| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a mold for obtaining a minute corner cube shape having a square on a face has not been made by cutting work. SOLUTION: Plates having the same thickness as the side of a minute square are laminated and right-angled isosceles triangles are cut and worked on laminated faces by a known method. The sides of the plates of half the number are cut by 1/2 amount of the bases of the right-angled triangles and thereafter while shifting the same by amount of height of the right-angled triangles, these are alternately relaminated and fixed. Thereby, the minute corner cube mold is easily obtained.
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