High-precision optical path alignment is essential in modern optical systems, especially for high-resolution imaging and precision measurement. Misalignment of the image plane can lead to image distortion, adversely affecting overall image quality. Recent research has focused on algorithmic approaches for image tilt correction, but this paper proposes a Bidirectional Rotational Symmetry Correction (BRSC) method that combines mechanical adjustment with a contour detection algorithm for effective image plane tilt correction. The mechanical adjustment process involves bidirectional symmetry rotation of the image plane to achieve precise alignment. The edge contour detection algorithm enhances image processing by fitting an elliptical contour around detected features, enabling precise measurement of the contours. Experimental validation using a point diffraction interferometer (PDI) demonstrates the effectiveness of the proposed BRSC method in correcting image plane tilt.
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