发明授权
US07061852B2 Recording apparatus for a holographic recording medium including an alignment laser having a different wavelength from the recording laser 失效
包括具有与记录激光器不同的波长的对准激光的全息记录介质的记录装置

Recording apparatus for a holographic recording medium including an alignment laser having a different wavelength from the recording laser
摘要:
A recording apparatus for holographic recording medium having an alignment mark and designed to irradiate a recording light beam onto a recording region of holographic recording medium to record information as a hologram. This apparatus comprises a recording laser recording the hologram onto the medium, an alignment laser irradiating an alignment light beam onto the medium, the alignment light beam being less absorbed than the recording light beam by the medium, and being reflected by the medium, a first lens converging the recording light beam and directing it toward the medium, a second lens converging the alignment light beam and directing it toward the medium, a photodetector detecting a light intensity of the alignment light beam reflected from the medium to recognize the alignment mark, and a driving mechanism adjusting a region to be irradiated with the recording light beam relative to the medium based on the alignment mark.
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