The optical lens should be very familiar to people in the machine vision industry because the lens is an essential part of the machine vision detection system. We should also understand the principle of the lens. There may be some observed image deformities in some of our optical lenses. Now there is some related knowledge for you.
In machine vision system, optical lens is equivalent to human eyes. The application of optical lens is to focus the optical image of the target on the photosensitive array of image sensor (camera).
All the image information processed by the vision system is obtained through the lens, and the quality of the optical lens directly affects the overall performance of the vision system. Once the information is seriously lost in the imaging system, it is very difficult to try to recover in the later link.
There are many kinds of optical lenses. Welcome to pick up your needs in ECOPTIK, which is a professional optical products manufacturer.
(1) In terms of focal length, it can be divided into short focal length, medium focal length, long focal length and zoom lens;
(2) According to the size of the field of view, it can be divided into wide-angle, standard and telephoto lenses;
(3) Structurally classified, it can also be divided into fixed aperture fixed focus lens, manual aperture fixed focus lens, automatic aperture fixed focus lens, manual zoom lens, automatic aperture electric zoom lens, electric three variable lens (aperture, focal length and focus) an so on.
According to your needs, you also can custom optical lenses in ECOPTIK.
Optical lens imaging will be more or less distorted. Larger distortion will cause great trouble to the vision system. Detailed consideration should be given to this during imaging design, including the selection of a lens with a small distortion, and the effective field of view is only the central field of view with a small distortion.
Another characteristic of an optical lens is its spectral characteristic, which is mainly affected by the interference characteristic of the lens coating and the absorption characteristic of the material. It is required that the highest resolution light of the lens should match the bright wavelength and the wavelength of the CCD device, and the light transmittance of the optical lens of this wavelength should be increased as much as possible.
Some special effects can be achieved by selecting appropriate filters in the imaging system. In addition, the design of imaging optical path also needs to pay attention to the influence of various stray light.
The optical lens is also an essential component in TV monitoring. The lens combined with the CCD industrial camera, can image the long-distance target on the CCD target surface of the industrial camera, and then convert the optical image formed by the optical imaging system into video/digital signal.