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![[basic] optical lens basic knowledge introduction](/npublic/img/s.png "[basic] optical lens basic knowledge introduction")
[basic] optical lens basic knowledge introduction
The optical lens is an essential part of the machine vision system, which directly affects the quality of the image and the implementation and effect of the algorithm. In addition, the only way for the industry to flourish is to choose the right lens and reduce the cost of the machine vision system. Optical lens specifications range, sometimes unavoidably dizzy. Optical lens can be divided into short focus lens, medium focus lens and long focus lens from focal length. From the field of view, there are wide-angle, standard and telephoto lenses. The structure includes fixed aperture fixed focus lens, manual aperture fixed focus lens, automatic aperture fixed focus lens, manual zoom lens, automatic zoom lens, automatic aperture electric zoom lens, electric three-variable (aperture, focal length and focus can be changed) lens, etc. According to the experience we use, optical lenses in Russia are cheap.
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Components of a typical optical lens
An optical lens is a basic unit of an optical lens, and is an optical part formed by two curved surfaces surrounding a transparent medium (such as glass, acrylic, etc.). The shape of the curved surface is usually spherical and aspherical, in which light is mainly refracted. In the actual processing and inspection, the production of spherical lenses is more convenient and simple, and most lenses are spherical (the plane can be regarded as a spherical surface with an infinite radius of curvature).
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2024
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Laser optical element [industrial lens]]
CCTV(Closed Circuit Television) lens, that is, closed-circuit television lens, which is designed for the application of video surveillance, this kind of lens is suitable for long-distance imaging, also known as infinite conjugate lens. In general, this type of lens will have a shortest working distance, less than the distance can not be clearly focused.
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2024
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What are the components of a surveillance camera?
Usually a network camera tail cable interface, the other is the power cord. If it's a POE camera, it's a network cable interface. Why are the prices of different brands of cameras the same as pixels but vary a lot? The main reason is the difference in the quality of materials used in these accessories. People with strong hands-on ability can assemble one by themselves to try the effect.
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2024
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