摘要:
In manufacturing an optical pickup, an adhesive is applied between an optical waveguide device and a wedge-shaped device fixing member, and an adhesive is applied between the wedge-shaped device fixing member and a stem. After the position of the optical waveguide device is adjusted in three-dimensional directions of an optical axis direction and directions orthogonal to the optical axis by moving the wedge-shaped device fixing member, the optical waveguide device and the wedge-shaped device fixing member are fixed.
摘要:
Disclosed is a polyurethane resin composition for reaction injection molding, which contains an isocyanate component containing at least one of an alicyclic polyisocyanate and an aralkyl polyisocyanate and a trimer of hexamethylene diisocyanate, and a polyol component.
摘要:
Disclosed is an apple tree having a medium vigor, rounded and crenated leaves, exhibiting excellent resistance to Alternaria blotch and bearing a medium size fruit maturing mid-season and having high productivity with an slightly heavy preharvest fruit drop. The fruit has an oblate shape, has yellow colored skin and has excellent storage quality. The flesh of the fruit is yellowish white, juicy and firm, and further, has a strong sweetness and medium sourness, thereby providing a good sweet-sour balance and rich taste, and has an excellent eating quality.
摘要:
A display apparatus of the invention includes: a plurality of display devices arranged in one direction, each of the plurality of display devices having a display area; and a plurality of image transmission means corresponding to the respective display devices, one end face of each of the image transmission means being coupled to a display area of the corresponding one of the display devices, other end faces of the image transmission means corresponding to the adjacent ones of the display devices being in contact with each other, the plurality of image transmission means being bent toward the one direction in which the display devices are arranged. Alternatively, a display apparatus of the invention includes: a plurality of display devices disposed in two directions, each of the plurality of display devices having a display area; a plurality of image transmission means corresponding to the respective display devices, one end face of each of the image transmission means being coupled to a display area of the corresponding one of the display devices, other end faces of the image transmission means corresponding to the adjacent ones of the display devices being in contact with each other, some of the plurality of image transmission means each having inward facing slopes and outward facing slopes on two pairs of opposing faces, the outward facing slopes of the image transmission means being directed to a direction in which the corresponding display device has no adjacent display devices.
摘要:
An optical information reproducing apparatus of the invention includes a light emitting and receiving unit and an optical system. The optical system converges light from the light emitting and receiving unit on a recording medium and converges the light after reflected by the recording medium. The light emitting and receiving unit includes: a semiconductor laser device disposed on a substrate for generating light; a photo detector formed, integrally with the substrate, on the substrate on which the semiconductor laser device is disposed, for outputting a signal corresponding to the intensity of light incident thereon; and a beam splitter provided on an optical axis of the reflected light, the beam splitter leading part of the reflected light to the photo detector.
摘要:
An optical information recording and reproducing device is provided. The device includes a light source for emitting a light beam, a first diffraction element for splitting the light beam into at least three diffracted beams, an optical system guiding the diffracted beams to a recording medium, and a second diffraction element including at least one division line and a diffraction surface from which the diffracted beams are diffracted. The diffraction surface is divided into at least two regions by the division line or lines. One of the division lines is at a predetermined angle against the direction of a track on the recording medium, and the regions split each of the diffracted beams into at least two parts to diffract the parts in different directions. The device also includes an optical detecting element for detecting the light beams diffracted with the second diffraction element.
摘要:
An optical device includes: a first dielectric slab waveguide having an effective refractive index N.sub.1 ; a second dielectric slab waveguide having an effective refractive index N.sub.2 ; and a third dielectric slab waveguide having a length 1 and an effective refractive index N.sub.3, the third dielectric slab waveguide being formed between the first dielectric slab waveguide and the second dielectric slab waveguide so as to connect the first dielectric slab waveguide with the second dielectric slab waveguides optically; wherein the length I and the effective refractive index N.sub.3 substantially satisfy following equations; ##EQU1## where .lambda. is a free-space wavelength of light traveling in the optical device and the light travels from the first dielectric slab waveguide to the third dielectric slab waveguide at an incident angle .THETA. in a single mode.
摘要:
Proposed is a box container suitable for holding and transporting a plural number of sheet-like bodies such as lead frames for semiconductor devices such as ICs. The box container consists of three parts including (a) an inner box member to hold the sheet bodies, (b) a box tray member into which the inner box member is inserted and (c) a covering member to be engaged with the box tray member. The inner box member is an integral plastic body consisting of a generally rectangular base plate and side plates each connected, independently from the others, at the bottom line to one of the four sides of the base plate while each of the side plates is jointed to the base plate not perpendicularly but with outward inclination from the bottom to the upper periphery in such a resiliently bendable fashion that, when the inner box member is inserted into the box tray member, each side plate is contacted with the side wall of the box tray member with resilience to take a perpendicular disposition to ensure little play between the side plates and the sheet bodies therein while good working efficiency is ensured in putting and taking sheet bodies into and out of the inner box member.
摘要:
An optical pickup apparatus including a light emitting source, a hologram element for scanning a recording medium with light beams emitted from the light emitting source, a hologram lens for focusing the light beams introduced from the hologram element on the recording medium, an optical detector for detecting the light beams reflected from the recording medium, and a first optical system for directing the light beams reflected from the recording medium to the optical detector. The hologram element includes an optical diffraction grating for diffracting the light beams emitted from the light emitting source and a control means for controlling the rotation of the hologram element in a swinging manner. The hologram element can have hologram gratings on both surfaces thereof; one of them has a pattern of straight lines and the other has a pattern of concentric circles to obtain a widened deflection angle.
摘要:
An optical diffraction grating element comprising diffraction gratings having a configuration in which grooves and flat lands each positioned between the adjacent grooves are successively alternately formed, wherein the diffraction gratings have the same groove depth, groove width and groove tilt angle in order to obtain a constant 0th-order diffraction efficiency and first-order diffraction efficiency in the optical diffraction grating element while the pitches of the diffraction gratings are made different by setting a different land width for each diffraction grating.