Industrial lens is an indispensable part of mechanical vision system. According to focal length, it can be divided into short-focus lens, medium-focus lens, telescope head, and according to field of view, it can be roughly divided into wide-angle, standard, and telephoto lenses. The structure is divided into fixed aperture fixed focus lens, manual aperture fixed focus lens, automatic aperture fixed focus lens, manual aperture fixed focus lens, automatic zoom lens, automatic zoom lens, automatic aperture electric zoom lens, electric triple zoom lens and so on.
The specific classifications of industrial lenses are as follows:
According to the type of industrial lens interface
There are many different types of interfaces between industrial lenses and industrial cameras. Industrial cameras commonly include C interface, CS interface, F interface, V interface, T2 interface, Leica interface, M42 interface, M50 interface, etc. The different interface types are not directly related to the performance and quality of industrial lenses, but the interface methods are different. Generally, the conversion interface between various commonly used interfaces can also be found.
The C interface and the CS interface are the most common international standard interfaces for industrial cameras, they are 1 inch-32UN inch threaded connections. The thread connection of the C type interface and the CS type interface is the same. The difference is that the back intercept of the C type interface is 17.5mm, the back intercept of the CS type interface is 12.5mm. Therefore, the industrial camera with CS interface can be connected to the lens of C port and CS port, but when using the lens of C port, need add a 5mm ring ; the industrial camera with C port cannot use the lens of CS port.
The F-mount lens is a Nikon lens interface standard, so it is also known as the Nikon port. It is also a type commonly used in industrial industrial cameras. The F-lens is required when the target surface of a general industrial camera is greater than 1 inch.
The V mount lens is the standard used by the famous professional lens brand Schneider lens. It is also generally used for industrial cameras with large target surfaces or special-purpose lenses.
Industrial lenses are classified according to focal length:
According to whether the focal length can be adjusted, it can be divided into two categories: fixed focal length industrial lens and zoom focal length industrial lens. Fixed focal length industrial lenses can be divided into four categories: fisheye lens, short focal lens, standard lens and telephoto lens. The zoom lens can be divided into manual zoom electric zoom.
Industrial lenses are classified according to the size of the effective image field:
Can be divided into TV camera lens; movie camera lens, camera lens. The TV camera lens is divided into 1/4 inch, 1/3 inch, 1/2 inch, 2/3 inch, 1 inch, etc.
Other special-purpose lenses:
Telecentric lens, mainly designed to correct the parallax of traditional lens, It can be within a certain range of object distance, so that the magnification of the obtained image will not change with the change of object distance. This is a very important application when the measured object is not on the same surface.
Microscope (Micro), generally refers to the imaging system with an imaging ratio greater than 10: 1, but because the pixel size of current industrial cameras has been within 3 microns, so the general imaging ratio is greater than 2: 1 .
Macro lens (Macro) generally refers to a specially designed lens with an imaging ratio of 2: 1 to 1: 4. When the image quality requirement is not very high, the method of adding a close-up ring between the lens and the industrial camera or the method of adding a close-up lens in front of the lens can achieve the effect of enlarged imaging