High-precision continuous zoom lens based on double curved grooves

Abstract

The invention discloses a high-precision continuous zoom lens based on double curved grooves, and belongs to the field of a related technology of the photoelectric technology. The high-precision continuous zoom lens comprises a lens tube provided with an objective lens group, a zooming group and a compensation group arranged in sequence, and a zooming tube arranged at the periphery of the lens tube in a coaxial manner corresponding to the zooming group and the compensation group, the zooming tube is provided with two zooming curved grooves and two compensation curved grooves, zooming linear grooves are formed in the lens tube corresponding to the zooming curved grooves and the compensation curved grooves, a pin group penetrates through the curved grooves and the linear grooves and is matched with the zooming group and the compensation group in a matched manner, and the pin group continuously moves in the curved grooves and continuous movement of the zooming group and the compensation group is realized through rotation of the zooming tube so that continuous zooming of the continuous zoom lens is realized. According to the high-precision continuous zoom lens based on the double curved grooves, the structure is simple, the consistence of the optical axis of the lens in an examination place conversion process can be effectively guaranteed, the controllability of continuous zoomingis improved, and the efficiency and high precision of continuous zooming can be guaranteed.

Description

technical field [0001] The invention belongs to the related technical field of photoelectric technology, and in particular relates to a high-precision continuous zoom lens based on a hyperbolic groove. Background technique [0002] With the continuous development of TV imaging technology, it has been widely used in TV guidance, photoelectric reconnaissance and other technical fields. In the process of TV imaging, continuous zoom lens plays a very important role. Large and small targets are clearly imaged. When the target needs to be searched or observed, the short-focus large field of view is generally used, and when the target needs to be observed and tracked in detail, the long-focus small field of view is generally used, but in the process of field of view conversion , in order to prevent the observed target from disappearing, it is necessary to put forward high requirements on the consistency of the optical axis of the lens. [0003] In the existing continuous zoom lens...

AI Technical Summary

Problems solved by technology

According to the above formula, in order to reduce the movement of the optical axis, the gap between the zoom group, the compensation group and the mirror tube should be as small as possible, but too small a gap will increase the friction torque when the zoom group and compensation group move , while the existing continuous zoom lens usually drives the movement of the zoom group and the compensation group on one side. When the zoom group and the compensation group are moved due to the force on one side, the movement of the two sides of the zoom group and the compensation group is not synchronized. The extrusion deformation of the mirror tube increases the gap and frictional moment between the lens tube and the lens tube. At the same time, when the long and short focal lengths are switched, the force direction of the magnification group and the compensation group will have a large jump on the optical axis, which greatly affects the continuous zoom lens. The focusing accuracy and focusing efficiency will also adversely affect the service life of the zoom group and compensation group, and in the prior art, in order to fully ensure the optical axis consistency of the continuous zoom lens, the mirror tube and the zoom group, compensation The gap between the groups is strictly controlled, and the gap is generally less than 0.01mm, which not only increases the friction torque but also increases the difficulty of parts processing, which is not conducive to reducing the use cost of the continuous zoom lens

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