Within this distance, various kinds of optical components necessary such as beam splitters or optical filters call be added, and at the same time, this kind of design has better imaging results. Another type is infinite optical structural design, in which the light between the tube lens after passing the objective lens becomes "parallel light". The finite structure is an integrated design, with a compact structure, and it is a kind of economical microscope. One type is finite optical structural design, in which light passing through the objective lens is directed at the intermediate image plane (located in the front focal plane of the eyepiece) and converges at that point. Infinite Close Λ Microscopes and components have two types of optical path design structures. Therefore, video zoom lens combination is flexible, compact, with strong adaptability and low cost, suitable for use in industry, especially extensively used in the electronics industry. Regarding accessories of video zoom lens such as the stands and light source etc., generally, all accessories of stereo microscope can be used. At the same time, video zoom lens can also be designed as parallel light so as to add even more configuration accessories, such as observation eyepieces, aperture diaphragms, coaxial illumination light sources, reticles, and nosepieces that can change the viewing angle and direction, etc. Video zoom lens can have relatively more objective lens and photographic eyepiece multiples for selection. Most of the video continuous zoom lens is to observe the electronic image, not through the eyepiece, but through the camera. Compared with other compound microscopes such as biological metallurgical microscopes, the total optical magnification of video zoom lens is generally below 40X, which is the coverage of low magnification range that these microscopes do not have. In fact, it lacks the most important "stereoscopic" imaging features. It has been observed that as most of the parametric features are close to stereo microscopes, video zoom lens is then classified as stereo microscope. The magnification and multiple range of video zoom lens are usually the same as those of a stereo microscope, but because the objective lens is one, its optical imaging is flat, not stereoscopic. It can be considered as a set of dual optical path stereo microscopes. Video Zoom Lens Close Λ Video zoom lens, refers to microscope that has only one set of imaging optical paths.
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