A system and method for detecting the surface defect contour of a satellite telescope lens

Abstract

The invention discloses a system and a method for detecting surface defect contours of a satellite telescope lens. Determine the position of the direct light source through the first sliding component and the vertical calibrator, adjust the height of the ruler slide rail, so that the lens of the satellite telescope under test can be completely illuminated, and the portable handheld camera shoots the lens of the satellite telescope under test at a certain angle. The image (optical defect image) is transmitted to the computer to extract the outline, without size constraints, and the system is easy to assemble and easy to carry, which greatly saves the equipment cost. Add weight items to the traditional clustering function to optimize the function, and then perform pixel classification processing; use the edge detection algorithm to extract the rough contour of the defect, that is, edge contour optimization, and then use discrete Chebyshev polynomials to fit sub-pixels Points are used to further refine the outline and improve the fitting accuracy, which improves the accuracy of defect detection, so that subsequent quantitative analysis of the defects of satellite telescope lenses can be carried out.

Description

technical field [0001] The invention belongs to the technical field of surface defect detection, and more specifically, relates to a satellite telescope lens surface defect contour detection system and method. Background technique [0002] Ultra-precision optical components are an important part of many high-precision instruments and equipment systems. In the field of aerospace, a large number of optical components are used in satellites, the most notable being satellite telescopes, and the diameter is usually on the order of meters. For satellites, its main function is to photograph, reconnaissance, and monitor the ground. Therefore, space telescopes used for satellites require high imaging sensitivity, high precision, and strong resolution. The satellite telescope is in the atmospheric environment, and the gas will not affect the shooting process. But in space, due to its very low temperature, the gas in the nebula (such as hydrogen, methane) will solidify into particles...

AI Technical Summary

Problems solved by technology

For the traditional precision system for detecting surface defects, although the detection accuracy is high, the equipment assembly is complicated and the cost is high, and there are strict requirements on the positional relationship and movement of the components. If the specific posture changes, the The directional indication also changes accordingly, so the operator is required to have a certain knowledge base in the optical field

The biggest disadvantage of the precision system is that the size of the detection optical components is limited. The measured objects are usually in the order of centimeters or decimeters, and it is impossible to perform in-situ non-contact defect detection on large-size optical components.

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