Optical recording device, optical recording method, and optical recording medium
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United States of America Patent
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May 16, 2017
Grant Date -
Sep 10, 2015
app pub date -
Sep 14, 2012
filing date -
Sep 14, 2012
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Abstract
When recording is performed by focusing a short pulse laser on an inside of a transparent medium such as quartz glass, and forming a minute deformed region in which the refractive index is different from that of surroundings thereof, it is difficult to ensure a recording quality. Therefore, a recorded dot length in a depth direction is monitored 111 and a power of the laser light is adjusted based on the monitored recorded dot length, or a difference between a focus position where a region of the recorded dots appears brighter than the surroundings and a focus position where the region of the recorded dots appears darker than the surroundings is measured and the power of the laser light is adjusted based on the difference.
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