Electric 2.8-12 zoom, electric focus monitoring lens and its control method

Abstract

The invention relates to an electric 2.8-12 zoom, electric focus monitoring lens and its control method. The lens includes a front group lens base and a rear group lens base, and the front group lens base is movably installed in the front group lens barrel. The outer side of the front group lens barrel is provided with a front group fan-shaped cam that drives the front group mirror base to move back and forth. The rear group mirror base is movably installed in the rear group lens barrel. The rear cam that the seat moves back and forth, the front group lens barrel and the rear group lens barrel are respectively connected with the reduction box through two main body guide nails; the focus stepping motor and the zoom stepping motor are arranged in the reduction box, and the The focus gear meshed with the output gear of the focus stepping motor is integrally produced on the front group of sector cams, which saves a lot of manpower and material resources; the focus stepping motor and the zoom stepping motor are arranged on the same side of the reduction box, which solves the structural interference Problem; the number of steps of the two stepping motors is 3400 steps, which makes the focusing precision high, the structure reasonable and the production easy.

Description

technical field [0001] The invention relates to a camera lens device of a monitoring system, in particular to an electric 2.8-12 zoom, electric focus monitoring lens and a control method thereof. Background technique [0002] With the rapid development of science and technology and the gradual improvement of people's safety awareness, the requirements for lens quality are getting higher and higher, such as high strength, high impact resistance, wide operating temperature range, and electromechanical integrated control. As the mold continues to mature, the lens is correspondingly easy to be plasticized. For lens manufacturers, mass-produced lenses must have good consistency, high yield, and good consistency of back focus. Plastic is a good material choice. [0003] In the monitoring industry, although conventional MFZ lenses also use electric zoom and electric focus, they have problems such as few steps, low focusing accuracy, insufficient structure, and complicated producti...

AI Technical Summary

Problems solved by technology

[0003] In the monitoring industry, although conventional MFZ lenses also use electric zoom and electric focus, they have problems such as few steps, low focusing accuracy, insufficient structure, and complicated production.

For example: 1. The number of steps of the MFZ motor is 1000 steps; 2. The gear and the cam of the focus group used by the MFZ are independent, and they are fixed together by screw locking, which requires a lot of manpower and material resources; 3. The focus motor and the zoom motor are separated on both sides, and the structure easy to interfere

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