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Measurement method for optical axis shaking amount of zoom camera

A measurement method and technology of a zoom camera, which are applied in the testing of machine/structural components, measurement devices, optical axis determination, etc., can solve the problems of long time consumption, high cost of measurement equipment, complicated measurement process, etc., and achieve convenient operation and simple structure. , to ensure the effect of measurement accuracy

Active Publication Date: 2020-01-07
西安中科立德红外科技有限公司
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  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to solve the technical problems of high cost, complicated and time-consuming measurement process caused by many measuring equipments involved in the measurement method of optical axis shake of zoom camera in the prior art, and to provide a measurement of optical axis shake of zoom camera method

Method used

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  • Measurement method for optical axis shaking amount of zoom camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 , a method for measuring the optical axis shake of a zoom camera, the specific steps are as follows:

[0029] Step 1, select the corner of the building as the target 5, fix the vertical indexing table 2 on the two-dimensional adjustment frame 3, the table top of the vertical indexing table 2 is vertical, and fix the zoom camera 4 on the vertical indexing table 2 On the camera mount 1 on the table, make the rotating shaft of the vertical indexing table 2 parallel to the optical axis of the zoom camera 4, and the parallelism is one-third of the field of view angle at the preset focal length, and then adjust the zoom camera to the preset focal length;

[0030] Step 2, adjust the optical axis of the zoom camera 4 through the two-dimensional adjustment frame 3, so that the center of the optical axis is aligned with the corner of the building, and record the first lateral miss distance x from the corner of the building to the center of the zoom camera 4 0 a...

Embodiment 2

[0035] Such as figure 1 , a method for measuring the optical axis shake of a zoom camera, the specific steps are as follows:

[0036] Step 1, select the spire as the target 5, fix the vertical indexing table 2 on the two-dimensional adjustment frame 3, the table top of the vertical indexing table 2 is vertical, and fix the zoom camera 4 on the vertical indexing table 2 On the camera mount 1 on the table, make the rotating shaft of the vertical indexing table 2 parallel to the optical axis of the zoom camera 4, and the parallelism is one-third of the angle of view to be measured, and then adjust the zoom camera to the preset focal length;

[0037] Step 2, adjust the optical axis of the zoom camera 4 through the two-dimensional adjustment frame 3, so that the center of the optical axis is aligned with the spire, and record the first lateral miss distance x from the spire to the center of the zoom camera 4 0 and the first longitudinal miss amount y 0 ;

[0038] Step 3: Rotate ...

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Abstract

The invention belongs to a parameter measurement method of a zoom camera. The invention provides a measurement method for an optical axis shaking amount of a zoom camera, thereby solving technical problems of high cost caused by many involved devices, complicated measurement process and long consumed time in the existing zoom camera optical axis shaking amount measurement method in the prior art.To be specific, the method comprises: selecting a target, fixing a zoom camera, and adjusting the zoom camera to reach a preset focal length; adjusting the zoom camera to enable the central position of the optical axis of the zoom camera to be aligned with the center of the target, and recording a first transverse miss distance x0 and a first longitudinal miss distance y0 from the center of the target to the center of the zoom camera; rotating the zoom camera according to a preset angle interval, and respectively recording a transverse miss distance xn and a longitudinal miss distance yn fromthe center of the target to the center of the zoom camera; and carrying out fourier transform on the transverse miss distance and the longitudinal miss distance to obtain second-order components xa and ya and calculating an optical axis shaking amount of the zoom camera under the preset focal length.

Description

technical field [0001] The invention belongs to a parameter measurement method of a zoom camera, and in particular relates to a measurement method of an optical axis shaking amount of a zoom camera. Background technique [0002] The zoom optical system is generally composed of three parts: fixed group, zoom group and compensation group. The zoom group and compensation group move along the guide rail or cam according to specific rules to achieve continuous change of focal length and image plane stability. Zoom group and compensation group When moving along the guide rail or cam, there is a certain gap between the zoom group and compensation group and the guide rail and cam due to the processing and assembly errors of the guide rail and cam. The gap is inevitable, generally less than 0.01mm-0.02mm. When the installation direction of the zoom camera and the direction of gravity change, even if the focal length does not change, the optical axis will still change, and in the phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/04G01M11/02
CPCG01M11/0221G01M11/04
Inventor 王海赵胜强马仁旺
Owner 西安中科立德红外科技有限公司
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