Automatic zooming mechanism driven by double stepping motors

Abstract

The invention discloses an automatic zooming mechanism driven by double stepping motors. The automatic zooming mechanism comprises two screw-nut pairs, two stepping motors and a guide rail mechanism. The two screw-nut pairs are respectively fixed with a zooming group and a compensation group in a zooming system, and each screw-nut pair is driven by one stepping motor. The zooming group and the compensation group are both arranged in the guide rail mechanism and can linearly move along the rail direction of the guide rail mechanism. The rail direction of the guide rail mechanism is parallel to the optical axis direction, and the two stepping motors are driven by control software and automatically control the rotating step numbers thereof. The mechanism is used for accurately positioning the zooming system in the zooming process, and the double stepping motors can adapt to the curvature of a zooming curve, so that images of an optical system are kept clear in the continuous zooming process, and the problem that an image cannot be kept clear all the time in the zooming process due to abrupt change of a zooming curve of a zooming system and poor axial position precision of an optical lens is solved.

Description

technical field [0001] The invention relates to the technical field of optical automatic zooming, in particular to an automatic zooming mechanism driven by double stepping motors. Background technique [0002] At present, in the field of optical instruments, in order to solve the contradiction between the field of view and the viewing distance, zoom systems are often used. For reasons such as long-distance transmission and image sharing, more and more detection element imaging optical systems are used in the field of optical instruments. Compared with the traditional visual optical system, the detection element imaging optical system requires higher imaging quality. In the detection unit imaging automatic zoom system, not only the radial direction of the zoom optical system has high precision requirements, but also the axial position accuracy of the zoom optical system is also high, and the zoom system is in the same direction as the theoretical zoom curve during the zoomin...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides an automatic zoom mechanism driven by double stepping motors, which is used to precisely position the zoom system during the zooming process, and the double stepping motors can adapt the curvature of the zoom curve, so that the optical system can continuously zoom The image remains clear during the zooming process, which solves the problem that the zooming system’s zoom curve changes sharply and the image cannot always be kept clear during the zooming process due to poor axial position accuracy of the optical lens.

Images