Introduction To Optical Lenses

                 Optical lens is a necessary part in machine vision system, which directly affects the quality of image, and affects the realization and effect of the algorithm. The optical lens can be divided into short focal lens, Energizer lens and telephoto lens from focal length; standard, telephoto lens, structure on the fixed light delineated focal lens, manual light delineation focal lens, automatic light delineation focal lens, manual zoom lens, Automatic zoom lens, automatic aperture electric zoom lens, electric three variable (aperture, focal length, focus is variable) lens.Optical Lenses

                 For the camera, the quality of the lens is always the key factor affecting the image, and the digital camera is no exception. Although the CCD resolution of the digital camera is limited, in principle, the optical resolution of the lens is low, but on the other hand, because the digital camera has a smaller imaging area (because the digital camera is imaged on the CCD, and the CCD area is much smaller than the traditional 35 mm camera film), the lens is required to ensure a certain quality of imaging. For example, for a certain subject, the horizontal direction needs 200 pixel to reproduce its detail perfectly, if the imaging width is 10mm, the optical resolution is 20 line/lens to be able to be competent, if the imaging width is 1mm, then requires the lens optical resolution to be in 200 lines/millimeters above. On the other hand, the traditional film is more sensitive to ultraviolet rays, often need to install UV mirror, and the CCD is sensitive to infrared, the lens to increase the special coating or filter will greatly improve the quality of imaging. The lens of the physical aperture is also must be considered, and regardless of its relative caliber, the larger the physical caliber, the greater the luminous flux, digital camera to the light of the reception and control will be better, the better the quality of imaging.Optical Lenses

                Commercial or domestic digital camera lens, some manufacturers use relatively good lenses. The Fuji Camera uses a 170-line/millimeter-resolution professional Fuji-Dragon Lens, a built-in new Fuji-Dragon lens that is clearer than most SLR lenses. Not only the accuracy of the image to ensure the quality of the shot, and the lens error rate reached an astonishing 0.3%, compared to the average digital camera 2/3.Optical Lenses