| 摘要 |
PROBLEM TO BE SOLVED: To provide device and method for reproducing an optical information recording medium reading out recording information from the optical information recording medium recorded in ultra high density at high speed and in high sensitivity without performing complicated distance control and to provide the optical information recording medium. SOLUTION: In the optical information recording medium reproducing device 40, a prism 42 whose base is formed to a conical shape is attached to a tip of a float slider 41 floating on the surface itself of the optical information recording medium 49 leaving a fixed minute gap, and a minute protrusion 43 is formed on the tip of the bottom surface of the prism 42. When the minute protrusion 43 part of the prism 42 is irradiated with a reproducing laser beam 45 from a laser light source 44, evanescent field 48 is generated from the minute protrusion 43, and the evanescent field 48 and a recording projection part 51 formed on the upper surface of the rotation driven optical information recording medium 49 and coated with a gold film 52 are coupled, and a light intensity of reflected light 46 is changed. The change in the light intensity of the reflected light 46 is detected by a detector 47, and the recording information on the optical information recording medium 49 is reproduced. |
