415results about "Indication/information parts for identification" patented technology

According to one embodiment, a write-once type information storage medium comprises an organic dye based recording material having sensitivity at a wavelength of 405 nm and at a recording wavelength in the range of 600 nm to 700 nm, wherein, when absorbance of a maximum absorption wavelength in the vicinity of 405 nm is defined as 1, the absorbance is 5% or more at any wavelength in the range of 600 nm to 700 nm.

In an implementation of disc media marking, a laser renders an image on a disc media as laser marks written in concentric circular tracks. A print control application determines a radius of a first circular track such that a circumferential length of the first circular track corresponds to an integral number of laser mark spaces. The print control application further determines a radial increment from the first circular track to a second circular track such that a circumferential length of the second circular track corresponds to a second integral number of the laser mark spaces.

An optical disk apparatus records information by irradiating a laser beam from a pickup onto an optical disk. A scanning section scans the laser beam relative to the optical disk. A recording control section controls the scanning section to effect recording of information. A drawing control section is provided for controlling the pickup and the scanning section to effect drawing of a visible image on the optical disk according to image information, such that the laser beam is changed between a first intensity incapable of acting on the optical disk and a second intensity capable of acting on the optical disk. A servo section periodically detects the laser beam reflected back from the optical disk when the laser beam has the first intensity, and servo-controls the irradiating of the laser beam during the drawing of the visible image based on the detection of the laser beam. The drawing control section controls the pickup for forcibly changing the laser beam to the first intensity from the second intensity when the second intensity is maintained over a predetermined period pursuant to the image information, thereby enabling the servo section to detect the laser beam having the first intensity for continuing the servo-control.

Compositions and methods for production of color images which are developable with improved marking sensitivity and image contrast are disclosed and described. Specifically, a color forming composition can comprise a polymeric activator phase including a polymer matrix and an activator dissolved therein, a color former phase including a color former, and a radiation absorber in thermal contact with the color former phase. Particularly, the color former phase can be finely dispersed within the polymeric activator phase at an average particle size of less than 2 μm.

The present invention provides polyurethane systems which cure by radiation and thermal action with crosslinking, and use thereof for the production of holographic media. The polyurethane compositions of the invention comprise A) polyisocyanates, B) isocyanate-reactive block copolymers, C) compounds having groups which react on exposure to actinic radiation with ethylenically unsaturated compounds with polymerization, D) optionally free radical stabilizers and E) photoinitiators.

A system for initializing an optical disc player when reproduction of data from a side of a multilayer disc is desired. The initialization procedure involves determining one or more initialization values for a first layer of data on the side, storing the initialization values determined for the first layer, and repeating the determining and storing steps for the other layers on the side.

An optical recording medium according to the invention has a disc body 11 in which a label side 11b can be viewed from a light incident side 11a, a printing layer 12 that is provided on the label side 11b of the disc body 11, and an ink receiving layer that is provided on the printing layer 12. Accordingly, the printed content of the printing layer 12 can be viewed from the light incident side 11a and a user can print a desired design on the ink receiving layer 13. Therefore, the design flexibility can be enhanced and a possibility of erroneous handling of the optical recording medium by the user can be drastically reduced. In addition, the optical recording medium by manufacturer or brand can be visually discriminated.

An optical disk has a first substrate having a recording layer thereon, information to be recorded on the recording layer being reproducible with irradiation of a laser beam, a reflective layer formed on the recording layer, and a second transparent substrate, the laser beam being incident to the second substrate in reproduction. The first and the second substrates are bonded to each other by a bonding layer via the reflective layer. The bonding layer includes ultraviolet-hardened resin and at least one type of photochromic dye that is stable against the laser beam. In another type, the first substrate maybe transparent. Instead of the second substrate, this type has a hardcoat layer formed on a surface of the first substrate opposite to another surface thereof having the recording layer thereon, the laser beam being incident to the hardcoat layer in reproduction. The hardcoat layer includes ultraviolet-hardened resin and at least one type of photochromic dye that is stable against the laser beam.

An embodiment of the invention, to provide a recording method and a storage medium for BCA data with high reliability for a storage medium and a method for reproducing BCA data from the storage medium, and an information recording apparatus and an information reproducing apparatus. In a conventional optical disk, low reliability data is recorded in a data area of BCA. Thus, the thickness of a film material for use in a recording layer oriented to BCA data or close to the inner periphery of the storage medium in the vicinity thereof is formed in uniform thickness by using a substrate of the storage medium, the substrate being formed by being suctioned by means of adsorbing mechanisms formed in an arc shape so as to integrated two of the adsorbing mechanisms to be adjacent to each other.

An optical disc (101) to and from which information can be reproduced and recorded by laser irradiation is provided with a first recording layer (102) and a second recording layer (104). The first recording layer (102) has a first recording mark (103) that is formed in a spiral track. The second recording layer (104) is behind or in front of the read-side surface of the first recording layer (102), and neither a wobble track nor a track for reproducing or recording information by laser irradiation is formed on the second recording layer (104). On the second recording layer (104) are formed, by laser irradiation, a second recording mark (105) that is positioned in the radial direction of the optical disc according to a predetermined position on the spiral track of the first recording layer. The optical disc (101) ensures the secrecy of the copyright protected information that is recorded thereto and the copyright protection function of the optical disc (101), and is resistant against illegal copying.

An optical disc or other optical recording medium enables reading barcode-shaped-BCA marks in a burst cutting area (BCA) with tracking on while making tampering with the BCA marks difficult. The optical disc 100 has a first area 102 containing tracks at a first track pitch d2, and a second area 101 containing tracks at a second track pitch d1. The barcode-shaped marks 104 are recorded in the second area, and the second track pitch is wider than the first track pitch.

An antenna comprises a dielectric member, an antenna pattern formed on one surface of the dielectric member, and a ground pattern formed on the other surface of the dielectric member. A part or the whole of the antenna is implanted in a dielectric layer on the side from which a laser beam does not come in of an optical recording medium symmetrically having a metal layer reflecting the laser beam and the dielectric layer, thereby to provide a radio tag antenna structure for an optical recording medium which is simple, is small-sized, and can secure necessary reading performance.

A long-term solution for document and information storage is based on the storage of an image of the actual document, rather than on binary coding. Associated with the storing of this image are readers and writers that allow reading / writing in numerous formats as well as the supplementing of the stored image with other data such as digital data, bar code(s), metadata, retrieval information, and the like. This human readable format has the capability of removing the need for interpreting devices, hardware and / or software for retrieval of the stored image(s).

According to one embodiment, a write-once optical disc which uses a short-wavelength laser allows BCA information recording even using a long-wavelength laser. To this end, a groove is cut in advance on a BCA part on a molded substrate of the optical disc to store a dye. In this way, the sensitivity of the dye in the BCA increases, to allow a laser having a wavelength other than the wavelength corresponding to information recording of the dye to record a barcode pattern on the BCA.

A silver alloy reflective film is used in an optical information recording medium and contains Ag as a main component, a total of 1 to 10 atomic percent of at least one selected from Nd, Gd, Y, Sm, La, and Ce, and a total of 2 to 10 atomic percent of at least one selected from Li, Mg, Al, Zn, Cu, Pt, Au, Pd, Ru, and Rh. The reflective film preferably further contains 0.01 to 3 atomic percent of at least one of Bi and Sb and / or 2 to 10 atomic percent of at least one selected from In, Sn, and Pb. An optical information recording medium includes the silver alloy reflective film. A silver alloy sputtering target has the same composition as the silver alloy reflective film.

Sub-information necessary to reproduce main information is recorded without deteriorating the reading accuracy of the main information, so that the illegal duplication of an optical disc is prevented. An optical disc 1 is produced by forming a reflective film 1L on concave and convex marks MK after the concave and convex marks MK synchronized with the integral multiple of a channel bit length are formed in accordance with modulated main information. Thereafter, continuous or intermittent laser light synchronized with the integral multiple of the channel bit length is irradiated at intervals longer than the longest one of the concave and convex marks MK in accordance with a spiral track formed in a circumferential direction of the concave and convex marks MK, whereby an optical characteristic of the reflective film 1L is changed to form a recordable mark SMK and sub-information necessary to reproduce the main information is recorded in a superimposition manner.

According to an embodiment, a storage medium includes a transparent resin substrate having a concentric or spiral groove and a recording film formed on the groove on the transparent resin substrate, a recording mark being formed by irradiation of a laser beam, wherein a reproduction durability count in a case where reproduction is continuously carried out by a laser beam is 1,000,000 or more.

Compositions and methods for production of color images which are developable at desired wavelengths are disclosed and described. The color forming composition can include a color former which is a spiro dye. The color forming composition can include a radiation antenna admixed with or in thermal contact with the color former. The color forming composition can also be optimized for development using electromagnetic radiation having a selected development wavelength. The color forming compositions are useful in forming images on a wide variety of substrates such as optical disks.

An optical disk to which a laser ray irradiated from an optical pickup device equipped in an optical disk recording and replaying apparatus is incident, comprises two signal layers including a first signal layer and a second signal layer formed from a light incident surface side, wherein a visible image can be formed in the second signal layer (1D) by a laser ray irradiated from the light incident surface side.

An optical recording medium includes a recording layer provided on a substrate. The recording layer includes first and second information layers and a spacer layer therebetween. The optical recording medium also includes a warpage adjusting layer provided on the side of the substrate opposite to the recording layer to reduce the warpage of the spacer layer caused by curing. A moisture proof layer is formed on the surface of the warpage adjusting layer opposite to the recording layer to reduce the warpage of the warpage adjusting layer caused by moisture absorption and releasing by the warpage adjusting layer.

A DVD (number all-purpose disc) playback apparatus accurately discriminates a hybrid disc, to prevent a recordable CD (compact disc) installed therein from being damaged by a laser beam for a DVD / MMCD. The hybrid disc includes a label printed surface formed on a substrate, a CD recording surface formed below the label printed surface, having identification information expressing a disc type, and a DVD recording surface formed below the CD recording surface. The DVD playback apparatus irradiates a CD laser beam on an optical disk installed therein. If data is readable from the optical disc, it is checked whether the identification information is recorded in the predetermined recording area. The DVD playback apparatus recognizes the optical disc as the hybrid disc, if the identification information is recorded in the predetermined recording area.

A recording medium includes first information selected from a plurality of information patterns and second information selected from another plurality of information patterns for the true-false judgement. A true-false judging device performs a statistic analysis when any coincidence is found between the readout combination of the first and second information and registered combination patterns, to identify an inspected recording medium as a forged product based on the result of the statistic analysis.

The invention relates to an Ag alloy reflective film for an optical information recording medium, including Ag as a main component, at least one kind of Nd, Gd, Y and Sm in a total amount of more than 0.1 atomic percent and not more than 3.0 atomic percent and at least one kind of W, Mo, V, Zr, Nb and Cr in a total amount of 3.0 to 10.0 atomic percent; an Ag alloy reflective film for an optical information recording medium, including Ag as a main component, at least one kind of Nd, Gd, Y and Sm in a total amount of more than 0.1 atomic percent and not more than 3.0 atomic percent and at least one kind of Ti and Ta in a total amount of 5.0 to 10.0 atomic percent; an optical information recording medium including the Ag alloy reflective film; and an Ag alloy sputtering target having a composition same as that of the Ag alloy reflective film.