A lens fast switching device and zoom lens with the device

Abstract

The lens quick switching device of the present invention comprises a lens barrel with a stop protrusion at one end, which is accommodated in the lens barrel and a lens holder on which the lens is installed. The repulsion mechanism between the lens holder and the lens holder realizes that the lens holder is quickly away from the limit protrusion. The retractable limit part is located on the side wall of the lens barrel, and the pressure ring is located at the other end of the lens barrel. In the first state, the limit part protrudes, and the mirror base is against the limit part under the action of the repulsion mechanism. At this time, the lens is in the first position, and in the second state , the stopper is retracted, and the lens holder moves to the second position under the action of the repulsion mechanism to abut against the pressure ring, so as to complete the switch from the first position to the second position of the lens, and reliably realize two specific positions. switch. The process can realize the switch of the lens in millisecond level, so as to achieve the purpose of fast switch, and the present invention also provides a zoom lens accordingly.

Description

technical field [0001] The invention relates to the technical field of optical precision mechanical structures, in particular to a lens fast switching device and a zoom lens provided with the device. Background technique [0002] The optical lens is an essential part of the machine vision system, which directly affects the quality of the image and affects the realization and effect of the algorithm. Optical lenses can be divided into short-focus lenses, medium-focus lenses, and telephoto lenses in terms of focal length; wide-angle, standard, and telephoto lenses in terms of field of view; fixed-aperture fixed-focus lenses and manual aperture fixed-focus lenses in terms of structure. Auto-iris fixed-focus lenses, manual zoom lenses, auto-zoom lenses, auto-iris electric zoom lenses, electric three-variable (aperture, focal length, and focus) lenses, etc. [0003] The zoom lens can change the shooting range by changing the focal length without changing the shooting distance, s...

AI Technical Summary

Problems solved by technology

This method has stable movement and long focusing distance, but the structure is relatively complicated, the aperture will be relatively large, and the most important thing is that it cannot achieve very fast switching

Some optomechanical systems only need to achieve two specific positions for focusing, and the focusing process requires the lens to switch to the specified position within a few milliseconds, so the commonly used mechanisms are often unable to achieve

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