Abstract: An apparatus is presented for extracting configurational features of an object formed by a number of surfaces with a two-dimensional laser pattern. Changes in the shape can be tracked, and speedy three-dimensional measurements are made possible in a small memory area without requiring parameter adjustment. The device comprises a two-dimensional laser pattern generating device 61 which projects laser light in a desired two-dimensional pattern configuration, a three-dimensional position calculating device 62 which synchronizes the timing of the laser light illumination with the timing of the detection of two-dimensional points. Three-dimensional coordinates of a surface point are rapidly calculated, then the surface parameters are determined by the three-dimensional positions of a number of points (three points or more).

Abstract: An apparatus is presented for extracting configurational features of an object formed by a number of surfaces with a two-dimensional laser pattern. Changes in the shape can be tracked, and speedy three-dimensional measurements are made possible in a small memory area without requiring parameter adjustment. The device comprises a two-dimensional laser pattern generating device which projects laser light in a desired two-dimensional pattern configuration, a three-dimensional position calculating device which synchronizes the timing of the laser light illumination with the timing of the detection of two-dimensional points. Three-dimensional coordinates of a surface point are rapidly calculated, then the surface parameters are determined by the three-dimensional positions of a number of points (three points or more).

Abstract: A semiconductor laser apparatus includes a semiconductor substrate, a first cladding layer, an active layer, a second cladding layer, a second electrode, and a pair of resonator mirrors. The semiconductor substrate has a first electrode on one surface. The first cladding layer is formed on the other surface of the semiconductor substrate. The active layer is placed on the cladding layer. The second cladding layer is placed on the active layer. The second electrode is placed on the second cladding layer. The pair of resonator mirrors are placed in a waveguide direction perpendicular to the surfaces of the semiconductor substrate to oppose each other. The active layer is constituted by a quantum well layer having a tensilely strain. The second electrode is separated into portions not less than two portions.

Abstract: A semiconductor laser apparatus includes a semiconductor substrate, a first cladding layer, an active layer, a second cladding layer, a second electrode, and a pair of resonator mirrors. The semiconductor substrate has a first electrode on one surface. The first cladding layer is formed on the other surface of the semiconductor substrate. The active layer is placed on the cladding layer. The second cladding layer is placed on the active layer. The second electrode is placed on the second cladding layer. The pair of resonator mirrors are placed in a waveguide direction perpendicular to the surfaces of the semiconductor substrate to oppose each other. The active layer is constituted by a quantum well layer having a tensilely strain. The second electrode is separated into portions not less than two portions.

Abstract: An optical head for use with an optical disk has a unit packaging an optical path conversion device for converting a light beam path from substantially in parallel to the surface of a rotating optical disk into a direction substantially perpendicular to the surface of the optical disk, a lens system for focusing the light beam onto the recording surface of the optical disk, and a focus controlling mechanism for adjusting the focus of the lens system. A head outer shell supports the unit by one or more diaphragms for movement of the unit in the parallel direction of the optical path. A track control mechanism which includes an electromagnetic actuator adjusts the positional relation of the unit relative to outer shell in that parallel direction without causing unit movement in the perpendicular direction.

Abstract: A small-sized video or audio reading pickup device in which a light beam generator generates a light beam directed to a focussing device which focuses the light beam into a beam spot on an information carrier. The focussing device is mounted on an upper portion of a cylindrical hollow support disposed in a resiliently supported frame and a beam deflecting mirror is fixedly mounted within the cylindrical hollow support and independently thereof in vertical alignment with the focussing device. A light beam generated by the beam generating device is laterally directed to and deflected off the deflecting mirror and focused via the focussing device onto the information carrier, with the vertical positioning of the cylindrical hollow support being controlled to control the size of the beam spot. Lateral positioning of the light beam on the carrier is also controlled by lateral translation of the frame, and a photo-sensitive detector is arranged to detect light beam intensity reflected from the carrier.