High-rigidity switching mechanism of optical lens group of crank slide block

Abstract

The invention relates to a high-rigidity switching mechanism of an optical lens group of a crank slide block. The switching mechanism is used for achieving radial rotary switching-in and switching-outfunctions of a certain lens group in an optical system. A rotary driving device drives a switching lens group to rotate, thereby achieving switching-in and switching out of the switching lens group in an optical lens. The switching group is connected with a sliding block and a linear guide rail through a bearing connection rod, so auxiliary bearing is provided and stability of the switching lensgroup under a dynamic condition is improved. Through design of the angle of the crank sliding block mechanism, it is achieved that unbalanced torque of the switching lens group can be overcome by imposing quite small locking electromagnetic force on the sliding block. According to the invention, by adding the bearing connection rod, the sliding block and the linear guide rail on a rotary radial switching mechanism, under the condition that the original switching movement is not affected, the bearing rigidity and locking functions of the lens group are effectively improved; and working reliability of the switching module under conditions of vibration and impacting is improved.

Description

technical field [0001] The invention belongs to the technical field of optical instruments, and relates to a high-rigidity slider crank optical mirror group switching mechanism, which is mainly aimed at optical systems with mirror group cut-in and cut-out requirements, such as zoom mirror groups, filter mirror groups, etc., can Provides high support rigidity and locking performance of the lens group. Background technique [0002] Optical systems often need to insert or remove part of the lens group in the optical path to achieve different functions or performances. For example, the optical system of the search and tracking equipment realizes different fields of view and resolutions through the switching of the zoom lens group, and the optical system of the warning equipment realizes the separate detection of different bands through the switching of different filters. Most infrared optical systems are The non-uniformity correction function needs to be realized through the in...

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Problems solved by technology

[0006] In order to avoid the deficiencies of the prior art, the present invention proposes a high-rigidity crank-slider optical mirror group switching mechanism. Aiming at the problem of poor support rigidity of the traditional rotary switching mechanism, based on the crank-slider configuration, a simple Reliable, high-rigidity switching mechanism for the optical mirror group. By adding a set of supporting connecting rods, the support rigidity of the switching mirror group is greatly improved. At the same time, the locking performance of the switching mirror group is improved through the design of the angle of the crank slider mechanism.

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