-infection. In terms of accuracy, it has blackbody correction, measurement error accuracy can reach +/-0.3 ° C, face detection, body temperature detection, face capture and other powerful functions. With relevant software, it can accurately capture the body temperature and face pictures of people through the camera's field of view. It is suitable for schools, office buildings, stations and other entrance scenes. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The relationship between lens parameters and imaging
Many parameters of the lens were closely related to the image. ** 1. In terms of resolution ** The resolution restricted the ability of the lens to distinguish the details of the captured scene. The unit was "line pairs/millimeter", and the limiting factor was the phenomenon of light refraction. ** 2. Aperture ** 1. Generally speaking, the size of the aperture affected the amount of light entering. The F value represented the size of the aperture. The smaller the F value, the larger the aperture, and the greater the amount of light entering. For example, in a driving recorder, the aperture size was directly related to the imaging effect at night. When the light was dim, a large aperture (small F value) meant better imaging effect. 2. In the camera lens, different aperture values combined with other camera parameters could meet different shooting needs. For example, a large aperture (small F value) could produce a shallow depth of field effect, making the background blur and highlight the main body. For example, the F1.4 aperture in the SIGMAR fixed-focus lens could give the picture a very good depth of field effect; while a small aperture (large F value) had a large depth of field, which could make the near and far scene relatively clear. ** 3. MTF value (module transfer function)** 1. The MTF value was a comprehensive evaluation of the sharpness, contrast, and resolution of the lens. It was an evaluation of the overall resolution. It was an authoritative and objective technical reference for the quality of the lens. 2. Using Canon's MTF image as an example, the horizontal axis represented the radius of the imaging plane from the center to the edge, and the vertical axis represented the percentage of the imaging quality reaching the physical condition. The black line in the thick line represents the resolution test result at the maximum aperture, the blue line represents the test result at the F8 aperture, the solid line represents the MTF value in the radius, and the dotted line represents the MTF value in the tangency. An MTF value above 0.8 meant that the lens 'performance was in the excellent range, but a lens with an MTF value below 0.6 at the center of the circle was definitely not a good lens. However, it was important to note that MTF charts could not be used to compare lenses with different focal lengths, different frames, fixed focus, and zooming. It was also impossible to compare MTF charts of lenses from different manufacturers under the same focal length because the testing conditions of each manufacturer were different. ** 4. The distance between the two sides of the lens and the inner diameter of the bayonet (affects the compatibility between the lens and the camera and thus indirectly affects the image)** 1. The distance between the two sides was the distance between the bayonet and the plane where the LCD was located. The inner diameter of the bayonet was the diameter of the inner edge of the circular bayonet. The fundamental reason why the lenses of different brands of cameras could not be used in the same way was that the distance between the bayonet and the collar was different. 2. A camera with a short flange-distance could use the lens of a camera with a long flange-distance (the flange-distance could be extended by the transfer ring), but a camera with a long flange-distance could not use the lens of a camera with a short flange-distance. The trend was to use a shorter distance and a larger bayonet diameter, such as Nikon and Canon's new bayonet design. ** 5. Other aspects ** Aspherical lenses and large depth of field were two technical indicators that would also affect the imaging effect of the machine vision lens. In the actual use of the camera, such as the selection of live broadcast equipment, the selection of different lenses (such as the original camera lens and the Vicos fixed-focus lens) would present different imaging texture and depth of field effects. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Fish-eye lens imaging theory
The imaging theory of the fisheye lens was based on its special optical structure design. The fisheye lens had a large spherical curvature, similar to the spherical crystal of a fisheye, and the imaging plane was closer to the lens. The visual effect was similar to a fish observing things on the surface of the water. When the fish was close to the surface of the water, the angle of view could reach a wide angle of nearly 180°. This phenomenon was based on the principle of total reflection and optical reversibility. In terms of structure, the front lens of the fish-eye lens protruded from the front in a parabolic shape in order to maximize the camera angle. It was generally believed that lenses with a focal length of 16mm or shorter were fisheye lenses. However, in engineering, lenses with a viewing angle of more than 140 degrees were collectively referred to as fisheye lenses. In fact, there were also lenses with a viewing angle of more than 270 degrees. In terms of imaging mode, the M12 fisheye lens (180°) generally used vertical or horizontal in-cut imaging mode (mode 1 Circular Fisheye, mode 3 Full Horizontal). At the same time, fisheye lens imaging relied on artificially introducing a large number of barrel distortions to obtain a large field of view, so that it could obtain image information with a large field of view. However, except for the shape of the object in the center of the image, the other parts that should be straight lines had a certain degree of distortion. When matching an image sensor with a fisheye lens, a 1:1 or 4:3 image sensor was generally selected to maximize the use of effective pixelation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to clean the dust on the lens
When there is dust on the lens, you can use the following cleaning methods: 1. Use a blowing brush to remove dust. If it is a zoom lens, extend it to the minimum or maximum focal length so that it can touch the glass. A fine and soft brush (soft mane brush is preferred) is a cheaper alternative to a blow-brush and can also be used to remove dust. You can also use tools like the Knight-Cole Air Blowing Tool to blow out the dust. In addition, you can also use a special blowtorch (such as the ear balls sold in medical equipment stores). The rubber blowtorch has better blowing power. You can hold it in your palm and blow it at the camera. 2. For lenses that have a waterproof seal, do not use a cloth that has been dipped in water. A dry microfiber cloth can remove dust. 3. If there is grease, oil, or dirt on the lens in addition to dust, you can use lens cleaning solution, wet the microfiber cloth with a small amount of cleaning solution, and rub it in a circular motion. The lens wipe was also an excellent substitute for microfiber cloth. It was cheap, disposable, and had a good cleaning ability. 4. Don't use too much force when cleaning the lens, because the lens is a fragile device. If the dirt is difficult to remove, don't forcefully wipe it, be patient. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to clean and maintain the projection lens
Cleaning and maintenance of the projection lens can be carried out as follows: 1. ** Prepare tools ** - ** Lens-wiping paper or cloth **: Choose a soft, lint-free, and lint-free lens wiping paper or cloth. The lens wiping cloth can be washed and used repeatedly. - ** lens cleaner **: Choose a highly volatile cleaner that can deal with oil stains and dirt to prevent secondary pollution to the lens. - ** Blowing a balloon **: Choose a balloon with good elasticity and a large volume to ensure that there is enough strong wind. Also, pay attention to replacing the old balloon in time because it may become dirtier the more you blow it. - ** Cotton-Sticks **: Choose cotton swabs with long and neat fibers. Prepare them in different sizes to deal with different situations. 2. ** Cleaning Steps **: After preparing the tools, clean the lens according to certain steps (the specific steps are not mentioned. You can use the usual operation to blow off the dust on the surface of the lens with a blowing balloon, then gently wipe it with a lens wipe or lens cloth stained with cleaning liquid. For details such as corners, you can use a cotton swab to help clean). It should be noted that the inside of the projector lens is generally not easy to get dust. For example, the quality control of all projector lenses is strict. The lens has been carefully polished and dust-free installation, and the assembly of the whole machine is also tight. Therefore, generally only the outside of the lens needs to be cleaned. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to clean the moldy Pentax lens?
If the Pentax lens becomes moldy, there are the following cleaning methods: 1. Self-dismantling and cleaning: - Prepare tools such as hydrogen dioxide, 95% alcohol (if absolute alcohol is difficult to find, it can be replaced), a screwdriver, lens cleaning paper or cloth, air blowing, etc. When dismantling, pay attention to preserving the screw, be careful of the iron sheet and other parts inside the lens, such as the spring at the bayonet position. It is best to fix it with double-sided tape. There was a triangular-shaped part that was fixed by three screws. It was the bayonet for the camera motor to drive the lens. - After finding the mold, he first washed it with hydrogen dioxide, then used alcohol to absorb water, and finally blew it dry with air. Then, he poured it back according to the original order. You can also use a clean soft brush to gently sweep off the mold on the surface, then spray an appropriate amount of diluted anti-mold and antiseptic agent on the surface. After drying, spray it with alcohol. However, it was difficult to disassemble the lens and it had to be done in a dust-free environment. Otherwise, dust would affect the image. 2. Send to a professional repair shop for cleaning: - Check the lens brand's official website for repair points nearby. Professional repair shops usually clean moldy lenses and replace them with single lenses. They may need to wait for orders. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is the projector imaging reflective imaging, right?
That was not right. A slide projector was an optical magnifying device that used the principle of a concave lens to project pictures on a screen. It was composed of a light source, a condensing lens, a projection lens, and other components. According to the light path structure, it was divided into direct type (used to show transparent slide films) and reflective type (used to show opaque books, pictures, etc.). Its imaging method was mainly direct imaging rather than reflective imaging. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>