Introduction And Overview Of Optical Lenses

   Optical lens is an indispensable part of the machine vision system, which directly affects the quality of the image quality and affects the realization and effect of the algorithm. Optical lens from the focal length can be divided into short focus lens, the focus lens, telephoto lens; from the field of view points have wide angle, standard, telephoto lens; structure with a fixed aperture fixed focus lens, manual aperture fixed focus lens, Automatic aperture fixed focus lens, manual zoom lens, auto zoom lens, auto iris electric zoom lens, electric three variable (aperture, focal length, focus are variable) lens and so on.Optical Lenses

    For the camera, the lens has always been a key factor affecting the quality of imaging, digital cameras, of course, no exception. Although the digital camera's CCD resolution is limited, in principle, the optical resolution of the lens requires less; but on the other hand, because the digital camera imaging area is small (because the digital camera is imaging on the CCD, and CCD area Traditional 35 mm camera film is much smaller), and thus requires a lens to ensure a certain imaging quality. For example, for a certain subject, the horizontal direction requires 200 pixels in order to perfectly reproduce the details, if the imaging width of 10mm, the optical resolution of 20 lines / mm lens can be competent, if the imaging width is 1mm, the optical resolution of the lens is required to be above 200 lines / mm. On the other hand, the traditional film is more sensitive to ultraviolet light, external shooting often need to install UV mirror, and CCD is more sensitive to infrared, the lens to add a special coating or filter will greatly improve the image quality. The physical aperture of the lens is also must be considered, and regardless of its relative caliber, the greater the physical aperture, the greater the luminous flux, digital camera on the light acceptance and control will be better, the better the quality of imaging.Optical Lenses

    Commercial grade digital camera and the use of ordinary 35 mm camera with the same general wide-angle lens, because of its deep depth of field, shooting a wide range of advantages, so the choice of digital cameras, the same performance digital camera, can have wide and long distance Digital camera will be better performance.Optical Lenses