摘要:
It is an object of the present invention to provide a dye material which can be employed in short-wavelength optical recording media, while being excellent in solubility to solvents. The dye material in accordance with a preferred embodiment of the present invention contains a cyanine compound and an azo compound. The cyanine compound contains at least a trimethinecyanine compound in which an aromatic structure including two nitrogen-containing heterocyclic rings is combined to a trimethine group. At least one of the nitrogen-containing heterocyclic rings includes a benzyl group which may have a substituent, while at least one of them includes an organic group having a carbon number of 2 to 30 substituted by a nitrogen atom. The azo compound contains at least a chelate compound of a compound containing an azo group and a metal.
摘要:
An optical recording material used in an optical recording medium which can record information by light irradiation, this optical recording material containing a dye compound obtained by salt formation between a chelate compound formed by coordination between one metal and one or two compounds represented by the following general formula (1): where A and B are groups of atoms which may be identical or different, and which respectively form aromatic rings, and X1 and X2 are respectively functional groups having one or more active hydrogen atoms which may contain a substituent group, and a cation represented by the following general formula (2): where C is a group of atoms forming a benzene ring or naphthalene ring which may have a substituent group, R1 and R2 are respectively five-membered rings or six-membered rings which may have a substituent group, Y1 is a substituent group, Q3 is a nitrogen-containing heterocyclic ring which may have a condensed ring, p and q are respectively integers from 1 to 4, and n is an integer from 0 to 3.
摘要:
It is an object of the present invention to provide a multilevel optical recording medium in which influence of variation in characteristics of a recording layer in a plane of the recording layer on reproduced data can be correctedThe multilevel optical recording medium according to the present invention includes at least a recording layer 12 and is constituted so that data can be recorded therein in a multilevel manner by controlling a state of the recording layer 12 among multiple stages and the multilevel optical recording medium according to the present invention is characterized in that a plurality of calibration signals are stored in the recording layer 12. According to the thus constituted multilevel optical recording medium, since an optical data recording and reproducing apparatus can detect and correct for the variation in characteristics of the recording layer 12 in the plane thereof, even in the case where variation in characteristics of the recording layer 12 in the plane thereof is present, data recorded in the multilevel optical recording medium in a multilevel manner can be read in a desired manner.
摘要:
It is an object of the present invention to provide a multilevel optical recording medium in which influence of variation in characteristics of a recording layer in a plane of the recording layer on reproduced data can be corrected. The multilevel optical recording medium according to the present invention includes at least a recording layer 12 and is constituted so that data can be recorded therein in a multilevel manner by controlling a state of the recording layer 12 among multiple stages and the multilevel optical recording medium according to the present invention is characterized in that a plurality of calibration signals are stored in the recording layer 12. According to the thus constituted multilevel optical recording medium, since an optical data recording and reproducing apparatus can detect and correct for the variation in characteristics of the recording layer 12 in the plane thereof, even in the case where variation in characteristics of the recording layer 12 in the plane thereof is present, data recorded in the multilevel optical recording medium in a multilevel manner can be read in a desired manner.
摘要:
The present invention provides an optical recording medium that includes a recording layer composed mainly of an organic compound and can utilize blue-violet semiconductor laser light (390 to 420 nm in wavelength) as recording/reproducing laser light. The present invention also provides an optical recording/reproducing method using the optical recording medium. The optical recording medium 1 comprises at least a supporting substrate 2; a recording layer 3 on the supporting substrate 2, the recording layer 3 containing an organic compound as a major component; and a light-transmitting layer 5 on the recording layer 3, the light-transmitting layer 5 being capable of transmitting laser light with a wavelength of 390 to 420 nm for recording and reproducing information. The organic compound in the recording layer 3 includes a trimethine cyanine dye that has the minimum value nmin of its refractive index n (real part of the complex refractive index) within the range of 370 to 425 nm and has a refractive index n of 1.2 or lower with respect to the wavelength of the recording/reproducing laser light. The organic compound, when absorbing the laser light, melts or degrades to bring about a change in the refractive index, thereby effecting recording of the information.
摘要翻译:本发明提供一种光记录介质,其包括主要由有机化合物组成的记录层,并且可以利用蓝紫色半导体激光(波长为390至420nm)作为记录/再现激光。 本发明还提供一种使用光记录介质的光记录/再现方法。 光记录介质1至少包括支撑基板2; 支撑基板2上的记录层3,含有有机化合物作为主要成分的记录层3; 以及在记录层3上的透光层5,透光层5能够传输波长为390至420nm的激光以用于记录和再现信息。 记录层3中的有机化合物包括其折射率n(复合折射率的实部)的最小值n min min在370〜425nm的范围内的三甲基菁染料,以及 折射率n相对于记录/再现激光的波长为1.2或更低。 有机化合物在吸收激光时会熔化或降解以引起折射率的变化,从而进行信息的记录。
摘要:
An optical recording medium includes a recording layer containing a cyanine dye and a quencher and a light transmittance reducing section for reducing the transmission of ultraviolet rays to the recording layer, and the light transmittance reducing section is composed of at least one of a substrate and a function layer. When the component ratio of the quencher to the total number of moles of the cyanine dye and the quencher is shown by A and the transmittance of ultraviolet rays of the light transmittance reducing section is shown by B, the component ratio A and the transmittance B are defined to satisfy the following mathematical formulas (1) and (2). With this arrangement, the optical recording medium can execute recording at a high linear speed while securing sufficient light stability. 0.3≧A≧−(B+0.075)/1.25 (1) 0.3≧B≧0.05 (2)
摘要:
A reproduction method for a multi-level optical recording medium according to the present invention rotates an optical recording medium, on which recording data has been recorded according to a multi-level recording method which sets several levels for light reflectivity of virtual recording cells, emits a reproduction laser beam towards the optical recording medium, and reproduces the recording data based on an electric signal generated in accordance with a received level of reflected light, the method setting the emission power of the reproduction laser beam in a range of 1.0 mW to 2.5 mW inclusive when the optical recording medium is rotated at a linear velocity in a range of 9 m/s to 25 m/s inclusive. By doing so, it is possible to improve the read accuracy for recording data while suppressing the reproduction deterioration of the optical recording medium to a level where deterioration effectively does not occur.
摘要:
The optical recording medium comprises a light-transmitting substrate 11 having a spiral groove 11a formed thereon and a recording layer 21 containing an organic dye wherein the average inclination angle θa of the wall of the groove 11a on the inward side thereof is greater than the average inclination angle θb of the wall of the groove on the outward side thereof. In this arrangement, when the recording layer 21 is formed by a spin coating method, the dispersion of the thickness of the recording layer 21 inside the groove 11a can be prevented, making it assured that the recording layer 21 can be provided with a desired thickness over an area inside the groove 11a ranging from the inward side thereof to the outward side thereof. As a result, heat of laser beam emitted during recording can be almost uniformly dissipated over the area inside the groove ranging from the inward side to the outward side thereof to eliminate the effect of thermal interference between marks, making it possible to secure a wide power margin during a high speed recording.
摘要:
An optical recording medium (10) is adapted such that information is recorded by forming recording marks on a recording layer (12) that covers grooves (16) of an optical transparent substrate (14). In the recording layer (16), contiguously defined along a feed direction S of irradiation are virtual recording cells (40) which have a given unit length in the feed direction S of irradiation along the groove 16 and a given unit width in the direction orthogonal thereto. In addition, the groove width W is set so that 0.20×(&lgr;/NA)
摘要:
An optical disk having excellent recording characteristics at both low speed and high speed is provided by modifying a cyanine dye serving as a material of a recording layer such that the cyanine dye does not excessively remain in a groove in an optically transparent substrate. The optical disc comprises the recording layer on a surface of the optically transparent substrate, a reflective layer on the recording layer, and a protective layer on the reflective layer, wherein the recording layer contains at least one cyanine dye expressed by the following chemical formula I: wherein, R1, R2 R3, R4, R5, and R6 are hydrocarbon groups, and A and B are independently a fused benzene ring or a fused naphthalene ring optionally having a substituent, and wherein the recording layer is formed by applying the at least one cyanine dye in a fluoroalcohol solvent to the optically transparent substrate.