Abstract: An optical recording medium is provided with: a first substrate of optically transparent type; a first recording layer formed on one surface of the first substrate, which includes phthalocyanine dye; a second substrate of optically transparent type; a second recording layer formed on one surface of the second substrate which includes phthalocyanine dye; a first elastic body layer formed on a surface of the first recording layer at a side opposite to the first substrate; a second elastic body layer formed on a surface of the second recording layer at a side opposite to the second substrate; and a bonding layer formed between the first elastic body layer and the second elastic body layer.

Abstract: An optical recording medium comprises a light transmissive substrate, a record film formed on a surface of the base plate, the record film containing phthalocyanine as a coloring matter, a light-reflection film formed on a surface of the record film, and a protection film formed on a surface of the light-reflection film, the protection film having a thickness capable of preventing the light-reflection film from braking by a deformation thereof in directions to the light-reflection film and the protection film due to a formation of a pit in the record film.

Abstract: An optical recording medium has a substrate and a recording film, which containes coloring matter, provided on the substrate. The recording film is irradiated with a laser beam passing through the substrate so that substances of the coloring matter are aggregated with each other.

Abstract: An optical recording medium has a substrate and a recording film of phthalocyanine coloring matter provided on the substrate. A recording power is determined in such a manner that a .beta. value represented by the following equation becomes a value between -0.3 and 0.beta.=(A1+A2)/(A1-A2)where A1 represents a peak level in a plus range and A2 represents a peak level in a minus range of a reproduced signal coupled with alternating current.

Abstract: An optical recording medium comprises a baseplate and a record film, on which information is recorded,disposed on the base plate, the record film containing 5-dimethylamino indolyl fulgide, of the specific formula, and a resin binder. The information recorded in the optical recording medium is reproduced by irradiating a first light to the record film, the first light being absorbed by 5-dimethylamino indolyl fulgide in an open ring form, whereby the open ring form is changed to a closed ring form and information is recorded and irradiating a second light to the record film in which record is recorded, the second light having zero of quantum yield in changing the closed ring form to the open ring form and being absorbed by the closed ring form, whereby the recorded information is reproduced.

Abstract: A two-dimensional image information display apparatus in which an image of coordinates of display points which coincide with coordinates of designated point of input data is obtained on the display screen comprises laser beam source radiating a laser beam, drive signal generator generating a drive signal in accordance with the input data carrying the coordinates of designated point, and deflector for deflecting an angle of the laser beam in accordance with the drive signal, for irradiating the deflected laser beam onto the display screen, thereby obtaining a display point.

Abstract: This invention relates to a polyorganosiloxane comprising a polymethylsilsesquioxane structure as a main structural unit and having a methyl group and a reactive group at the side chains thereof, which is suitable as a polymer modifier; a process for producing the same; a copolymer resin obtained by polymerizing the polyorganosiloxane with a polymerizable monomer or by reacting the polyorganosiloxane with a polymer; a method for crosslinking the copolymer resin; and a coating composition containing the copolymer resin.

Abstract: An optical recording medium is provided with: a light transmissive substrate; a recording film formed of an organic dye with 2,2,3,3-tetrafluoro-1-propanol having pH of not less than 6.0 as a solvent, on a surface of the substrate; a reflective film formed on a surface of the recording film; and a protection film formed on a surface of the reflective film.

Abstract: An optical recording medium has a substrate, a recording film of phthalocyanine coloring matter and provided on the substrate, a light reflection film on the recording film, and a protection film on the light reflection film. The light reflection film is made of Au and has a thickness less than 1500 .ANG..

Abstract: A planar display device having a fast display reaction time and which can have a large screen size but which is thin and light in weight. A face plate is provided which contains fluorescent materials sensitive to three different wavelengths of invisible ultraviolet rays and which emit light in red, green and blue colors in response to stimulation by rays of the three wavelengths. The three fluorescent materials may be stacked together in layers or mixed in a single layer with a binder, and a wavelength-converting layer may be employed.

Abstract: An optical recording medium has a substrate having a groove, a recording film of phthalocyanine coloring matter and provided on the substrate, a light reflection film on the recording film, and a protection film on the light reflection film. The depth of the groove is between 800 .ANG. and 1100 .ANG..

Abstract: A reflectance of an optical recording medium provided with a light transmission substrate on which a recording film containing a dye material is formed is controlled or regulated by providing a recording film which is formed by a method comprising the steps of preparing a solution containing only a non-aggregated portion of a dye material and a solution containing only an aggregated portion of a dye material, mixing both the solutions with a predetermined mixing ratio to prepare a mixture solution and coating the mixture solution on a surface of a light transmission substrate to form a recording film of an optical recording medium having a predetermined reflectance by changing the mixing ratio. The aggregated portion of the dye material is a metal phthalocyanine aggregated material represented.

Abstract: Disclosed is an information recording medium having a recording layer which contains a phenol type compound. This information recording medium therefore exhibits very excellent effects in light resistance and is safe to use.

Abstract: An optical recording medium has a substrate and a recording film provided on the substrate. The recording film contains organic coloring matter and polyvinylbutyral. The organic coloring matter and polyvinylbutyral are dissolved by a solvent and coated on the substrate to form the recording film.

Abstract: A rewritable photochromic optical disc which comprises a photochromic recording layer made of a diaryl ethene derivative capable of assuming first to third states, the first state with a first absorption band transforming into the second state with a second absorption band in response to light of a first wavelength, the second state transforming into the first state in response to light of a second wavelength in said second absorption band, the fist state transforming into the third state with a third absorption band in response to light of a third wavelength, and the third state transforming into the first state in response to light of a fourth wavelength in said third absorption band.

Abstract: Disclosed is a method of recording, reproducing and erasing information on and from an optical recording medium. A first temperature T.sub.1 in the recording and erasing of information is set higher than a second temperature T.sub.2 in the information reproduction. Therefore, information once recorded can surely be maintained in repetitive reproduction.

Abstract: An optical recording medium provided with: a light transmissive substrate; and a recording film and a reflective film which are formed on the light transmissive substrate. The recording film includes phthalocyanine dye expressed by the following general expression [I], ##STR1## wherein R.sub.1 and R.sub.2 represent either of hydrogen, hydroxyl group, alkoxyl group, and straight chained or side chained alkyl group, respectively, R.sub.3 to R.sub.6 represent either of substituted or non-substituted alkyl group, sulfino group, amino group, or sulfonic acid group, respectively, q represents the number of substituents and is the integer of 0 to 4, and Me represents a metal atom.

Abstract: A recordable optical recording medium having sufficiently high reflectance and modulation factor to insure consistent reproduction on CD players. The optical recording medium of the present invention has a light-transparent substrate having pregrooves formed in the face of one surface, a light-absorbing layer formed on the pregrooves, a light-reflecting layer formed on said light-absorbing layer, wherein the pregrooves have a depth of .lambda./6.5 n-.lambda./2.5 n (where .lambda. is the wavelength of recording or reproducing light in nanometers, and n is the refractive index of the substrate) and a width of 0.35-0.47 .mu.m.

Abstract: Information is optically recorded to a recordable optical disk by a light beam, and a return light is received from the recordable optical disk to produce a tracking error signal. The recordable optical disk includes: a substrate having a disk shape; a groove formed on a surface of the substrate along a predetermined track which the light beam is made to follow; and a recording layer formed on the surface of the substrate, to which the information is recorded by the light beam. A depth of the groove is prescribed such that an amount of the return light from the groove becomes smaller than an amount of the return light from the portion of the recording layer other than the groove in a condition after recording.

Abstract: A tracking apparatus for an optical disk, which has a pit array along a predetermined track, is provided with: an optical pickup for irradiating a light beam to the optical disk, and receiving a light modulated and reflected by the optical disk; a tracking error signal generating circuit for generating a tracking error signal on the basis of an output signal of the optical pickup; a tracking servo circuit for making the light beam follow the pit array when a polarity of the tracking error signal changes; a comparing circuit for comparing an amplitude of a first RF signal, which is output from the optical pickup when the polarity of the tracking error signal changes from a first polarity to a second polarity which is reverse to the first polarity, and an amplitude of a second RF signal, which is output from the optical pickup when the polarity of the tracking error signal changes from the second polarity to the first polarity, with each other; and a tracking polarity inverting circuit for selectively inverting