Abstract:
A colorless antireflection film excellent in productivity and high in transparency, and an antireflection layer-affixed plastic substrate. An antireflection film and an antireflection layer-affixed plastic substrate having moisture-proofing and gas-barrier properties and being excellent in optical characteristics. An antireflection film comprising a hard coat layer formed on a substrate, and a transparent, high-refractive-index oxide layer and a transparent, low-refractive-index oxide layer alternately laminated on the hard coat layer. The transparent, high-refractive-index oxide layer is compose of a Nb2O5 layer formed by a reactive sputtering method. An antireflection film using a substrate consisting of an organic material, wherein an inorganic, moisture-proofing layer having a refractive index approximate to that of the organic material is formed in contact with one surface of the substrate.
Abstract translation:生产率优异,透明性高的无色防反射膜,以及防反射层贴合塑料基板。 具有防湿和气体阻隔性并且光学特性优异的防反射膜和防反射层的塑料基板。 一种防反射膜,其特征在于,在基材上形成有硬涂层,在该硬涂层上交替层叠透明的高折射率氧化物层和透明低折射率氧化物层。 透明的高折射率氧化物层由通过反应溅射法形成的Nb 2 O 5层构成。 一种使用由有机材料构成的基板的防反射膜,其中,与基板的一面接触而形成折射率接近有机材料的无机防湿层。
Abstract:
In an edge detection method, a tightest data portion for forming a tightest pit pattern therein is provided in an area in the front of an effective data portion where an information pit pattern is formed, and the threshold voltage is established on the basis of the tightest pit pattern formed in the tightest data portion.
Abstract:
An optical disc adapted so that concentrical or spiral guide grooves are formed at a base and emboss shaped pits are molded between these respective guide grooves is disclosed. In this optical disc, depth of pit is set so that the push-pull signal by the pits is caused to have reverse polarity with respect to the push-pull signal by the guide grooves. For example, when wavelength of reproduction laser beams is lambda , refractive index of the base is n, and track pitch is t, the depth Dp of the pit is set so as to fall within the range expressed as 0.32 lambda /n ≤ Dp ≤ 0.51 lambda /n, the width Wp of the pit is set so as to fall within the range expressed as 0.27 t ≤ Wp ≤ 0.36 t, and the depth Dg and the width Wg of the guide groove are respectively set so as to fall within the ranges expressed as 0.0875 lambda /n ≤ Dg ≤ 0.1625 lambda /n and expressed as 0.27 t ≤ Wg ≤ 0.36 t.
Abstract:
A fine particle dispersion composition comprises metal-oxide fine particles; an organic resin material adapted to cure by absorbing energy; one of polyoxyethylene alkyl ether phosphoric acid-based surfactant and a polyoxyethylene alkyl ether carboxylic acid-based surfactant (each having molecular weight of >= 500); and an organic solvent. The composition becomes an optical component when cured. Independent claims are included for the following: (1) an optical film laminate having several stacked optical films that differ in refractive index from one another. The optical film is obtained by curing the fine particle dispersion; (2) a polarization splitting device having a transparent base member having inclined plane surfaces formed in it by grooving, the inclined plane surfaces differing in inclination direction from each other. The inclined plane surfaces has a polarization splitting multilayer film formed on it. The transparent base member and/or the polarization splitting multilayer film is obtained by curing the fine particle dispersion composition; and (3) preparation of optical component involving performing dispersion treatment on metal-oxide fine particles, an organic resin material adapted to cure by absorbing energy; one of polyoxyethylene alkyl ether phosphoric acid-based surfactant and a polyoxyethylene alkyl ether carboxylic acid-based surfactant (each having molecular weight of >=500) in organic solvent together with high hardness metallic balls or ceramic balls; subsequently applying dispersion solution and evaporating the organic solvent.
Abstract:
In an edge detection method, a tightest data portion for forming a tightest pit pattern therein is provided in an area in the front of an effective data portion where an information pit pattern is formed, and the threshold voltage is established on the basis of the tightest pit pattern formed in the tightest data portion.
Abstract:
An optical disk that has a structure wherein concentric or spiral guide grooves are made in a substrate and emboss-like pits are made between these guide grooves. The depth of the pits is such that a push-pull signal by the pits has an opposite polarity to that of a push-pull signal by the guide grooves. For example, the depth Dp of the pits, the width Wp of the pits and the depth Dg and the width Wg of the grooves are in the ranges expressed by 0.32 lambda /n
Abstract translation:一种光盘,它具有在基片上制作同心或螺旋导槽并在这些导槽之间形成浮凸状凹坑的结构。 凹坑的深度使得凹坑的推挽信号具有与导槽的推挽信号相反的极性。 例如,凹坑的深度Dp,凹坑的宽度Wp以及凹槽的深度Dg和宽度Wg处于0.32λ/n=Dp=0.51λ/ n,0.27 t = Wp =0.36t,0.0875λ/n=Dg=0.1625λ/n和0.27t≤wg≤0.36t,其中λ是再现激光束的波长 ,n是基板的折射率,t是轨道的间距。
Abstract:
The present invention provides an optical disc of the land/groove method having equivalent optical characteristics for the land and the groove, serving as an optimal optical disc for the land/groove recording. A groove formed on a substrate 2 has a greater value than a width of a land of the substrate 2. The groove formed on the substrate 2 has an average width Wg defined by the following Equation (1). 0.46Tp + 2 DELTA ≤ Wg ≤ 0.54Tp + 2 DELTA (1> wherein DELTA = (Tg-To) /tan&thetas;; Tg represents a film thickness of the recording layer formed on a slanting portion of said groove formed on said substrate; To represents a film thickness of said recording layer formed on a flat portion of said groove formed on said substrate; &thetas; represents an angle defined by said slanting portion and said flat portion of said groove formed on said substrate; and Tp represents a sum of the average width Wg of said groove and the average width Wl of said land formed on said substrate.
Abstract:
In an edge detection method, a tightest data portion for forming a tightest pit pattern therein is provided in an area in the front of an effective data portion where an information pit pattern is formed, and the threshold voltage is established on the basis of the tightest pit pattern formed in the tightest data portion.
Abstract:
In an edge detection method, a tightest data portion for forming a tightest pit pattern therein is provided in an area in the front of an effective data portion where an information pit pattern is formed, and the threshold voltage is established on the basis of the tightest pit pattern formed in the tightest data portion.
Abstract:
In an edge detection method, a tightest data portion for forming a tightest pit pattern therein is provided in an area in the front of an effective data portion where an information pit pattern is formed, and the threshold voltage is established on the basis of the tightest pit pattern formed in the tightest data portion.