Integral double-lens focusing device

Abstract

The invention provides an integral double-lens focusing device. A lens adjustment frame is fixed on a lens adjustment base; a pair of internal sliding core and external sliding core which is in two-dimensional sliding fit with each other are arranged inside the lens adjustment frame; the diameter position of the internal sliding core is riveted with two dump bolts serving as guide supports; a large lens adjustment internal cylinder and a small lens adjustment internal cylinder which are used for assembling and fixing lenses are arranged in the corresponding internal sliding core; the two lensadjustment cylinders are in sliding fit with each other; and a pair of sliding sleeves inside which compression springs are arranged are arranged inside the two adjacent sides of the lens adjustment frame respectively, and a high-precision knob fine tuning mechanism is arranged in the middle of the other two adjacent sides of the lens adjustment frame respectively to realize the fine tuning of the lenses in the two-dimensional direction. The centers of optical axes of the two lenses are kept concentric all the time in the fine tuning process. The integral double-lens focusing device has the advantages of effectively realizing respective focusing and matched focusing of the double lenses, controlling the precision of manual focusing to be below 0.01mm and even lower, realizing the precise adjustment of the whole lens group device in the two-dimensional direction and controlling the precision to be below 0.05mm.

Description

technical field [0001] The invention relates to a lens focusing device, in particular to an integrated double-lens focusing device. Background technique [0002] Focal length is a frequently used and most basic parameter in an optical system. During the adjustment process, the requirements must be accurate and determined. The lens is the most basic component of the optical system, and the focal length of the lens or lens group must become an important parameter to determine the relationship between the object and the image. At the same time, the accuracy of the focal length of the lens will directly affect the accuracy of the overall focal length of the entire optical system. It can be seen that the precise adjustment of the focal length of the lens is very important. [0003] At present, most of the common lens focusing devices or lens adjustment mounts with focusing function at home and abroad fix a single lens, which can realize the one-dimensional adjustment function o...

AI Technical Summary

Problems solved by technology

[0004] The focal length accuracy of the traditional lens focusing device is not high, and the center of the optical axis is unstable. Especially after combining multiple lenses, the center of the optical axis is more difficult to fix. During the adjustment process, every time a lens is adjusted, the other lenses must be adjusted in turn. , virtually increased unnecessary workload

In addition, in terms of the fixing methods of the adjustment frame or the adjustment device, some cannot be completely fixed, and some cannot be adjusted again once fixed, and the work has relatively large limitations.

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