摘要:
A grating light valve is provided with a plurality of spaced reflective ribbons, spatially arranged over a semiconductor substrate, the ribbons and substrate being provided with reflective surfaces. The grating light valve is configured to optimize the conditions for constructive and destructive interference with an incident light source having a given wavelength. In a preferred embodiment, one set of ribbons is moveable with respect to the substrate and the second set of ribbons. The substrate is typically provided with a protective layer, which may be thermally grown silicon dioxide or other dielectric. A conductive trace is provided on the dielectric layer and grounded through the dielectric layer to the substrate, comprising a conductive trace for easy release of charge otherwise trapped on or at the dielectric layer.
摘要:
One embodiment disclosed relates to a method for adaptive bipolar operation of a micro electromechanical (MEM) device. The method includes driving the MEM device in a first polarity, determining when an offset passes a first threshold, and switching from the first polarity to a second polarity when the offset passes the first threshold. Another embodiment disclosed relates to an apparatus for adaptive bipolar operation of a MEM device. The apparatus includes a first look-up table (LUT) for use in driving the MEM device in a first polarity, a circuit for determining when an offset passes a first threshold, and a polarity switch for switching from the first polarity to a second polarity when the offset passes the first threshold.
摘要:
A pneumatic tire for improving uneven wear resistance of a tread is provided. A pneumatic tire comprises a carcass serving as a framework and toroidally extending between a pair of bead cores, a belt and a tread disposed on a radially outer side of the carcass, wherein the tread comprises a plurality of tread rubber layers, dynamic elasticity of the outer tread rubber layer located in a radially outermost side of the tire is higher than dynamic elasticity of the inner tread rubber layer located in a radially innermost side of the tire, and a thickness of the inner tread rubber layer in a tire equatorial plane is smaller than a thickness of the inner tread rubber layer in other regions.
摘要:
A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15-0.8 mm in contacting the one of the lateral edges of the photo film. At least one support projection projects from an axially outer face of said flange.
摘要:
A liquid crystal display of improved contrast is provided. Image contrast is determined by the ratio of light from the display pixels that are in an on state to the light from the display pixels that are in an off state. The disclosed system improves on the image contrast by selecting the illumination direction and the panel orientation in such a way as to minimize the amount of light entering the viewing field that is due to scattered and/or diffracted light from the fine features of the display panel.
摘要:
An optical fiber transmission network for transmitting voice, data, or video signals between telecommunication units includes optical couplers which bend an optical fiber at a location in close proximity to the fiber end so as to allow coupling with the fiber through its side rather than through the end of the fiber. This eliminates the need for cleaving and polishing the fiber end, and results in a craft friendly way of terminating an optical fiber end with a telecommunication unit.
摘要:
A dispenser for dispensing an index matching coating material onto an end of an optical fiber to be terminated includes a reservoir formed by a floor and sidewalls with a small portion of the index matching coating material being disposed on a top surface of the floor. An interior perimeter shape of the sidewalls is registrable with an external perimeter shape of an optical fiber contact to which the optical fiber is secured which allows the index matching material to be conveniently disposed on an end of the optical fiber by simply inserting the optical fiber contact into the reservoir.
摘要:
A method for making a dispenser-package for holding a small quantity of fiber-optic coating material and for use in applying same to a fiber optic.The sealant or coating material is introduced into container with a hypodermic needle.
摘要:
A method making high-orientation sheet-like graphite by inserting monomer of high molecular compound between layers of laminar compound such as montmorillonite, polymerizing the monomer, preliminarily carbonizing the thus formed polymer, removing the laminar compound by acid treatment, and effecting graphitization at a high temperature.
摘要:
A heat exchanger and a method of manufacturing a heat exchanger by brazing metal members mainly made of Al or Al alloy is disclosed. The heat exchanger has a plurality of brazed metal members, at least one of the brazed metal members being made of brazing sheet clad with a brazing material. The brazed portions of the metal members or the whole surface of the heat exchanger are coated with a corrosion-resistant fluoride flux consisting essentially of 25-40% KF, 38-54% AlF3 and 3-30% ZnF2 by weight which forms a corrosion-inhibiting metallic film.