摘要:
An objective of the present invention is to enhance reliability of recorded data by preventing deterioration of OPC (Optimum Power Calibration) accuracy due to an influence of inter-layer interference in an optical disk device capable of writing in a multilayer optical disk. Aiming at the objective, a relationship between asymmetry and a signal modulation depth, which are measured by use of a standard driver is referred, and thereby an offset caused by a device, a disk, a writing state of another layer and the like is compensated. Thus, OPC is executed.
摘要:
An objective of the present invention is to enhance reliability of recorded data by preventing deterioration of OPC (Optimum Power Calibration) accuracy due to an influence of inter-layer interference in an optical disk device capable of writing in a multilayer optical disk. Aiming at the objective, a relationship between asymmetry and a signal modulation depth, which are measured by use of a standard driver is referred, and thereby an offset caused by a device, a disk, a writing state of another layer and the like is compensated. Thus, OPC is executed.
摘要:
According to the present invention, an optimum value of a laser power for recording data on a high-density optical disk can be set with high accuracy. A test signal whose erase power Pe is fixed and recording power Pw is varied is recorded on the optical disk. The recorded signal is reproduced and a β value representing asymmetry of the reproduced signal is obtained for each recording power. An optimum recording power Pwo is set from a recording power with which the obtained β value becomes a target β value. Hereby, the fixed erase power Pe is determined from measurement results of a value of a modulation factor M of another test signal recorded. Alternatively, the fixed erase power Pe follows strategy information defined in advance for the optical disk. Or Pe≈0 is used regardless of the optical disk.
摘要:
A surveillance camera apparatus includes a first storage unit for storing a size of pixels configuring a image-sensor, a computation unit for performing a computation using first information, second information, third information, and fourth information to calculate angle information on a plurality of vertex-points, the information stored in the first storage unit being defined as the first information, a focal length of an optical lens being defined as the second information, angle information on an optical axis that passes through a rotation center of the surveillance camera apparatus as the third information, and pixel information corresponding to a plurality of vertex-points that form a region to be masked whose image has been picked up by the image-sensor being defined as the fourth information, and a second storage unit for storing the computation result by the computation unit.
摘要:
This invention relates to a coated cutting tool suitable for high speed cutting working and a process for the production of the same. The feature of the present invention consists in a coated cutting tool comprising a coating layer consisting of an inner layer and outer layer on a surface of a substrate consisting of a cemented carbide such as tungsten carbide-based cemented carbide, etc., the inner layer being composed of a mono-layer of titanium carbonitride in contact with the substrate, a double layer of titanium nitride of 0.1 to 2 .mu.m in thickness, in contact with the substrate, and titanium carbonitride directly above it or a multi-layer provided thereon consisting of titanium carbide, etc., in which the chlorine content in the inner layer is at most 0.05 atom % on average throughout the inner layer, the ratio of the peak intensities of the specified planes in the X-ray diffraction of the above described titanium carbonitride in the specified range and as the inner layer, there are provided coating layers consisting of a first layer of titanium nitride in contact with the substrate and a second layer having a hardness of 160 to 2400 kg/mm.sup.2, and a process for the production of the same. The coated cutting tool of the present invention exhibits a high wear resistance of the coating itself, tenacious adhesiveness of the coating film and substrate and excellent stripping resistance during cutting.
摘要:
A super hard metal roll assembly and a process for producing it are disclosed. Initially, a powdered mix of super hard metal materials is moulded into a hollow cylindrical moulding. The moulding is then fitted about a super hard metal cylindrical element such as roll, cylinder, pillar or shaft, and sintered to contract to a bushing tightly engaging the outer periphery of the cylindrical element to produce a super hard metal roll assembly. The roll assembly may be further treated in a high temperature and high pressure inert gas in order to eliminate voids at the interface between the bushing and the cylindrical element.
摘要:
In an optical disk apparatus and a method for determining the recording power for the same, for determining the optimum value of a laser power when recording data onto a high density optical disk, a test signal is recorded with changing the recording power Pw while fixing an erasing power Pe. Reproduction is made on the signal recorded so as to obtain a “β” value indicative of asymmetry of the reproduction signal to each the recording power. In this instance, the “β” value, or the optimal recording power Pwo is determined, with utilizing an area or region, being called APC region, which is provided in a part of the recording regions, which are divided into a large number thereof, each being made of a predetermined information recording unit (RUB), being unique to that disk, and further equalization thereof. Herein, the erasing power Pe to be fixed is determined from a result of measurement on a modulation factor, “M” value while recoding another test signal. Or, it may be determined in accordance with strategy information, which is determined for that optical disk in advance. Or, the erasing power Pe may be determined Pe0, irrespective of the optical disks.
摘要翻译:在用于确定其记录功率的光盘装置和方法中,为了在将数据记录到高密度光盘上时确定激光功率的最佳值,在修改记录功率Pw的同时记录测试信号 擦除电力Pe。 对所记录的信号进行再现,以获得指示再现信号对每个记录功率的不对称性的“β”值。 在这种情况下,使用被称为APC区域的区域或区域来确定“β”值或最佳记录功率Pwo,该区域或区域被设置在记录区域的一部分中,被分成大量 每个由预定的信息记录单元(RUB)制成,对于该盘是唯一的,并且进一步的均衡。 这里,从重新编码另一测试信号的调制因子“M”值的测量结果确定要固定的擦除功率Pe。 或者,可以根据预先为该光盘确定的策略信息来确定。 或者,可以确定擦除功率Pe Pe 0,与光盘无关。
摘要:
Tungsten powder which is a material of high radiation absorptivity is dispersed into unvulcanized fluoro rubber in advance so that the mixture is vulcanized and molded. As the powder of material of high radiation absorptivity, powder having an F.s.s.s. particle size not larger than 50 .mu.m is used. Further, in the case where a mixture of powder having an F.s.s.s. particle size in a range of from 5 .mu.m to 50 .mu.m, and powder having an F.s.s.s. particle size in a range of from 0.5 .mu.m, to 5 .mu.m, is used as the powder of material of high radiation absorptivity, the powder of material of high radiation absorptivity has good tensile strength, good extensibility and more excellent radiation shielding ability, when the weight of the powder having a particle size in a range of from 4 .mu.m to 100 .mu.m is in a range of from 60% by weight to 95% by weight, and the weight of the powder having a particle size smaller than 4 .mu.m is in a range of from 5% by weight to 40% by weight. Both the powder and the vulcanized rubber containing carbon powder have electrical conductivity, so that electromagnetic wave shielding ability is added. In addition, the vulcanized rubber is vulcanized fluoro rubber which is excellent in heat resistance and chemical resistance.
摘要:
A process for producing a cutting tool having a rake face and flank face which intersect to form a cutting edge, which cutting tool comprises a substrate consisting of a sintered hard metal and a coating film provided thereon consisting of a material with a higher hardness than the substrate, which method involves subjecting the substrate to a coating treatment and honing treatment in such a manner that the coating film near the cutting edge has such a thickness that the thickness continuously increases in directions away from the cutting edge along both the rake face and the flank face from a minimum value, including zero, at the cutting edge, such that the thickness of the coating at the rake face reaches a maximum thickness at a first distance from the cutting edge and the thickness at the flank face reaches a maximum thickness at a second distance from the cutting edge, wherein the first distance is greater than the second distance.
摘要:
A coated cemented carbide member includes a cemented carbide base material containing a binder metal of at least one iron family metal and a hard phase, and a coating layer provided on the surface of the cemented carbide base material. The hard phase contains at least one metal component selected from carbides, nitrides, carbo-nitrides and carbonic nitrides of Zr and/or Hf and WC. A layer consisting of only WC and an iron family metal or a binder phase enriched layer or a low hardness layer is provided on an outermost surface of each insert edge portion of the cemented carbide base material. The coating layer is a single or multiple layer consisting of at least one metal component selected from carbides, nitrides, carbo-nitrides, oxides and borides of metals belonging to the groups IVB, VB and VIB of the periodic table. Due to this structure, it is possible to improve chipping resistance with no deterioration of wear resistance in the coated cemented carbide member to be used, for example, as a cutting tool.