Abstract: A three-dimensional optical memory device comprises an optical disc positioning system, two sources of radiation with wavelengths ?1 and ?2, a focusing system, an illumination system, focusing system positioning means, a spectrum splitter, an optical sensor, and a control unit. The radiation source with wavelength ?2 is an array of laser diodes, which optical axes are parallel and lie in the same plane. The illumination system comprises: a cylindrical lens positioned so that the generatrix of its cylindrical surface is parallel to the plane of the p-n junctions of the laser diodes; a focusing lens; and a stabilizing circuit comprising a beam splitter situated between the focusing lens and the cylindrical lens, a second optical sensor optically coupled to the focusing lens via the beam splitter, and a stabilizer coupled to the focusing lens, wherein the stabilizer and the second optical sensor are electrically connected to the control unit.

Abstract: The invention relates to three-dimensional optical memory devices and can be used in all areas of computing in which it is necessary to record large data files on compact carriers. The claimed device can also be used for recording, storing and playing back video and audio recordings. A multi-layer optical disc consists of a series of alternating layers of optically transparent materials arranged in groups that comprise a layer of a material with a refraction index n1 enclosed between a layer of a material with a refraction index n2, which satisfies the relationship n2<n1, and a layer of a material with a refraction index n3, which satisfies the relationship |n3-n1|<0.001, wherein the layer with the refraction index n3 contains a photosensitive compound that can exist in two forms characterized by different optical properties.

Abstract: The invention relates to three-dimensional optical memory devices and can be used in all areas of computing in which it is necessary to record large data files on compact carriers, and also for recording, erasing and reading video data, for example, in independent video viewing systems. The device comprises an optical disc positioning system, a source of radiation with two different wavelengths that is optically coupled to a focusing system, focusing system positioning means, and an optical sensor that is optically coupled to the focusing system via a spectrum splitter and an controlled spectrum selector placed between the source of radiation with two different wavelengths and the spectrum splitter, wherein the focusing system is designed with longitudinal chromatic aberration at the given wavelengths.

Abstract: The invention relates to three-dimensional optical memory devices and can be used in all areas of computing in which it is necessary to record large data files on compact carriers. The claimed device can also be used for recording, storing and playing back video and audio recordings. A multi-layer optical disc consists of a series of alternating layers of optically transparent materials arranged in groups that comprise a layer of a material with a refraction index n1 enclosed between a layer of a material with a refraction index n2, which satisfies the relationship n2<n1, and a layer of a material with a refraction index n3, which satisfies the relationship |n3-n1|<0.001, wherein the layer with the refraction index n3 contains a photosensitive compound that can exist in two forms characterized by different optical properties.

Abstract: The invention relates to three-dimensional optical memory devices and can be used in all areas of computing in which it is necessary to record large data files on compact carriers, and also for recording, erasing and reading video data, for example, in independent video viewing systems. The device comprises an optical disc positioning system, a source of radiation with two different wavelengths that is optically coupled to a focusing system, focusing system positioning means, and an optical sensor that is optically coupled to the focusing system via a spectrum splitter and an controlled spectrum selector placed between the source of radiation with two different wavelengths and the spectrum splitter, wherein the focusing system is designed with longitudinal chromatic aberration at the given wavelengths.

Abstract: A three-dimensional optical memory device comprises an optical disc positioning system, two sources of radiation with wavelengths 21 and 22, a focusing system, an illumination system, focusing system positioning means, a spectrum splitter, an optical sensor, and a control unit. The radiation source with wavelength is an array of laser diodes, which optical axes are parallel and lie in the same plane. The illumination system comprises: a cylindrical lens positioned so that the generatrix of its cylindrical surface is parallel to the plane of the p-n junctions of the laser diodes; a focusing lens; and a stabilizing circuit comprising a beam splitter situated between the focusing lens and the cylindrical lens, a second optical sensor optically coupled to the focusing lens via the beam splitter, and a stabilizer coupled to the focusing lens, wherein the stabilizer and the second optical sensor are electrically connected to the control unit.