Abstract:
A disk-shaped optical information recording medium comprising a recording layer, a barrier layer, a pressure sensitive adhesive layer or an adhesive layer, and a cover sheet in this order on a substrate, and having a central hole, a track pitch of 300 to 600 nm and a groove depth of 40 to 150 nm, for recording and playing back information by being irradiated with a laser light at a wavelength of 500 nm or less, wherein the substrate and the barrier layer are closely adhered via the pressure sensitive adhesive layer or the adhesive layer at a region including a portion of an inner circumference vicinity and an outer circumference vicinity, and the maximum value for the radial length of the closer adhesion region is at least 0.4 mm.
Abstract:
A disk-shaped optical information recording medium comprising a recording layer, a pressure sensitive adhesive layer or an adhesive layer, and a cover sheet in this order on a substrate, and having a central hole, a track pitch of 300 to 600 nm and a groove depth of 40 to 150 nm, for recording and playing back information by being irradiated with a laser light at a wavelength of 500 nm or less, wherein the substrate and the cover sheet are closely adhered via the pressure sensitive adhesive layer or the adhesive layer at a region including a portion of an inner circumference vicinity and an outer circumference vicinity, and the maximum value for the radial length of the closer adhesion region is at least 0.4 mm.
Abstract:
The present invention provides an optical data recording medium excellent in recording sensitivity and recording property (jitter). On a transparent substrate, in which a pre-groove having a depth of 20 to 100 nm is formed, a dye recording layer is formed to have a thickness at a groove portion of 50 to 160 nm and a thickness at a land portion of at least 80% of the thickness at the groove portion.
Abstract:
An optical information recording disc such as CD-R or DVD-R is composed of a transparent disc substrate provided with a spiral pregroove, a recording dye layer, placed in the pregroove, and a light-reflecting layer, wherein the pregroove formed in the area between an inner circle having a radius corresponding a half of a radius of the disc substrate and an outer circle having a radius corresponding 19/20 of the radius of the disc substrate has a radiused top corner at least one side, under the condition that the radius of the radiused corner on the outer circle is more generous than the radius of the radiused corner on the inner circle.
Abstract:
An information recording medium is disclosed, comprising a substrate having provided thereon a recording layer capable of recording information by a laser ray, wherein the recording layer contains a dye compound represented by formula (I-1): wherein R1, R2, R3 and R4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted heterocyclic group, L1, L2 and L3 each independently represents a methine group which may have a substituent, m represents 0, 1, 2 or 3, Xk+ represents a cation and k represents an integer of from 1 to 10, provided that when m is 2 or 3, the plurality of L2 and L3 groups may be the same or different. Also disclosed is an information recording method using the above-described information recording medium.
Abstract:
The present invention provides a light-emitting device which includes, in the order mentioned, a light-emitting layer containing a light-emitting portion, an intermediate layer, and a fine concavo-convex pattern, wherein the intermediate layer is disposed over a second surface of the light-emitting layer which surface is opposite to a first surface of the light-emitting layer, wherein the fine concavo-convex pattern has a cross-sectional shape which has portions projected and recessed with respect to the light-emitting layer, and reflects light emitted from the light-emitting layer, and wherein at least part of the intermediate layer has a refractive index of 0.9n to 1.1n, where n denotes a refractive index of the light-emitting portion with respect to light which has a main light-emitting wavelength.
Abstract:
A recessed portion forming method for forming a plurality of recessed portions in a thermally deformable heat mode recording material layer is provided, which method includes: a recessed portion forming step of applying condensed light emitted from an optical system including a light source, to the recording material layer to form the recessed portions; an inspection light illumination step of applying inspection light to the recessed portions during or after formation of the recessed portions in the recording material layer; a detection step of detecting a light quantity of the inspection light reflected or diffracted from the recessed portions; and an output regulation step of regulating an output of the light source based upon the light quantity so that the light quantity becomes a predetermined value. Methods for manufacturing a pit-projection product, a light emitting element, and an optical element, using this method are also provided.
Abstract:
A method by which depressions and projections (pit pattern) can be formed directly and easily in a substrate made of inorganic material is provided. A method for forming a medium on which information is recorded in a pit pattern comprises the steps of: forming a recording material layer over a substrate made of inorganic material wherein the recording material layer is of a thermally deformable heat mode recording material; forming a plurality of holes by application of condensed light to the recording material layer; and forming a plurality of pits in the substrate wherein the plurality of pits corresponding to the plurality of holes are etched by using as a mask the recording material layer in which the plurality of holes are formed.
Abstract:
A method for processing a workpiece (10) having a photoresist layer (12) using an exposure device (30) is disclosed. A transparent sheet (20) which allows transmission of light emitted from the exposure device (30) is disposed between an object lens (35a) of the exposure device (30) and the photoresist layer (12), and the photoresist layer (12) is exposed to the light through the transparent sheet (20).
Abstract:
The present invention provides an optical recording method including: recording information on a recording layer for holographically recording information in an optical recording medium by irradiating the optical recording medium with an information beam and a reference beam, and repetitively recording information on the recording layer while moving at least any one of the information beam and reference beam and the recording layer along the surface of the recording layer, thereby being capable of shift-multiplex recording operations, wherein the optical recording medium is irradiated on a recording pulse basis, the peak intensity of light of the recording pulse is 0.1 mW to 100 mW, the irradiation time is 0.05 nsec to 1×105 nsec, and the irradiation of recording pulse is performed 5 times to 1×107 times per 1 msec; and also provides an optical recording apparatus and an optical recording medium.