摘要:
An optical scanning device includes a diffractive optical element. The diffractive optical element is a hybrid lens in which a resin layer is joined to a glass-lens base material, and a diffractive surface is provided in the resin layer. The diffractive surface has a multi-step structure including a plurality of zonal surfaces and a plurality of step surfaces.
摘要:
A semiconductor wafer inspection apparatus for inspecting an outer circumference edge part of a semiconductor wafer. The apparatus has a camera lens arranged facing an outer circumference edge part of a semiconductor wafer, an imaging surface arranged facing an outer circumference end face of a semiconductor wafer via the camera lens, a mirror forming an image of a first outer circumference bevel surface of the semiconductor wafer on the imaging surface via the camera lens, a mirror forming an image of a second outer circumference bevel surface of the semiconductor wafer on the imaging surface via the camera lens, a correction lens forming an image of an outer circumference end face of the semiconductor wafer on the imaging surface via the center part of the camera lens, and an illumination light guide lamp part illuminating the surfaces. With use of the apparatus the first outer circumference bevel surface and second outer circumference bevel surface become brighter compared with the outer circumference end face.
摘要:
Keyboard apparatus includes: a key supported for pivoting movement about a pivot point; a mass member for imparting a reaction force to performance operation of the key in interlocked relation to the key; a transmission member provided in abutment with both of the key and mass member to transmit a load from one of the key and mass member to the other; and an electromagnetic actuator for driving, via a fixed coil, the transmission member toward at least one of the key and mass member. Good key touch feeling can be achieved not only by a load applied from the mass member to the key but also through load control by the actuator. Thus, it is possible to faithfully reproduce a key touch feeling approximate to that in a natural keyboard instrument, such as an acoustic piano, with a simple construction and facilitated control.
摘要:
An optical scan apparatus which deflects a plurality of light beams to scan a write region on a scan surface in a main scan direction is configured to include a light source which has a plurality of emission portions emitting the plurality of light beams arranged two-dimensionally on a plane in parallel to the main scan direction and a sub scan direction perpendicular to the main scan direction; a deflector which deflects the plurality of light beams from the plurality of emission portions; a light receiving element which receives the light beams and outputs a synchronous detection signal in accordance with the received light beams; and a control unit which selectively controls any one of the emission portions to emit a light beam upon each scanning and allows the light beam from the selected emission portion to be incident on the light receiving element via the deflector.
摘要:
P-polarized light beam passing through an fθ lens passes through a polarization beam splitter, is converted into S-polarized light beam by a quarter-wave plate and a reflecting mirror, re-enters the polarization beam splitter, and is reflected at the polarization beam splitter in the −Z direction. An optical path of a light beam between a polygon mirror and the fθ lens, between the fθ lens and the polarization beam splitter, between the polarization beam splitter and the quarter-wave plate, between the quarter-wave plate and a reflecting mirror, between the reflecting mirror and the quarter-wave plate, and between the quarter-wave plate and the polarization beam splitter are in the same plane.
摘要:
A linear actuator which can make a bed flat in emergency. A linear actuator (10) comprising a shaft (16) having an externally threaded portion (17), a worm reduction gear for transmitting rotation of a motor (40) to the shaft (16), a nut (19) screwing on the externally threaded portion (17) and advancing or retreating as the shaft (16) rotates forward or reversely, and a moving tube (12) secured to the nut (19) and advancing or retreating for the housing (11) is further provided with a sub-shaft (52) interlocked with the worm reduction gear, an inner race (59) spline coupled with the sub-shaft (52), an engaging male portion (82) and an engaging female portion (83) interposed between the inner race (59) and the collar (55) of the shaft (16) to engage freely with each other, an operating ring (66) fitted rotatably to the outer circumference of the housing (11), and a working ring (72) for transmitting the rotation of the operating ring (66) to the inner race (59) while converting into axial movement. The shaft (16) can be rotated freely in emergency by disengaging the engaging male portion and the engaging female portion.
摘要:
First, an inner tube member is accommodated in an outer tube member. Then, rigid powder, having high rigidity and a hard-to-magnetize characteristic, into the inner tube member. Next, magnetic powder is filled into a recessed portion of the inner tube member. Then, the inner tube member is drawn out of the outer tube member. Then, a composite filler composed of the rigid powder, magnetic powder and outer tube member is subjected to a cold hydrostatic pressure pressing process as pre-processing. Next, the composite filler is heated and solidified into a billet. Then, the billet is subjected to a hot extrusion process so that it is formed into a bar-shaped workpiece. The bar-shaped workpiece is rolled onto a roller, and then the outer tube member is peeled off. Next, the bar-shaped workpiece is subjected to a cutting process so that it is formed into an elongated bar. Then, a magnetic section of the elongated bar is magnetized into a scale structure.
摘要:
A common photodetecting unit detects a plurality of beams scanned by a plurality of polyhedral reflection mirrors provided in a multiple stages with a common rotation axis, and generates a synchronization detection signal based on detected beams. The reflection mirrors make a predetermined angle θ1 in a direction of rotation of the reflection mirrors. When time between two consecutive synchronization detection signals on a time line generated by the common photodetecting unit is ti, where i is a positive integer equal to or smaller than number of split beams, at least one of ti is different from others.
摘要:
A vehicle A.C. generator has a rotor. The rotor has a pair of pole cores and magnet holders. Each pole core has a plurality of claw-like magnet poles. Each magnet holder contains a permanent magnet and placed between the adjacent claw-like magnet poles in order to prevent leakage flux. The rotor has a pair of supporting members in order to stop each magnet holder shifting in the direction of a rotary shaft of the rotor. Each supporting member has projecting parts which correspond to the magnet holders. The supporting members are fixed to one end surface of the pole cores, respectively. Each projecting part fixes the position of the corresponding permanent magnet in the rotor.
摘要:
An image pickup device disposed in a predetermined position relative to a surface of a strained silicon wafer photographs the surface of the strained silicon wafer in a plurality of rotation angle positions on photographing conditions under which bright lines appearing on the surface of the strained silicon wafer can be photographed, in an environment where a light source device illuminates the surface of the strained silicon wafer which is rotating. A composite image in a predetermined angle position is generated from surface images of the strained silicon wafer in a plurality of rotation angle positions obtained by the image pickup device.