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: A micro mirror and a method of manufacturing the same are provided. The micro mirror includes a silicon substrate having a first slant plane and a second slant plane that face each other, and a clad layer including a first mirror surface and a second mirror surface respectively formed on the first slant plane and the second slant plane, wherein the clad layer reflects light.

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.

Abstract: Provided is an objective optical system employing a gradient index (GRIN) lens. A refractive index of the GRIN lens is changed in an axial direction and a direction perpendicular to the axial direction. The GRIN lens has a refractive index n satisfying the following equation: n ? ( r , z ) = ? i = 0 ? ? n r2i ? r 2 ? i + ? j = 0 ? ? n zj ? z j where z is a distance from the center of the lens in the axial direction and r is a distance from the center of the lens in the direction perpendicular to the axial direction. Thus, an objective optical system with a high numerical aperture can correct aberration.

Abstract: Provided is a method of exposing using an electron beam. The provided method of exposing using the electron beam includes defining main fields on an exposure area of an electron beam exposure target and defining a plurality of sub-fields on the main fields, selecting a main field to be exposed, selecting at least one sub-field of the selected main field, exposing the selected sub-field by using the electron beam, and selecting at least one of the other sub-field, which is not adjacent to the previously selected sub-field and not exposed yet, and exposing the sub-field by using the electron beam.

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.

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 objective lens system and an optical pickup apparatus using the same are provided. The objective lens system includes a diffractive optical element, and a half-ball lens disposed between the diffractive optical element and the medium, the half-ball lens having a spherical surface on a side facing the diffractive optical element, and an aspheric membrane formed on the spherical surface of the half-ball lens. The aspheric membrane comprises a plastic material or an ultraviolet-cured resin. The optical pickup apparatus includes a light source, an optical path converter disposed between the light source and an information storage medium, the above-described objective lens system disposed between the optical path converter and the information storage medium, and a photodetector which receives light reflected from the information storage medium and passed through the objective lens system and the optical path converter and which detects an information signal and an error signal.

Abstract: A planar lens capable of compensating for chromatic aberration and which is easy to manufacture and enables easy assembling of optical pickups and a method for fabricating the planar lens are provided. The planar lens includes a transparent substrate with a lens cavity in a surface of the transparent substrate, and a lens element formed in the lens cavity with a first refracting surface in contact with the bottom of the lens cavity and a second diffracting surface having a diffraction grating opposite to the first refracting surface.

Abstract: A micro mirror and a method of manufacturing the same are provided. The micro mirror includes a silicon substrate having a first slant plane and a second slant plane that face each other, and a clad layer including a first mirror surface and a second mirror surface respectively formed on the first slant plane and the second slant plane, wherein the clad layer reflects light.

Abstract: A planar lens capable of compensating for chromatic aberration and which is easy to manufacture and enables easy assembling of optical pickups and a method for fabricating the planar lens are provided. The planar lens includes a transparent substrate with a lens cavity in a surface of the transparent substrate, and a lens element formed in the lens cavity with a first refracting surface in contact with the bottom of the lens cavity and a second diffracting surface having a diffraction grating opposite to the first refracting surface.

Abstract: A method of manufacturing a micro-lens in which at least one first lens is first molded using a compression technique. A lens holder is produced including a hole in which the first lens is seated. A second lens is formed on a bottom surface of the lens holder. The first and second lenses are combined by aligning the first and second lenses along an optical axis in the hole of the lens holder. Thus, a hybrid micro-lens composed of a diffractive lens and a refractive lens, along with an array of the hybrid micro-lenses are easily manufactured.

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 hybrid lens with a high numerical aperture is described. The hybrid lens comprises a refractive surface that refracts incident light and a diffractive surface that diffracts light exiting the lens, the diffracting surface designed by a sag satisfying the following Equation: s ? ? ? a ? ? ? g = f D + m ? ? ? ? - f D ? ? 2 + r ? ? 2 n - 1 , wherein fD is a distance from a center peak to a focal point of the hybrid lens, r is a height from a center axis to each peak of the hybrid lens, n is the refractive index of the hybrid lens, ? is the wavelength of incident light and m is an integer. The hybrid lens is small and lightweight and capable of removing chromatic aberration.

Abstract: Provided is a method of exposing using an electron beam. The provided method of exposing using the electron beam includes defining main fields on an exposure area of an electron beam exposure target and defining a plurality of sub-fields on the main fields, selecting a main field to be exposed, selecting at least one sub-field of the selected main field, exposing the selected sub-field by using the electron beam, and selecting at least one of the other sub-field, which is not adjacent to the previously selected sub-field and not exposed yet, and exposing the sub-field by using the electron beam.

Abstract: Provided are a hybrid lens and method of fabricating the same. A hybrid lens designed as a combination of a refractive lens and a diffractive lens includes a refractive lens including a first spherical surface and a second planar surface, a diffractive lens that is bonded onto the first surface of the refractive lens and includes a refractive portion for correcting spherical aberration, and a lens holder attached to an outer perimeter of the first surface of the refractive lens. The method eliminates the need for high temperature heating or cooling or a high pressure process while allowing rapid and simple processing at room temperature under low pressure and thus high volume production.

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 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.

Abstract: A micro-lens array and manufacturing method. A hybrid micro-lens in which a refractive lens and a diffraction lens are formed includes: a refractive lens; a first ultraviolet hardening material which is bonded on a curved surface of the refractive lens to form an aspheric surface; a support substrate including a concave portion into which the refractive lens is inserted and supported; and a diffraction lens which is formed at a position corresponding to the refractive lens disposed on the support substrate.

Abstract: An integrated optical pickup and a manufacturing method thereof, and an optical information storage system including the pickup.