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The Processing Method of Frame Deformation of Infrared Continuous Zoom Lens

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The Processing Method of Frame Deformation of Infrared Continuous Zoom Lens

Issue Time:2021-05-22

In the actual zooming process of the infrared continuous zoom lens, due to the deformation of the lens frame, the lens will be shifted and deflected to different degrees during the movement of the Infrared optical system, resulting in the shift of the optical axis and the deterioration of the image quality. It can be seen that it is essential to ensure the smoothness and smoothness of the frame in the moving process. The following is the processing method of the deformation of the infrared continuous lens frame.

The position of the guide pin

According to the structural characteristics of the infrared continuous zoom lens, the guide pin moves with the frame, so the installation position of the guide pin will also have different effects on the lens during the zooming process. 
Therefore, it is necessary to analyze the position of the guide pin on the frame.

The movement of the lens frame mainly affects the deviation of the Y-axis and the deflection of the Z-axis of the lens. When the guide pin is at the 1/2 position of the lens frame, the influence on the lens is the least, and the guide pin is at the 0 positions and the 1 position.

Analysis of the length of the frame

It is impossible to use a simple, specific length to consider whether a frame of this length is appropriate.

Frames with different diameters and the same length will also cause different offsets and deflections to the lens when moving. Therefore, the analysis result of the length of the frame needs to meet the requirements of different forms of frames, so the ratio of the length to the diameter of the frame should be selected for analysis. The shortest length-to-diameter ratio that meets the installation conditions is 0.16:1. The longest length-to-diameter ratio that meets the optical system is 1.2:1, so the ratio of the length of the sports frame to the diameter of the sports frame is selected as 0.2:1, 0.4:1, and 0.6:1, respectively. , 0.8:1, 1:1, 1.2:1.

Processing deformation analysis

Frame processing should reasonably handle the machine tool stiffness, fixture stiffness, tool stiffness, and workpiece stiffness in the processing system. These four stiffnesses have an important impact on processing accuracy. The practice has proved that the direct cause of the deformation of the parts during the machining process is the effect of force, which makes the position difference between the tool and the machined surface, and changes the size and shape of the machined parts, resulting in errors.

Improvement of clamping scheme

The number, position, and size of the clamping force have an important influence on the clamping plan, and any change in any of these factors will cause the lens frame to deform. The optimization measures of the clamping scheme are as follows.

(1) Optimize the amount of clamping force. Change the centralized clamping to uniform clamping to make the parts deform evenly.

(2) Optimize the placement position of the clamping force. The clamping force is applied to the rigid surface.

(3) Optimize the size of the clamping force. If the clamping force's number and position are fixed, if the cylinder body is clamped to ensure stability, the smallest possible clamping force can be used.

Correction of the frame of the infrared continuous zoom lens can ensure the imaging quality of the lens and maximize the effect of the infrared continuous zoom lens. If you still want to know more relevant information after reading the above content, you can get in touch with us, and we will provide you with professional consultation and solutions.

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