Abstract: There is provided a filter for an optical recording medium, including: a plurality of high refractive index layers, and a plurality of low refractive index layers, wherein the high refractive index layers and the low refractive index layers are alternately deposited, the total number of the high refractive index layers and the low refractive index layers deposited is an even number in the range of 10 to 20, and the high refractive index layers and the low refractive index layers are different in thickness from one another. Also, there is provided an optical recording medium using the filter for an optical recording medium.

Abstract: The present invention provides a filter for optical recording medium capable of preventing diffuse reflection of an information beam and a reference beam from a reflective layer in the optical recording medium and preventing occurrence of noise without causing shift in selective reflection wavelength, and distortion in a reproduced image even when an angle of incidence is changed, and an optical recording medium capable of recording a high density image by using the filter. Specifically, the present invention relates to the optical recording medium containing a first substrate, a recording layer which records information by utilizing holography, an optical compensation layer, a filter layer, and a second substrate, in this order, and the filter layer is a cholesteric liquid crystal layer.

Abstract: The present invention provides glass containing a base, and an optical film, wherein the optical film contains a vertically polarizing film having a polarizer whose absorption axis is substantially vertically oriented to a film surface, and a ?/2 optical rotation film containing an optical rotator for rotating a vibration direction of linearly polarized light by substantially 90 degrees.

Abstract: To provide a polarizing plate including a polarizing layer containing anisotropic metal nanoparticles produced by reducing a metal ion in a liquid crystal matrix. An embodiment in which the liquid crystal matrix is characterized in that molecules of a liquid crystal compound are fixed in an alignment state of any one of substantially horizontal alignment, substantially vertical alignment, diagonal alignment, hybrid alignment and spiral alignment; an embodiment in which the reduction is at least one of photoreduction, thermal reduction and chemical reduction; and the like are favorable.

Abstract: Disclosed is an optical compensatory sheet which comprises a layer in the condition of a mono-domain of discotic nematic phase or a monoaxial columnar phase. Further, a process for preparation of the optical compensatory sheet and a liquid crystal display provided with the optical compensatory sheet are disclosed.

Abstract: Disclosed is a liquid crystal display provided with an optical compensatory sheet consisting essentially of a transparent support and a layer prepared from a discotic liquid crystal of a low molecular weight, or an optical compensatory sheet which has the minimum of absolute values of retardation values in a direction inclined from the normal of the sheet and has no optic axis.

Abstract: Disclosed are a liquid crystal display provided with an optical compensatory sheet comprising an optically anisotropic layer which has negative birefringence and comprises a polymer having a discotic structure in its molecule, and an optical compensatory sheet which comprises a transparent support, an orientation layer provided thereon and the optically anisotropic layer provided on the orientation layer. Further, a process for preparation of the optical compensatory sheet and a liquid crystal composition which is useful as material for preparing the optical compensatory sheet are also disclosed.

Abstract: Disclosed is an optical compensatory sheet which comprises a transparent support and an optically anisotropic layer provided thereon, wherein the optically anisotropic layer comprises a compound having a discotic structure unit in its molecule and has negative birefringence, and the discotic structure unit has a plane inclined from a plane of the transparent support at an angle varying along a direction of depth of the anisotropic layer. A liquid crystal display and a color liquid crystal display provided with the optical compensatory sheet are also disclosed.

Abstract: A magnetic recording medium comprising a non-magnetic support having on at least one side thereof at least one magnetic layer, in which the magnetic layer comprises a binder having dispersed therein a ferromagnetic powder and the non-magnetic support has a coarse projection density of not more than 400 per 500 mm.sup.2, a surface roughness (Ra) of from 0.02 to 0.07 .mu.m (cut-off value: 0.25 mm), and a thermal shrinkage of not more than 1.0% when preserved at 100.degree. C. for 4 hours. The magnetic recording medium has satisfactory sensitivity and frequency characteristics, freedom from output variation in the high-frequency region, and excellent running properties at ordinarily temperature and ordinary humidity with a reduced rate of running stop.

Abstract: A method of making a substrate for a magnetic recording medium comprises the steps of applying a radiation-polymerizable compound at least to one surface of a base sheet, closely contacting a surface of a transfer member with a surface of a coating layer thus formed of the radiation-polymerizable compound, exposing the coating layer to a radiation from the side of the base sheet or the transfer member, whichever is permeable to the radiation, and separating the transfer member form the surface of the coating layer. The surface of the transfer member is adjusted so that the arithmetical mean deviation at a cut-off value of 0.25 mm and at a measuring length of 80 mm is within the range of 0.001 .mu.m to 0.050 .mu.m, and the ratio of the maximum height at a cut-off value of 0.25 mm and at a measuring length of 20 mm to the arithmetical mean deviation is within the range of 5:1 to 20:1.

Abstract: Magnetic recording medium is disclosed which comprises a non-magnetic support having coated thereon a magnetic layer mainly containing ferromagnetic metal particles and a binder:(1) wherein the non-magnetic support is a polyester film having a thickness of 4 to 12 .mu.m, (b) an F5 value in a machine direction of 16 kg/mm.sup.2 or more, (c) a breaking strength in a machine direction of 25 kg/mm.sup.2 or more, (d) a breaking elongation in a machine direction of 90% or less, (e) a surface roughness (Ra) of 0.01 to 0.03 .mu.m, and (f) a fish eye (FE), which is shown in terms of height (H), of 6H or more having 0 per 100 cm.sup.2, a fish eye of 5H having 2 or less per 100 cm.sup.2 and a fish eye of 4H having 5 or less per 100 cm.sup.2 ;(2) wherein the ferromagnetic metal particles have (a) a saturation magnetization (.sigma.s) of 110 to 160 emu/g, and (b) a specific surface area measured by the BET method of 25 to 65 m.sup.

Abstract: A magnetic recording medium is described, comprising a nonmagnetic support, a magnetic layer, and a nonmagnetic intermediate layer provided between the support and the magnetic layer, the nonmagnetic intermediate layer containing a radiation-polymerizable compound and finely divided particles, the nonmagnetic intermediate layer being polymerized by irradiation and having a surface roughness from about 0.001 to 0.02 .mu.m. This medium provides reduced gap loss between the medium and a magnetic head, and is suitable for use in high density recording.