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Inventor:
Abe; Michiharu
Address:
Yokohama, JP
No. of patents:
26
Patents:












Patent Number Title Of Patent Date Issued
5824450 Light irradiation method and optical information recording method October 20, 1998
An irradiation method of applying a light spot or a light pattern to an object with high resolution is performed by disposing, in close vicinity to the object, a light-absorbing contrast-increasing layer whose transmittance or reflectivity with respect to an incident light thereto in
5784355 Information recording method and device July 21, 1998
A method of recording a bit stream on a Phase Change media by illuminating a laser beam on the Phase Change media includes assigning a predetermined number of channel bits to each bit of the bit stream, and assigning one of a highest power level, an intermediate power level, and a lowest
5761179 Phase-change optical recording method using pulse width modulation technique June 2, 1998
When recording data according to the PWM recording system by modulating signals, pulse modulation for pulse modulation for recording for recording a 0 signal or the like having a signal width of nT (T: Clock time) after modulation is a continuous electro-magnetic wave at a power level e,
5750293 Method of recording and reproducing information May 12, 1998
An optical recording medium composed of a transparent substrate, with an organic dye-containing layer and a light reflection layer formed on the substrate in that order, which recording medium performs recording and reproducing operations by the application of light beams used for the
5740149 Phase-change type optical recording and reproducing method April 14, 1998
When recording data according to the PWM recording system by modulating signals, pulse modulation for pulse modulation for recording for recording a 0 signal or the like having a signal width of nT (T: Clock time) after modulation is a continuous electro-magnetic wave at a power level e,
5738973 Optical information recording medium April 14, 1998
An irradiation method of applying a light spot or a light pattern to an object with high resolution is performed by disposing, in close vicinity to the object, a light-absorbing contrast-increasing layer whose transmittance or reflectivity with respect to an incident light thereto in
5738960 Optical information reproducing method April 14, 1998
An irradiation method of applying a light spot or a light pattern to an object with high resolution is performed by disposing, in close vicinity to the object, a light-absorbing contrast-increasing layer whose transmittance or reflectivity with respect to an incident light thereto in
5473591 Method for recording and reproducing data on recording mediums December 5, 1995
The present invention relates to a method of recording and reproducing data on a recording medium, wherein original data is recorded on a recording medium by converting it into a code having more than one "0" between bits "1" such as MFM code and RLL (1,7) code, and a timing of a zero-cr
5353271 Method and apparatus for recording or reproducing information on or from recording medium October 4, 1994
A method for recording or reproducing information on or from a recording medium, the method capable of reproducing serial data on the basis of signals derived on each of front edges or each of rear edges of a plurality of pieces of recorded information on the recording medium, includ
5239531 Optical information recording method using modulated optical beam August 24, 1993
An optical information recording method for recording one of signals "1" and "0" in each of bit positions alloted at regular intervals along a track of a recording medium. The method comprises the step of enhancing energy for recording a bit of "1" which is directly subsequent to a bit o
5226031 Method of reproducing information by optically scanning marks on a recording medium with compens July 6, 1993
A method of reproducing optical information by utilizing an optical information recording medium is disclosed, in which a timing mark is formed on each information track in the recording medium; an information mark is formed on each information track with a predetermined cycle at a p
5196250 Optical information recording medium March 23, 1993
An optical information recording medium is composed of a substrate and a recording layer which includes a diarylpolyene compound of formula (I): ##STR1## wherein A.sup.1 and A.sup.2 each independently represent an aryl group which may have a substituent; R.sup.1 and R.sup.2 each repr
5144552 Optical information storage medium having grooves and pits with specific depths, respectively September 1, 1992
An optical information storage medium is used for recording optical information therein and reproducing optical information therefrom. The optical information storage medium includes parallel, concentric, or helical tracking guide grooves and information tracks defined between the tr
4891305 Optical information recording element January 2, 1990
This invention relate to an optical information recording medium, characterized by having an organic thin film recording layer containing at least one of compounds expressed by the general formula (I), (II), (III) and (IV): ##STR1## (wherein in the above formulas, A, B, D and E r
4829499 Processing of a detection signal obtained by scanning an optical disk May 9, 1989
An information signal reconstructing method and apparatus for use in an optical disk system is provided. Data stored on an optical disk in a binary format is optically scanned by a photodetector to provide a detection signal. The average of this detection signal is first determined a
4767693 Optical information recording medium August 30, 1988
This invention provides an optical information recording medium that has, on a substrate, a recording layer containing a cyanine dye represented by the general formula: ##STR1## (wherein, R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each stands for a substituted
4758499 Optical information recording medium July 19, 1988
This invention relates to an optical information recording medium, characterized by having an organic thin film recording layer containing at least one of triaryl methane type coloring matters expressed by the general formula (1), (2) or (3): ##STR1## (wherein, in the above formu
4714667 Optical information recording medium December 22, 1987
The present invention relates to an optical information recording medium comprising a recording layer applied directly on a substrate or applied on a substrate by intervening an underlayer therebetween, and further comprising a protective layer on said recording layer if necessary, c
4696892 Optical information recording medium September 29, 1987
This invention relates to an optical information recording medium, characterized in that on a substrate there is applied a coloring matter film chemically inert to said substrate, said coloring matter film having an extinction coefficient of at least 1.
4656121 Optical information recording medium April 7, 1987
This invention relates to an optical information recording medium having an organic thin film recording layer, and optionally having an underlayer and/or protective layer, characterized in that at least one of said recording layer, underlayer and protective layer contains a compound
4652514 Optical information recording medium March 24, 1987
An optical information recording medium which comprises the provision of a thin film (recording layer) formed of a cyanine coloring matter and a transition metal complex being superior in long wavelength range light absorbability to said coloring matter on a transparent or opaque substra
4600625 Optical information recording medium July 15, 1986
An optical information recording medium being capable of writing and reading with laser beam which comprises forming, on a transparent or opaque substrate, a thin film (recording layer) containing a cyanine coloring matter represented by the general formula: ##STR1## (wherein, R.
4525625 Focussing control with astigmatic diffracting means June 25, 1985
Disclosed in this specification is a focussing control method for a laser retrieval apparatus. An astigmatic light flux of a laser beam is produced by a diffraction grating or hologram. It is received by a light sensitive device which is divided into four equal areas. The output signals
4477555 Optical information recording medium October 16, 1984
An optical information recording medium comprising a substrate and a recording layer superimposed on said substrate, said recording layer comprising a reflective layer in which metal particles with a particle diameter of 1500.ANG. or less have been distributed closely and a light abs
4460665 Optical information recording medium July 17, 1984
An optical information recording medium comprises a transparent or opaque substrate and a cyanine coloring matter-containing thin coloring matter layer formed on said substrate. This recording material is adapted for laser beam reading and writing.
4225211 Random phase plate for holography and process for manufacturing same September 30, 1980
A coating material such as a solution of polyvinyl butyral resin in benzene is applied to a transparent base in such a manner that the thickness thereof varies in a continuous and random manner so that concentration of light in the central area of a hologram produced using the plate is b










 
 
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