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A fast lens selection strategy

by:Fugen      2020-10-16
Industrial camera brand is various, the main classification outside the following kinds: according to the focal length, divided into fixed focus and zoom) the aperture, aperture of fixed and variable aperture: divided interface C interface, CS interface, such as F interface according to the multiple classification: fixed, continuous variable times times the lens of important lens used by machine vision industry mainly includes the FA, industrial camera and microscope, etc. Choice of industrial camera, we must first make sure customer requirements: 1, visual field, optical magnification and the working distance of expectation: when choosing a lens, we will choose is a little bigger than the view object to be tested, for motion control. 2, the depth of field requirement: project to the requirement of depth of field, as far as possible, using a small aperture; When choosing the magnification lens, under the project as far as possible choose low range. If the project is more demanding, high tendency to choose the tip of the depth of field lens. 3, chip size and camera interface: such as two-thirds 'camera support the biggest industrial camera rake face for two-thirds', it is can not support more than 1 inch industrial camera. 4, with the attention and light source, selecting the right lens. 5, can install space: under the condition of scheme can choose, let the customer to change the equipment size is not realistic. Basic parameters of industrial camera field of view ( The Field of view, namely the FOV, also called visual Field) : refers to the visual range of observation object, which is full of camera collection object is part of the chip. ( Must want to know about the field range is selection of) Working distance ( 工作距离,即WD) : refers to the distance from the lens anterior to the test object. The surface of the clear imaging distance ( Selection must understand the question, whether the working distance is adjustable? Include whether the installation space, etc. ) Resolution: the image system can detect the minimum on the test object can distinguish feature sizes. In most cases, the view is smaller, the better resolution. The depth of field ( The Depth of the view that DOF) : the object is to best focus is near or far, camera's ability to maintain the required resolution ( Need to know the customer have special requirements for depth of field? )
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