Information recording medium, information recording method, and information reproduction method
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United States of America Patent
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May 22, 2018
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app pub date -
May 19, 2015
filing date -
May 19, 2015
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Abstract
It is an object of the present invention to improve visibility for observation with naked eyes or for camera shooting without spoiling the appearance during marking inside a transparent medium using a laser. By irradiating an inside of a transparent medium with a laser, the present invention forms a micro-denatured region in each of a first layer and a second layer inside the medium. The micro-denatured regions in the respective layers are arranged out of alignment with each other on a two-dimensional plane (refer to FIG. 1).
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