CCD focusing mechanism for visible optical imaging system

An optical imaging system and focusing technology, which is applied in optics, optical components, and camera focusing devices, etc., can solve problems such as the influence of focusing accuracy, and achieve the effects of no sticking, strong carrying capacity, and high focusing accuracy

Inactive Publication Date: 2017-12-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The present invention proposes a CCD focusing mechanism for a visible optical imaging system in order to solve the technical problem of controlling the empty back error range of the screw nut mechanism of the visible TV measurement system and avoid the impact of the empty back error on the focusing accuracy

Method used

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  • CCD focusing mechanism for visible optical imaging system
  • CCD focusing mechanism for visible optical imaging system
  • CCD focusing mechanism for visible optical imaging system

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Such as Figure 1 to Figure 5 As shown, a CCD focusing mechanism for a visible optical imaging system includes a focusing base 1, a screw seat 3, a screw shaft 5, a first bearing 6, a limit stop 7, a screw nut 8, CCD mount 11 , second bearing 13 , coupling 16 , stepper motor 17 , linear potentiometer 20 , potentiometer connector 21 , guide rail 22 and third bearing 24 .

[0034] Focusing base 1 is the base and integrated platform of the entire focusing mechanism, and integrates the rest of the components together. It is made of high-strength aluminum alloy material 7A09. After reasonable structural design and a large number of lightweight designs, it adopts a special manufacturing process. While ensuring its excellent strength, rigidity and dimensional stability, the overall mass of the focusing base 1 is greatly reduced.

[0035] The screw base 3 is installed...

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Abstract

The invention relates to a CCD focusing mechanism for a visible optical imaging system, and belongs to the field of adjustment for compensating camera focal plane defocusing. The CCD focusing mechanism is provided in order to solve a technical problem of camera focal plane defocusing of a visible television measuring system, and is characterized in that a stepper motor drives a lead screw shaft, a CCD mounting base is driven through transmission of a lead screw nut, the CCD mounting base slides on a guide rail through a guide rail sliding block, a linear potentiometer detects the position of the CCD mounting base in real time, and the CCD focusing mechanism for the visible light imaging system realizes translation focusing. The CCD focusing mechanism can operate steadily and smoothly within a range of -40 DEG C and +60 DEG C, does not get stuck, has the prominent advantages of high focusing accuracy, high carrying capacity, large stroke range and good environment adaptability, and can be applied to adjustment and compensation for camera focal plane defocusing caused by the factors such as the temperature, acting target distance variations, air pressure and vibration.

Description

technical field [0001] The invention relates to a CCD focusing mechanism used in a visible optical imaging system, in particular to a CCD focusing mechanism for screw nut focusing, which belongs to the field of camera focal plane defocus compensation. Background technique [0002] The photoelectric theodolite is a theodolite that adopts photoelectric technology and has the function of real-time tracking and measurement. The visible TV measurement system is the main system of the photoelectric theodolite, which plays a role in real-time tracking and measurement of moving targets in the photoelectric theodolite. In order to ensure that the optical system for measuring visible TV can image the moving target clearly, the focusing mechanism is essential. Its main function is to adjust the position of the focusing lens group or the digital CCD camera when the target distance changes or the ambient temperature changes to ensure clear images. In order to meet the requirements of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04G02B7/08G03B13/34
CPCG02B7/04G02B7/08G03B13/34
Inventor 刘星洋陈宁李冠楠李毅郭劲
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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