Patent application number | Description | Published |
20100103490 | Optical Information Recording Reproducing Apparatus - In the optical information recording reproducing apparatus that makes a reference light beam to interfere with an information light beam so as to record the information of the information light beam in a recording medium based on a two light beam interference method, or irradiates the reference light beam to a recording medium so as to emit a light beam and reproduces information stored in the recording medium by leading the light beam emitted from the recording medium an the image light receiving element, the optical information recording reproducing apparatus comprises a detector to detect positional deviation of at least one of the reference light beam and the information light beam from a predetermined optical path; and a correcting mechanism to correct the positional deviation based on an output from the detector. | 04-29-2010 |
20100110865 | Optical Information Recording and Reproducing Apparatus, and Cartridge - An optical information recording and reproducing apparatus relating to the invention employs a two-beam interference method. In the optical information recording and reproducing apparatus, a moving device moves an information recording medium between a recording and reproducing position and a retracting position, and a mirror moves together with the information recording medium. When the information recording medium moves to the recording and reproducing position, the mirror moves to a position which is displaced from the at least one of the reference beam and the information beam. When the information recording medium moves to the retracting position, the mirror moves to a position where the mirror can reflect the at least one of the reference beam and the information beam toward a detector for detecting a deviation of the at least one of the reference beam and the information beam. | 05-06-2010 |
20110019510 | RECORDING HEAD AND RECORDER - A recorder has a recording medium for information recording, a light source, an optical system, a slider, and an optical waveguide. To the optical system, light from the light source enters, and the slider moves relative to the recording medium while not in contact therewith. The optical waveguide is arranged at position facing the recording medium in the slider so that light entering from the optical system is irradiated on the recording medium. Where the mode field diameter of the optical waveguide on the light output side is d and the mode field diameter thereof on the light input side is D, the mode field diameter is converted by smoothly changing the diameter of the optical waveguide to satisfy D>d. | 01-27-2011 |
20110075526 | Optical Element, Arm Mechanism, and Information Recording Device - Proposed is a technique of guiding light to a waveguide, by which the light use efficiency is increased. In order to achieve the above object, adopted is an optical element comprising, at an outer edge portion thereof, an incident surface on which light from a light source is incident, a diffraction grating surface, and an internal reflection surface which guides light incident from the incident surface to the diffraction grating surface. | 03-31-2011 |
20110128829 | Optical Recording Head And Optical Recording Apparatus - An optical recording head to record information onto a recording medium utilizing light including; a slider provided to move relatively to the recording medium; a light propagation element provided on a side surface of the slider substantially vertical against a recording surface of the recording medium so as to cause propagation of light incident with a predetermined angle to be irradiated on the recording medium; and, a prism provided on the light propagation element so as to oppose to the side surface of the slider having the light propagation element and to deflect the incident light to be incident into the light propagation element with a predetermined angle. | 06-02-2011 |
20110134740 | Optical Device, Optical Recording Head and Optical Recording Device - Provided is an optical device configured to makes it possible to enhance use efficiency of light. An optical device is provided with an optical element to deflect incident light and a fixation member on which the optical element is fixed. The optical element includes a reflective surface and a diffraction grating surface that deflects the incident light. The optical element is fixed on the fixation member to restrain displacement in accordance with temperature changes at portions thereof other than the reflective surface and the diffracting grating surface in such a condition that displacement is caused without restraint be temperature changes at the reflective surface and the diffraction grating surface. A change of the incident light in the deflection angle due to an inclination change by the reflective surface and the diffracting grating surface is suppressed by a change in a diffraction angle due to a periodical change in the diffraction grating by the displacement of the diffraction grating surface. | 06-09-2011 |
20110205866 | Near Field Light Generator, Optical Recording Head and Optical Recording Apparatus - Provided is a near field light generator to be utilized, effectively generating near field light with respect to a recording medium. Thus, disclosed is a near field light generator possessing a waveguide comprising a core and a cladding brought into contact with the core, to guide light having an electric field component perpendicular to an interface between the core and the cladding, and a metallic structure body provided on an outputting end face onto which light of the waveguide is output, to generate near field light by receiving light guided by the waveguide, wherein the metallic structure body is placed straddling the core and the cladding on the outputting end face in such a way that the metallic structure body receives the electric field component protruding from the interface to the cladding. | 08-25-2011 |
20120026847 | Optical Device, Manufacturing Method Thereof, Optically Assisted Magnetic Recording Head and Magnetic Recorder - Disclosed is an optical device including a concave surface formed of a part of a cylindrically curved surface, and the concave surface is a reflection surface. | 02-02-2012 |
20120069721 | RECORDING HEAD AND RECORDER - A recorder has a recording medium for information recording, a light source, an optical system, a slider, and an optical waveguide. To the optical system, light from the light source enters, and the slider moves relative to the recording medium while not in contact therewith. The optical waveguide is arranged at position facing the recording medium in the slider so that light entering from the optical system is irradiated on the recording medium. Where the mode field diameter of the optical waveguide on the light output side is d and the mode field diameter thereof on the light input side is D, the mode field diameter is converted by smoothly changing the diameter of the optical waveguide to satisfy D>d. | 03-22-2012 |
20120092973 | LIGHT SPOT FORMING ELEMENT, OPTICAL RECORDING HEAD, AND OPTICAL RECORDING DEVICE - Disclosed is a light spot forming element which is capable of forming a minute stabilized light spot efficiently and is easy to handle. For this purpose, there is provided a light spot forming element wherein a laser oscillation unit which has a periodic refractive index distribution and is employed as a laser resonator, and a focusing unit that receives the light emitted by this laser oscillation unit and forms a light spot by focusing this received light are formed on the same substrate. | 04-19-2012 |
20130101868 | Magnetic Recording Medium - A magnetic recording medium includes, in a main surface of a glass substrate ( | 04-25-2013 |