Abstract: A method and apparatus for preventing a collision between a recording medium and a lens are disclosed. The method for preventing the collision between the recording medium and the lens includes controlling a gap error signal (GES) between the recording medium and the lens to be maintained at a near field level, detecting a collision between the recording medium and the lens, pulling out the lens from the recording medium during a predetermined time so as to prevent a re-collision between the recording medium and the lens, and re-controlling the gap error signal (GES) between the recording medium and the lens to be re-maintained at the near field level.

Abstract: The present invention provides a recording/reproducing method for a recording medium including a data recording layer and a user information recording layer, wherein the recording/reproducing method includes the steps of: receiving inputted user information; determining whether the inputted user information matches the user information recorded on the user information recording layer of the recording medium; and recording data onto the data recording layer of the recording medium, or reproducing data of the data recording layer, in accordance with the result of the determination.

Abstract: A tilt control method of a recording medium comprises fixing the recording medium to a recording reproducing apparatus; performing first tilt compensation in a state that the recording medium is stopped; and performing second tilt compensation in a state that the recording medium in which the first tilt compensation has been performed is rotated.

Abstract: An apparatus for recording/reproducing data using holography technology and a method of reproducing data using the same are disclosed. The recording/reproducing apparatus includes an optical path adjuster which adjusts the path of light emitted from a light source and irradiates the light to a predetermined position of a recording medium, a light reflecting unit which reflects the light transmitting through the recording medium to the predetermined position of the recording medium, an image sensor which receives the reflected light and reproduces data included in the reflected light, and a light receiving unit receiving light, which is not transmitted through the recording medium and is diffracted from the recording medium, and generating a monitoring signal. Accordingly, it is possible to provide a simple optical system suitable for the recording/reproducing apparatus using the holography technology and an efficient method of reproducing data using the same.

Abstract: An apparatus for recording/reproducing data using holography technology and a method of reproducing data using the same are disclosed. The recording/reproducing apparatus includes an optical path adjuster which adjusts the path of light emitted from a light source and irradiates the light to a predetermined position of a recording medium, a light reflecting unit which reflects the light transmitting through the recording medium to the predetermined position of the recording medium, an image sensor which receives the reflected light and reproduces data included in the reflected light, and a light receiving unit receiving light, which is not transmitted through the recording medium and is diffracted from the recording medium, and generating a monitoring signal. Accordingly, it is possible to provide a simple optical system suitable for the recording/reproducing apparatus using the holography technology and an efficient method of reproducing data using the same.

Abstract: An information storage medium stored hologram data images and an apparatus for reproducing data image from the same are provided. The medium includes a line-type servo image formed on one side of a hologram data image in radial direction. The apparatus includes an information storage medium, the first photodetector, and a signal processor. The first photodetector detects a servo image from the information storage medium and the signal processor generates at least one of a servo control signal and an address signal from a signal detected by the first photodetector.

Abstract: Provided is a method of controlling tracking of an information recording medium including an area for storing a holographic image and an area for storing servo spots formed discretely and at a predetermined interval, which is achieved by obtaining an RF-SUM signal by adding all of detection signals of a quadrant photodetector for detecting the servo spot, monitoring whether the RF-SUM signal exceeds a predetermined level, and performing tracking control in a section where the RF-SUM signal exceeds the predetermined level. Also provided is a related apparatus.