| 摘要 |
PROBLEM TO BE SOLVED: To anneal the magnetic layer of boundary wall surface between recording areas, for example, lands and grooves, in a short period of time with certain annealing power in the manufacture of a magneto-optical recording medium. SOLUTION: A laser beam emitted from a laser beam source 2 is divided with a grating member 4 to form an annealing beam and a tracking detection beam. Of these beams, at least the annealing beam is divided, for example, by a wollaston prism 6, to simultaneously irradiate a plurality of boundary wall surfaces with at least two annealing beams. The composition of an annealing beam emitting device 1 is selected so that the angles and polarization planes to each of the boundary wall surfaces of the optical axes of at least the two annealing beams may be nearly equal. COPYRIGHT: (C)2005,JPO&NCIPI
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