Abstract:
The oxygen-permeable hard contact lens of this invention produced by polymerizing in a composition composed of 30 to 50% by weight of an alkyl (meth)acrylate, 10 to 40% by weight of a fluorine-containing monomer, 10 to 35% by weight of a silicone (meth)acrylate, 5 to 15% by weight of an unsaturated carboxylic acid and 0.1 to 15% by weight of a di- or tri(meth)acrylate of a dihydric or higher hydric alcohol by raising a temperature continuously or stepwise from 40.degree. to 100.degree. C. and processing the resulting polymer into a lens shape by ordinary mechanical processing and polishing, is excellent in stain resistance, scratch resistance and hydrophilicity.
Abstract:
Method is disclosed for manufacturing a panel assembly comprised of an inner panel and an outer panel which are welded together at the peripheral portions thereof. The method comprises steps of forming a plurality of raised portions having projections in the inner panel along at least one peripheral portion thereof so that the raised portions project in a direction opposite to the outer panel, folding a peripheral portion of the outer panel over the peripheral portion of the inner panel so that the peripheral portion of the outer panel covers the raised portions in the inner panel, applying anvils to the outer panel at portions corresponding to the raised portions and applying welding electrodes to the peripheral portion of the outer panel which is folded over the raised portions of the inner panel so as to depress the peripheral portion of the outer panel to the raised portion simultaneously applying a welding current in series through at least two of the welding electrodes for welding the peripheral portion of the outer panel to the raised portion of the inner panel. The process is effective to prevent thermal deformations and depression marks on the outer panel.
Abstract:
The present invention relates to a photocathode having a structure to dramatically improve the effective quantum efficiency in comparison with that of a conventional art, an photomultiplier and an electron tube. The photocathode comprises a supporting substrate transmitting or blocking an incident light, a photoelectron emitting layer containing an alkali metal provided on the supporting substrate, and an underlayer provided between the supporting substrate and the photoelectron emitting layer. Particularly, the underlayer contains a beryllium oxide, and is adjusted in its thickness such that a thickness ratio of the underlayer to the photoelectron emitting layer falls within a specific range. This structure allows to obtain a photocathode having a dramatically improved quantum efficiency.
Abstract:
The present invention relates to a photocathode having a structure to dramatically improve the effective quantum efficiency in comparison with that of a conventional art, an photomultiplier and an electron tube. The photocathode comprises a supporting substrate transmitting or blocking an incident light, a photoelectron emitting layer containing an alkali metal provided on the supporting substrate, and an underlayer provided between the supporting substrate and the photoelectron emitting layer. Particularly, the underlayer contains a beryllium oxide, and is adjusted in its thickness such that a thickness ratio of the underlayer to the photoelectron emitting layer falls within a specific range. This structure allows to obtain a photocathode having a dramatically improved quantum efficiency.
Abstract:
A frequency control circuit including a control circuit for setting a set value, an adding circuit for adding the set value per unit time and effecting counting based on the adding result, and a signal output circuit for outputting an alternating signal of a cycle corresponding to the time necessary for the count result by the adding circuit to reach a target value. The control circuit sets the set value as a value which does not correspond to a submultiple of the target value, and the adding circuit starts the counting of a next cycle when the count result reaches the target value. The control circuit further sets an initial value of the counting of the next cycle in accordance with a value of a portion of the adding results, exceeding the target value when the count result reaches the target value.
Abstract:
After a digital content is loaded into an information terminal such as a PC, ID information unique to a viewer or a user of the PC is imprinted into the content. The ID information is imprinted into a predetermined location of the content or alternatively, it may be imprinted over the entire content in the form of a spatial frequency. The content with an ID added thereto is then enabled to be used in the terminal.
Abstract:
A novel tracking control device and method is disclosed. In the tracking control device and method, digital information is reproduced from a recording medium by a reproducing head, an error contained in the reproduced digital information is detected, and the relative position between the recording medium and the reproducing head is controlled by using the detection result. In addition, an arrangement capable of realizing a high tracking capability with respect to the non-linearity of a track is also disclosed. The arrangement forms a plurality of tracking error signals indicative of positional deviations between the reproducing head and a plurality of divided areas into which each track formed on the recording medium is divided, and selectively uses the plurality of tracking error signals.
Abstract:
A frequency processing circuit has a suppressing circuit for suppressing a lower sideband wave of an input FM signal whose frequency is modulated, a frequency conversion circuit for converting the frequency of an output of the suppressing circuit, and an emphasizing circuit for emphasizing a lower sideband wave of an output of the frequency conversion circuit. The emphasizing circuit emphasizes a share of the amount of the wave suppressed by the suppressing circuit.
Abstract:
By providing a mediator for selectively permitting an access request of a first processing circuit for processing a first digital signal to a memory and an access request of a second processing circuit for processing a second digital signal whose bit rate is different from that of the first digital signal to the memory, a process to time-sharing multiplex the first and second digital signals, a process to separate the first and second digital signals from a time-sharing multiplexed signal of the first and second digital signals, and the like are realized while minimizing a scale of hardware.
Abstract:
An apparatus for painting a portion of a two piece shell of a brake booster joined together by a caulking operation. The two pieces are disposed in opposing relationship to each other, and a shear caulking operation is applied to the outer periphery thereof at a plurality of locations, thereby joining the pieces together to define a shell. The shell is held so as to be rotatable about its axis, and a nozzle of a paint applicator is disposed in opposing relationship with the outer periphery of the shell. By rotating the shell through a given angle, paint is applied to successive caulked portions.