An Optical Diagnosis System for In-situ Observing and Estimating Crystal Growth Situation

摘要

An optical diagnosis and analysis system is developed to in-situ observe and estimate crystal growth situation. A polarizing filter and a high pass binary amplitude filter are used in a common microscopy to observe the phase object and also to inverse the image contrast and strengthen the image edge. Meanwhile, a series of image processing techniques, such as median filtering, Robert operator, optimal threshold method and so on, are introduced to analyze the images of the crystal. An improved Hough transformation is carried out to get the pattern of crystal lattice. Finally, according to the integrity of crystal lattice and the evenness in the crystal lattice, some advice on the crystal growth situation is given. Experimental results with the acquired images demonstrate that the proposed system is feasible.