Abstract: An optical system and an information apparatus using the optical system are provided. The optical system includes an optical bench on which a light source and a photodetector including a main photodetector receiving the light are mounted. A lens unit is coupled to the optical bench, and an optical path separating member separates an optical path of light emitted from the light source and propagating toward the lens unit and an optical path of light incident from the lens unit. The optical system may include a monitor photodetector and/or an optical path forming unit coupled to the optical bench. The monitor photodetector receives a portion of the light emitted from the light source. The optical path forming unit includes a first mirror reflecting the light emitted from the light source and a second mirror reflecting the light incident from the lens unit and reflected by the first mirror.

Abstract: An optical system and an information apparatus using the optical system are provided. The optical system includes an optical bench on which a light source and a photodetector including a main photodetector receiving the light are mounted. A lens unit is coupled to the optical bench, and an optical path separating member separates an optical path of light emitted from the light source and propagating toward the lens unit and an optical path of light incident from the lens unit. The optical system may include a monitor photodetector and/or an optical path forming unit coupled to the optical bench. The monitor photodetector receives a portion of the light emitted from the light source. The optical path forming unit includes a first mirror reflecting the light emitted from the light source and a second mirror reflecting the light incident from the lens unit and reflected by the first mirror.

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 optical system including a light source that generates light, a mirror changing an optical path of the light generated by the light source and an aberration correcting element that corrects aberrations generated in the light reflected from the mirror due to an error in the surface shape of the mirror.

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

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: 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 image stabilizer of a camera is provided that can compensate for the effects of the shaking of a main body that includes a lens, in real-time, by using an optical element. The image stabilizer includes: an optical element that can be tilted, which is installed on an optical path, which transmits light and which tilts to shift the transmitted light to compensate for the optical path; a sensor provided near the main body, which senses the shaking of the main body; a calculating unit which receives a sensing signal from the sensor and calculates the necessary tilt angle of the optical element; and an actuator which drives the optical element according to the result output from the calculating unit. The image stabilizer can sense the shaking of the main body in real-time and prevent shifting of the image formed on an image forming surface.

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: An optical bench, an integrated optical system, and an optical alignment method are provided. The integrated optical system includes a light source; a main photodetector which receives light that is emitted from the light source and reflected from a disc; an optical bench on which the light source and the main photodetector are installed; a lens unit installed on the optical bench; and an optical path separator which separates a path of light from the light source to the lens unit and a path of light from the lens unit. The optical bench includes a landing recess which is open upward toward the disc and which has an aperture on a bottom thereof to pass light. The optical path separator is mounted within the landing recess.

Abstract: An optical system including a light source that generates light, a mirror changing an optical path of the light generated by the light source and an aberration correcting element that corrects aberrations generated in the light reflected from the mirror due to an error in the surface shape of the mirror.

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 system and an information apparatus using the optical system are provided. The optical system includes an optical bench on which a light source and a photodetector including a main photodetector receiving the light are mounted. A lens unit is coupled to the optical bench, and an optical path separating member separates an optical path of light emitted from the light source and propagating toward the lens unit and an optical path of light incident from the lens unit. The optical system may include a monitor photodetector and/or an optical path forming unit coupled to the optical bench. The monitor photodetector receives a portion of the light emitted from the light source. The optical path forming unit includes a first mirror reflecting the light emitted from the light source and a second mirror reflecting the light incident from the lens unit and reflected by the first mirror.

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.