Abstract: To provide an optical module capable of miniaturization, the optical module, to which an optical plug provided at one end of an optical transmission path is attached, so as to transmit and receive signal light via the optical transmission path for information communication, includes: a transparent substrate having light transmittance property with respect to a wavelength of used signal light; an optical socket, which is arranged on one surface side of the transparent substrate and to which the optical plug is attached; an optical element, which is arranged on the other surface side of the transparent substrate and emits the signal light to the one surface side of the transparent substrate according to a supplied electrical signal, or generates an electrical signal according to the intensity of the signal light supplied from the other surface of the transparent substrate; and a reflective portion, which is arranged on the other surface of the transparent substrate and changes a path of the signal light emitted

Abstract: The present invention provides an electro-optical device can include a dot-like light source array in which a plurality of light-emitting elements for emitting red light, a plurality of light-emitting elements for emitting green light, and a plurality of light-emitting elements for emitting blue light are arranged. The device can further include a microlens array in which a plurality of micolenses are arranged and an optical modulation panel having a plurality of pixels for red light, a plurality of pixels for green light, a plurality of pixels for blue light, and a plurality of transmissive windows corresponding to the pixels.

Abstract: To provide an optical communication device suitable for the transmission of a high-frequency signal. An optical communication device includes a first substrate having a light-emitting element or a light-receiving element on one side of the first substrate; a second substrate having an electronic circuit to perform operation control of the light-emitting element or the light-receiving element; and a flexible substrate which connects the section between the light-emitting element or the light-receiving element and the electronic circuit while achieving impedance matching.

Abstract: The invention provides an optical transceiver capable of simplifying the manufacturing process. An optical transceiver includes a transparent substrate having a surface emitting laser mounted thereon, a transparent substrate with a photo detector mounted thereon, a transparent substrate formed with diffraction gratings, and a transparent substrate formed with a diffraction grating adhered with each other in layers. The signal beam emitted from the surface emitting laser is introduced to the diffraction grating by the diffraction grating, converged by the diffraction grating, and introduced into the optical fiber connected to the sleeve. The signal beam emitted from the optical fiber connected to the sleeve is introduced toward the diffraction grating by the diffraction grating, converged by the diffraction grating, and introduced into the photo detector.

Abstract: The invention provides a manufacturing method of an optical transceiver whereby the manufacturing process can be further simplified. A method to manufacture an optical transceiver includes: combining an optical socket and an assembling object to be assembled with the optical socket, where the optical socket includes a fitting hole to mount an optical plug holding an end portion of an optical fiber; mounting an optical head to photograph the assembling object in the fitting hole of the optical socket, and obtaining an image of the assembling object exposed to the fitting hole and reference position information in the photographed image display screen; a detecting a difference between the image of the assembling object and the reference position information; reducing the difference by moving the optical socket and the assembling object relative to each other based on the difference; and fixing the assembling object and the optical socket.

Abstract: The invention provides an optical transceiver which makes it possible to simplify a production process. An optical transceiver of the present invention includes an optical socket to mount an optical plug disposed at one end portion of an optical fiber); a light-condensing device; and an optical element to emit light in accordance with a supplied electrical signal and an optical element to generate an electrical signal in accordance with a received light signal; and a light-transmissive substrate to support the optical socket, the light-condensing device, and the optical elements so that the optical fiber, the light-condensing device, and the optical elements are aligned on an optical axis of the optical transceiver.

Abstract: An electro-optical device which includes a plurality of point light sources, a micro-lens array in which a plurality of micro-lenses are disposed, and a light modulation device including a plurality of light-transmissive windows. The electro-optical device is constructed so that, by the micro-lens array, light from the plurality of point light sources is focused at the light-transmissive windows.

Abstract: Provided is a photomask enabling accurate tone representation. This photomask has a transparent substrate (42), and a phase grating structured from a plurality of grooves of a fixed pitch (P) formed on said substrate, wherein at least either the depth or width of the respective grooves of the phase grating is made to bear the exposure pattern. And, when the wavelength of the exposed light of the aligner employing the photomask is set to &lgr;, and the incident side numerical aperture of the imaging system lens is set to NAi, P<&lgr;/NAi. Thereby, the grating will no longer be imaged, and the exposure pattern represented with the depth or width of the respective grooves of the phase grating will be transcribed on to a light sensitive material.

Abstract: Provided is a processing method of a master optical disc with an improved jitter and modulating degree of the reproduced signal, and a fine reading accuracy. In an exposure step for forming one pit by laser beam exposure of a plurality of pulse arrays, using the laser beam for exposure to an optical disc as an intermittent beam, the pulse length of the edges of a pit is made longer than the pulse length of the center portion. Moreover, the pulse interval behind the front edge pulse and/or the pulse interval in front of the rear edge pulse is longer than the pulse interval of the center portion.

Abstract: The present invention provides a pattern drawing device that enables drawing with reduced operational processing loading of the associated CPU. Thus, in a pattern drawing device for forming a plurality of tracks disposed concentrically on a substrate to produce a two-dimensional pattern, a basic pixel sequence is prepared and used repeatedly in forward (positive) and/or reverse (negative) order to produce symmetric portions of the two-dimensional pattern.

Abstract: An object of the present invention is to provide a laser drawing apparatus wherewith it is possible to draw fine patterns at high speed with uniform fineness. In order to achieve that object, in the present invention, drawing is performed at high speed by moving a laser spot in the radial direction while turning a blank disk coated with a photosensitive material mounted on a turntable. A discretionary pattern 203 within a fan-shaped area having the turning center 201 of the blank disk as its center is divided into dots of the same size such as the small areas 209, pattern drawing is performed using such dots as units to be drawn by the laser spot, and the fineness of the pattern shape is enhanced.

Abstract: The present invention provides a manufacturing method capable of obtaining minute structures. In order to achieve this, as shown in FIG. 1, a process target material (108) is exposed and the shape thereof is changed by relatively shifting a laser beam or electronic beam (101) against such process target material (108) and simultaneously repeating irradiation in an intermittent manner. Here, a plurality of minute convex or concave shapes are formed on the process target material (108) by employing a branching element (103) for branching a single beam (108) into a plurality of beams (106, 107); a parallel element (104) for converting said plurality of beams into beams which respectively advance in parallel; and a condensing element (105) for condensing the plurality of beams to the process target material (108) and generating a plurality of minute spots thereon.

Abstract: An electro-optical device which includes a plurality of point light sources, a micro-lens array in which a plurality of micro-lenses are disposed, and a light modulation device including a plurality of light-transmissive windows. The electro-optical device is constructed so that, by the micro-lens array, light from the plurality of point light sources is focused at the light-transmissive windows.

Abstract: An electro-optical device includes: a dot-like light source array in which a plurality of light-emitting elements for emitting red light, a plurality of light-emitting elements for emitting green light, and a plurality of light-emitting elements for emitting blue light are arranged; a microlens array in which a plurality of microlenses are arranged; and an optical modulation panel having a plurality of pixels for red light, a plurality of pixels for green light, a plurality of pixels for blue light, and a plurality of transmissive windows corresponding to the pixels.

Abstract: Prepits in a sector header area are arranged on center lines of groove tracks or land tracks, and header signals are played back in a drive by using sum signals of split sensors, thereby providing resistance to disc tilt or track offset and improving margins.

Abstract: An objective lens actuator including an objective lens holding body for holding an objective lens, and a sheetlike drive coil arranged on an outer circumferential surface of the objective lens holding body. The objective lens holding body is rotatable about a shaft and slidable along the shaft, and a vibration absorbing member is interposed between a portion of the objective lens holding body and the sheetlike drive coil, the portion being opposite to the objective lens with the shaft interposed therebetween.

Abstract: An objective lens drive device includes an objective lens holder, a fixing member, drive coils mounted on one of the objective lens holder and the fixing member; magnets mounted on the other, the magnets positioned in a face-to-face relationship with the drive coils and supplied with an electric current so as to drive the lens holder in both a focusing and a tracking direction, the magnets are magnetized with polarization at least in the focusing direction; and magnetic pieces placed in the magnetic circuits of the magnets relating to a focusing direction, wherein a two-dimensional restoring force is generated in the focusing and tracking directions by the magnetic attraction acting on the magnetic pieces so that the objective lens is held at the neutral point, at least one end portion of the magnetic pieces in the polarizing direction is wider than the middle portion.

Abstract: An optical pickup device operates to irradiate a disk with an optical beam from a light source by an objective lens and to detect the beam reflected from the disk by a light receiving element. A frame is provided for said device having an optical element fixed therein. The frame is formed with a press-fit hole into which the light source is press-fit and fixed so as to adjust the press-fit depth, thereby adjusting alignment between the optical pickup device and the disk.

Abstract: Disclosed is an objective actuator comprising an object lens holder for holding an object lens, the object lens holder being mounted on a support shaft in a manner that the object lens holder is slidable along and rotatable about the support shaft; a drive coil mounted on the object lens holder; first yoke provided with drive magnets, the first yoke being mounted in such manner that the drive magnets confront with the drive coil, the first yoke having a center hole which is larger in diameter than the support shaft, the first yoke and the support shaft are integrally connected by molding; and shaft holding member defined by filling a resin at the center hole of the first yoke, the shaft holding member including a base portion.