| 摘要 |
FIELD: information storage equipment. SUBSTANCE: required number of lands are made in optical base surface as cavities, which depth is less than 30% of depth of pits. Train of lands along track or lands in adjacent tracks provide macroscopic pattern. Cavity-designed lands may be U-shaped with width which is approximately corresponds to pit width. Also lands may be V-shaped with width lesser than that of pits. Corresponding method for manufacturing of glass master disk involves track-by-track exposition of photo sensitive layer of glass master disk by laser beam in region of pits under processing and development of glass master disk. Intensity of laser beam in land region which should appear as cavities in optical base single is decreased down to value which is not greater than half of laser beam intensity leading to generation of pits. EFFECT: possibility to apply label which is resistant to faking, is easy to detect by optical methods in order to solve problem of illegal copies. 5 cl, 2 dwg |
