摘要:
An oil-repellent coating layer 2 is disposed on both surfaces of a lens material 1 consisting of glass or a plastic. Furthermore, a minute particle layer 3 in which minute particles of a metal oxide or minute particles of a fluoride, or both, are dispersed is formed on the surface of the oil-repellent coating layer 2, and a resin layer 4 consisting of an organic compound is disposed on the surface of the minute particle layer 3. Since the adhesion between the resin layer 4 and the two-sided adhesive tape that is used when the lens is set in the lens edging machine is good, axial shifting tends not to occur during working.
摘要:
An oil-repellent coating layer 2 is disposed on both surfaces of a lens material 1 consisting of glass or a plastic. Furthermore, a minute particle layer 3 in which minute particles of a metal oxide or minute particles of a fluoride, or both, are dispersed is formed on the surface of the oil-repellent coating layer 2, and a resin layer 4 consisting of an organic compound is disposed on the surface of the minute particle layer 3. Since the adhesion between the resin layer 4 and the two-sided adhesive tape that is used when the lens is set in the lens edging machine is good, axial shifting tends not to occur during working.
摘要:
An optical recording medium which includes a PMA area, a TOC area, program area, an area that includes a user area and lead-out area. A portion of the PMA area, which relates to the program area, is in a recorded state and the TOC area is in an unrecorded state. Alternatively, the PMA may be in an unrecorded state. In addition, a password may be recorded in a portion of an information area. A method of erasing the medium and a system for reading and recording information are also provided.
摘要:
An optical information recording medium includes a substrate, and a light absorption layer formed thereon which includes a phthalocyanine compound (I) having a thermal decomposition temperature in a range of 250.degree. C. to 350.degree. C., measured by thermogravimetry with a temperature elevation rate of 10.degree. C. and a phthalocyanine compound (II) having a thermal decomposition temperature in a range of 350.degree. C. to 450.degree. C., measured by thermogravimetry with a temperature elevation rate of 10.degree. C. This optical information recording medium can be produced by providing the light absorption layer, directly or via an intermediate layer, on a substrate with information pits and/or guide grooves being on the surface thereof by film formation coating, providing a light reflection layer, directly or via an intermediate layer, on the light absorption layer by vacuum film formation, and providing a protective layer on the light reflection layer.
摘要:
An optical recording medium is composed of a substrate and a light absorbing layer serving as recording layer formed on the substrate. The light absorbing layer includes a phthalocyanine compound and a compound having a group which can be coordinated to the phthalocyanine compound.
摘要:
An optical recording medium is composed of a substrate, and a recording layer formed thereon, which is made of (a) a first recording layer which contains a light-absorbing organic compound and can be deformed upon irradiation of light thereto, and (b) a second recording layer which includes a sulfide containing antimony in an amount of 50 atm % or more, and can be deformed in accordance with the deformation of the first recording layer.
摘要:
An optical recording medium which includes a PMA area, a TOC area, program area, an area that includes a user area and lead-out area. A portion of the PMA area, which relates to the program area, is in a recorded state and the TOC area is in an unrecorded state. Alternatively, the PMA may be in an unrecorded state. In addition, a password may be recorded in a portion of an information area. A method of erasing the medium and a system for reading and recording information are also provided.
摘要:
A phthalocyanine compound of formula (I): ##STR1## wherein FIGS. 1 to 16 around the phthalocyanine skeleton indicate the positions of carbon atoms in each benzene ring thereof; an oxygen atom is bonded to the carbon atom with position 1 or 4, to the carbon atom with position 5 or 8, to the carbon atom with position 9 or 12, and to the carbon atom with position 13 or 16; R.sup.1 is a fluorine-atom substituted alkyl group; R.sup.2 is an unsubstituted phenyl group or an alkyl-group-substituted phenyl group; R.sup.3 is an unsubstituted alkyl group, a fluorine-atom substituted alkyl group or a hydrogen atom; and M represents Zn, Cu or Ni.
摘要:
An optical information recording medium is composed of a substrate and a recording layer which is formed on the substrate and made of a composition comprising at least gold and sulfur, with the gold content being 50 atomic percent or more in the composition.
摘要:
An optical recording medium is composed of a substrate, a recording layer containing an inorganic material which includes as the main component a sulfide of at least one element selected from the group consisting of the elements of IIb, IIIb, IVb, Vb, and VIb groups, which is formed on the substrate, with a complex index of refraction of (n-ik), where n.gtoreq.1.8, and k.ltoreq.0.3, and a reflection layer formed on the recording layer. In this invention, an intermediate layer can be interposed either between the substrate and the recording layer, or between the recording layer and the reflection layer.