Device for adjusting rear intercept of lens and camera

Abstract

The invention discloses a device for adjusting the rear intercept of a lens and a camera, and the device comprises a first part, a second part, and a third part, the first part comprises a lens seat,the second part is a coarse adjustment assembly, and the third part is a fine adjustment assembly. According to the invention, the second part is connected with the third part, so that the second partcan rotate 360 degrees around the lens seat along the axial direction and can rotate at a small angle around other directions, and the inclination is roughly adjusted; six inclined set screws are uniformly distributed in the outer ring area of the ring part at the bottom of the third part of the assembly base along the axial direction; image plane inclination in different directions can be accurately adjusted; six fixing set screws are evenly distributed on the side face of the outer ring area of the ring portion of the bottom of the base in the radial direction, when the third component is locked, only three fixing set screws which are evenly distributed are needed. The rear intercept and the image plane inclination can be adjusted, the image definition in the full view field range is consistent, meanwhile, the adjusting precision is high, operation is convenient, and time is saved.

Description

technical field [0001] The invention relates to the technical field of camera adjustment, in particular to a device for adjusting the back focus of a lens and a camera. Background technique [0002] C-type mounts are widely used in current industrial cameras and industrial lenses. The distance from the installation reference plane of the C-type mount to the lens image plane is strictly regulated as 17.526mm, that is, the distance from the flange surface of the industrial camera to the image sensor plane of the camera is specified as 17.526mm, but due to differences in the C-mount processing of different camera manufacturers, the distance from the flange surface of the industrial camera to the image sensor plane of the camera will not be strictly 17.526mm, so it is impossible to increase the back focus of the lens (or the legal Lan distance) precision to achieve clear imaging, the back focus of the lens needs to be adjusted to the matching position to make the image clear, an...

AI Technical Summary

Problems solved by technology

[0002] C-type mounts are widely used in current industrial cameras and industrial lenses. The distance from the installation reference plane of the C-type mount to the lens image plane is strictly regulated as 17.526mm, that is, the distance from the flange surface of the industrial camera to the image sensor plane of the camera is specified as 17.526mm, but due to differences in the C-mount processing of different camera manufacturers, the distance from the flange surface of the industrial camera to the image sensor plane of the camera will not be strictly 17.526mm, so it is impossible to increase the back focus of the lens (or the legal Lan distance) precision to achieve clear imaging, the back focus of the lens needs to be adjusted to the matching position to make the image clear, and the flange surface of the industrial camera and the image sensor plane of the industrial camera will not be perfectly parallel to each other , there will be a certain inclination, so that the clarity of the presented image is inconsistent at different positions in the entire field of view, such as the Chinese patent "a lens position fine-tuning device for a multi-lens panoramic camera" (patent number: 201620487674.3), by rotating The micro-movement gear drives the micro-movement rack to move forward and backward in a straight line, which can realize the fine-tuning operation of the front and rear positions of multiple lenses, which is convenient and flexible, and has high adjustment accuracy. The distance error between each lens and the sensor in the imaging system improves the calibration accuracy of the panoramic camera, but the device cannot guarantee the adjusted intercept and the plane tilt of the camera image sensor during adjustment. At present, it is generally a certain distance between the camera and the lens. A spacer with a fixed thickness is added in one direction to adjust the inclination. How much to add or where to add it can only be done by constant trial and error. time, inaccurate

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