摘要:
In accordance with the invention a new optical data carrier and methods for its production are provided. The optical data carrier of the invention is characterized in that different plates have different concentrations.
摘要:
In accordance with the invention a new optical data carrier and methods for its production are provided. The optical data carrier of the invention is characterized in that different plates have different concentrations.
摘要:
Optical storage medium from which information can be read out and/or into which information can be recorded with a light beam (6), said optical storage medium comprising one or more base members (1) bearing on the side of the base members (1) on which the light beam (6) is incident, one or more information storage layers (3), at least one light-transmissive cover film (5) and one or more light-transmissive adhesive layers (4) bonding said cover films (5) to each other, to the surface (2) of the base members (1) on which the light beam (6) is incident and/or to one or more information storage layers (3), said cover films (5) being extruded and exhibiting a vertical birefringence of less than 0.001 at 20 DEG C at least at the wavelength or wavelength spectrum, respectively, of said light beam (6).
摘要:
A dye-in-polymer composition for use in fluorescent WORM discs comprises about 0.1 to 10% by weight of a fluorescent dye capable of absorbing laser radiation and transforming the absorbed light into heat; about 10 to 80% by weight of nitrocellulose and a film forming polymer. The dye containing solution is applied to a substrate of an optical reading medium by a spin, roller or dip coating. The method utilizes a focused laser beam for scanning the recording layer.
摘要:
Optical storage medium from which information can be read out and/or into which information can be recorded with a light beam (6), said optical storage medium comprising one or more base members (1) bearing on the side of the base members (1) on which the light beam (6) is incident, one or more information storage layers (3), at least one light-transmissive cover film (5) and one or more light-transmissive adhesive layers (4) bonding said cover films (5) to each other, to the surface (2) of the base members (1) on which the light beam (6) is incident and/or to one or more information storage layers (3), said cover films (5) being extruded and exhibiting a vertical birefringence of less than 0.001 at 20 DEG C at least at the wavelength or wavelength spectrum, respectively, of said light beam (6).
摘要:
The invention refers to an optical storage medium from which information can be read out and/or into which information can be recorded with a light beam (6), said optical storage medium comprising one or more base members (1) bearing on the side of the base members (1) on which the light beam (6) is incident, one or more information storage layers (3), at least one light-transmissive cover film (5) and one or more light-transmissive adhesive layers (4) bonding said cover films (5) to each other, to the surface (2) of the base members (1) on which the light beam (6) is incident and/or to one or more information storage layers (3), at least one of said adhesive layers being obtained by applying a curable liquid precursor of said adhesive with subsequent curing, said cover films (5) exhibiting a vertical birefringence of less than 0.001 at 20 DEG C at least at the wavelength or wavelength spectrum, respectively, of said light beam (6).
摘要:
A photocurable resin composition which comprises: (A) a urethane (meth)acrylate oligomer obtained by the reaction of (a) at least one polyol compound preferably selected from the group consisting of polyester polyols and polycarbonate polyols, (b) a polyisocyanate compound, and (c) a hydroxyl group-containing (meth)acrylate compound; (B) a (meth)acrylolylphosphate; (C) a polyfunctional (meth)acrylate compound; and (D) a photopolymerization initiator. The composition exhibits a fast cure speed, and the cured products obtained from the composition exhibit superior adhesion under high temperature-high humidity conditions and metal corrosion properties.
摘要:
Un support d'enregistrement optique (1 ) est doté d'un premier ensemble (A) comportant au moins une couche support (2) munie d'une piste (3) et une couche active (4) apte à se déformer sous l'effet d'une contrainte thermique et d'un second ensemble (B) comportant au moins une couche de protection (7). Le second ensemble (B) est fixé à la couche active (4) du premier ensemble (A) par l'intermédiaire d'une couche adhésive déformable constituée par une couche de colle uréthane acrylate (10). La colle uréthane acrylate est avantageusement choisie de manière à avoir une température de transition vitreuse inférieure à 0°C et de préférence, comprise entre -50°C et -10°C et l'épaisseur de la couche de colle uréthane acrylate (10) est, de préférence, comprise entre 5µm et 100µm et plus particulièrement entre 10µm et 50µm.