Abstract:
A method of nano-patterning, a method of manufacturing a nano-imprinting master and a discrete track magnetic recording medium are all provided. The method of nano-patterning includes (a) sequentially forming on a substrate an etching object material layer, a photoresist layer, and a metal layer patterned to a first pattern having a structure in which line patterns are repeatedly arranged with a predetermined interval; (b) irradiating light onto a surface of the metal layer to excite surface plasmon so that the photoresist layer is exposed to a second pattern by the surface plasmon; (c) removing the metal layer and developing the photoresist layer; and (d) etching the etching object material layer using the photoresist layer patterned to the second pattern as a mask.
Abstract:
An image sensor includes a plurality of color sensors, a plurality of depth sensors, a near-infrared cut filter, a color filter, a pass filter and a rejection filter. The color sensors and depth sensors are formed on a substrate. The near-infrared cut filter and the color filter are formed on the color sensors. The pass filter is formed on the depth sensors, and is adapted to transmit light having a wavelength longer than an upper limit of a visible light wavelength. The pass filter has a multi-layer structure wherein a semiconductor material and a semiconductor oxide material are alternately stacked. The rejection filter is formed over the near-infrared cut filter, the color filter and the pass filter, and is adapted to transmit light having a wavelength shorter than an upper limit of a near-infrared light wavelength.
Abstract:
A near field light generating device generating near field light from incident light by using a solid immersion mirror and a heat assisted magnetic recording head with the same are provided. The near field light generating device includes a light source; a waveguide core which transmits light; and a solid immersion mirror, which generates near field light, including an upper transmission surface through which light from the waveguide core is transmitted into the solid immersion mirror, a lower reflection surface, opposite the upper transmission surface, which reflections light incident thereon, lateral reflection surfaces, facing each other at sides of the solid immersion mirror, which reflect light incident thereon, and a lower transmission region disposed at a center of the lower reflection surface. Light reflected from the lateral reflection surfaces forms a light spot on the lower transmission region.
Abstract:
An integrated optical head is provided. In the integrated optical head, a light source emits light. A waveguide guides the light. An input coupler is located at one edge of the waveguide, and couples light emitted from the light source and transmits the coupled light to the waveguide. An output coupler is located at another edge of the waveguide, and couples light emitted from the waveguide and focuses the coupled light on an optical disc. A light path changing unit is installed on the waveguide, and changes the light path of light that has been reflected by the optical disc and then passed through the output coupler. An optical detector receives the light passed through the light path changing unit and converts the received light into an electrical signal in order to detect information from the optical disc. Accordingly, an input coupling efficiency and an output coupling efficiency are improved, such that light loss is reduced. Thus, recording and reproduction of an optical head can be improved, and a light, compact, integrated optical head can be obtained.
Abstract:
A hybrid lens unit and a hybrid lens array capable of correcting chromatic aberration and that can be manufactured easily are provided. The unit includes a lens holder, a refraction lens, and a diffraction lens part. The lens holder includes a beam passing cavity having a lens mounting groove on an upper portion of the beam passing cavity. The refraction lens has a plane portion mounted into the lens mounting groove and an aspherical portion inserted into the beam passing cavity. The diffraction lens part is coupled to a lower surface of the lens holder so as to face the aspherical portion. With such a construction, the unit can correct chromatic aberration generated from the refraction lens using the diffraction lens part and has a structure that makes mass-production possible.
Abstract:
An optical head in which a graded index (GRIN) lens is provided. The optical head includes a slider connected to an arm and flying a predetermined distance above a recording layer for data recording, a GRIN lens mounted in the slider for focusing an incident beam to form a light spot of a predetermined size on its exit surface adjacent to the recording layer, and a light-emitting unit for emitting the incident light to the GRIN lens.
Abstract:
A method of fabricating a diffractive lens array mold and an ultraviolet (UV) dispenser for use in the same. The method includes the steps of (a) fabricating a single or array diffractive lens mold using a nickel (Ni) shim; (b) fabricating a first diffractive lens array mold using an ultraviolet (UV) dispenser including the single diffractive lens mold; and (c) fabricating a second diffractive lens array mold having an inverted profile of the first diffractive lens array mold.
Abstract:
An apparatus and method for measuring an aperture of a near-field optical probe is provided. The apparatus includes a light source, an optical detector, and a filter. The light source radiates light to the near-field optical probe. The optical detector is positioned before the near-field optical probe and receives the light transmitted through the near-field optical probe to detect light intensity. The filter is disposed between the light source and the optical detector and transmits only light of wavelengths in a specific mode from the light transmitted through the near-field optical probe. Thus, an aperture diameter of the near-field optical probe can accurately be measured in real-time without damaging the near-field optical probe.
Abstract:
A light delivery module, a method of fabricating the same, a heat-assisted magnetic recording head using the light delivery module are provided. The light delivery module delivers light emitted from a light source. The light delivery module includes an optical waveguide having an inclined plane of an angle Φ with respect to an incident light axis to deliver an incident light, and a nano aperture changing an energy distribution of the light delivered through the inclined plane to generate an enhanced near-field. The heat-assisted magnetic recording head is mounted on one end of a slider with an air bearing surface to perform a recording operation on a recording medium. The heat-assisted magnetic recording head includes a magnetic path forming unit forming a magnetic field for recording, a light source emitting light for heating a predetermined region of a recording surface of the recording medium, and the light delivery module.
Abstract:
An optical pickup and an optical recording and/or reproducing apparatus using the optical pickup are provided. The optical pickup includes: a light source; an optical bench on which the light source is mounted; a focusing member including an objective lens, focusing light emitted from the light source to form a light spot on an optical information storage medium; and an optical path forming member having a transparent block that includes a light entrance/exit surface on which the optical bench and the focusing member are arranged, a first reflection surface, and a second reflection surface opposing the first reflection surface, where the optical path forming member directs the light emitted from the light source toward the objective lens by reflecting the light emitted from the light source on the first and second reflection surfaces. The optical pickup satisfies the requirement for smaller, slimmer design and can be integrated using semiconductor manufacturing processes.