Reader for identification symbol or character of disk-shaped matter
专利汇可以提供Reader for identification symbol or character of disk-shaped matter专利检索，专利查询，专利分析的服务。并且PURPOSE: To read the indentification characters without positioning a disk by picking up a disk having a linear notch to store it in the form of the digital information, detecting both the direction and position of said notch and reading characters based on the detected direction and position of the linear notch.
CONSTITUTION: When a wafer 2 shifted by a shift device 10 passes over a photosensor 11, an image pickup device 7 stores the digital picture information of the wafer 2 to a memory part 8. The 1st processing part 13 calculates the direction and position of a notch 3 from the information. In other words, a notched fringe picture element detecting part 15 finds out a noticed fringe picture element from the picture of the wafer 2 and delivers the position of the picture element. A fringe equidistance detecting part 16 finds out two fringe picture elements set at a fixed distance from the noticed fringe picture element and delivers the positions of these picture elements. A straight line discriminating part 17 delivers "genuine" when three fringe picture elements are put on a straight line. The direction and position of the notch 3 are calculated by a notch direction calculating part 19. Then the 2nd processing part 14 segments the part of a character 1 for indentification on the basis of those above-mentioned information. Thus a character having no inclination is read.
COPYRIGHT: (C)1984,JPO&Japio，下面是Reader for identification symbol or character of disk-shaped matter专利的具体信息内容。
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