Abstract: A recording material of Ag1-xSbx (x=10.8˜25.5 at. %) films for WORM optical disk recording media is invented. The thermal analysis shows that the phase change temperature of AgSb film is between 250 and 270?. The optical property analysis shows that all the as deposited films have good optical absorption and high reflectivity. The X-ray Diffraction analysis shows that the as deposited film and the annealed film are kept at ??-AgSb crystalline phase. The TEM analysis shows that the grain size of the Ag80.9Sb19.1 film will grow after annealing. The dynamic test shows that the carrier-to-noise ratio (CNR) of the Ag80.9Sb19.1 optical disc is about 45 dB with ?=657 nm, NA=0.65 and a linear velocity of 3.5 m/s. These Ag1-xSbx films have good optical absorption, high reflectivity and good carrier-to-noise ratio. It can be used as the WORM optical disk recording film.
Abstract: In a holographic information recording and reproducing apparatus, an optical fiber guides a reference beam toward a recording medium for holographic recording, and a precision rotator is turned, so that the reference beam is incident on the recording medium at different angles and interferes with a data-carrying signal beam to complete the recording of holographic information on the recording medium. To reproduce the holographic information, the optical fiber guides a reading beam, and the reading beam is incident on the recording medium at an angle the same as the reference beam for the recording to reproduce the holographic information stored on the recording medium. With the optical fiber and the precision rotator, a simplified light path system and a wide range of incident angles for the reference and reading beams may be achieved, and the transmissive, reflective, and 90-degree holographic storage techniques may be integrated in one single apparatus.
October 29, 2008
May 14, 2009
CMC Magnetics Corporation, National Chiao Tung University
Abstract: A disk protecting plate includes a disk-shaped plate body having a central through hole. The plate body is provided on one side with a centered and low-raised annular wall, and a plurality of reinforcing ribs radially outward extended from the annular wall. Each of the reinforcing ribs has a top gradually inclined toward an outer circumferential periphery of the plate body. The disk protecting plate with the radially outward inclined reinforcing ribs may be made with reduced material to obtain a reinforced overall structural strength without forming an excessively thick outer periphery, and a plurality of disks concentrically stacked and packaged between two pieces of the disk protecting plates could therefore be effectively protected against damage caused by compression or impact against the disk protecting plate.
Abstract: An optical recording medium is provided with inorganic bi-layer films that were prepared by magnetic sputtering. A first recording layer containing an element selected from Si or Ge, and a second recording layer contacts with the first recording layer and containing a primary component selected from Ta, Ni or Mo. This optical media can record information by way of microscopic structure changing of bi-layer recording films after laser irradiation.
Abstract: A metal-air cell having an anode/electrolyte and a cathode includes a container having an upper interior surface and a lower interior surface for housing the anode/electrolyte and the cathode; a spring disposed on the upper interior surface; a cover electrically connected to the cathode, and having at least one recess; and at least one o-ring disposed on the lower interior surface facing the at least one recess. The spring is compressed when a force is applied so that the at least one o-ring and the at least one recess are separated, thereby forming an inlet to introduce air for electrochemical reaction. The spring is expanded when the force is removed so that the at least one o-ring is inserted within the at least one recess to obstruct the air.
Abstract: A slim storage casing able to hold two optical disks. The upper and the lower casing each have a central straddling respectively formed at the time of molding, such that two optical disks, using the-center hole of the optical disk, can be coupled to the central straddling at the upper and the lower casing respectively and stored in the storage casing. The upper and the lower casing according to the invention has a thickness of about 5 mm to 5.5 mm when coupled together.
Abstract: An optical recording medium is provided on a substrate with a recording layer. The recording layer comprises at least one kind of the trimethine-cyanine dyes and an additive, wherein the additive has a larger absorbability at the wavelength of laser beam.
Abstract: A copy-limit pre-recorded CD (Compact Disc) and a copy-limit method protect the data recorded on the pre-recorded CD from copied onto a recordable CD. The pre-recorded CD (Compact Disc) includes a data area of the pre-recorded CD and an indivisible file. The storage capacity of a data area of the recordable CD is Z. The indivisible file is stored in the data area of the pre-recorded CD and has a file size Y which approximately ranges between Z+10 MB and Z+100 MB. The copying action is prohibited to proceed when the indivisible file with a size is larger than the storage capacity of the data area of a recordable CD is determined.
Abstract: An optical recording medium provided on a substrate with a recording layer, said recording layer comprising at least one kind of the trimethine-cyanine dye and an additive, wherein said the additive of recording layer selectively comprises the dye selected from the group consisting of the chemical compounds represented by the following general formula , , , and :
“EDG” represents any electron-withdrawing substituted group such as alkylamino or anino group.
Abstract: An optical information recording medium with a recording layer enables a recording and reproducing to be effected with a 650 nm (or further) laser beam, and the recording layer contains at least one kind of the trimethine-cyanine dye which is a compound represented by the following general formula , , , .
The “EWG” represents any electron-withdrawing substituted group such as cyano or nitro group.
Abstract: A DVD, CD or VCD storage box composed of a body, a cover, a molded hinge mechanism, recesses for opening the box, an annular peak element, an annular rib, a push-down platform, at least one cantilever beam and a surface. The peak element extends upward from the body to support a disc. The push-down platform is surrounded by the peak element. The cantilever beam is also surrounded by the annular peak element. The peak element can also be surrounded by an annular rib. The cantilever beam has a free end with a protrusion formed at the free end to constrain the stored disc. The surface is connected between the push-down platform and the cantilever beam such that the disk is released from the protrusion of the cantilever beam when a load is applied to the push-down platform.
Abstract: A compact disc container includes a box defining a unitary space in which a tube projects upwardly from a bottom center thereof. A seat located around a lower outer end of the tube extends upwardly from a bottom surface of the box. The tube has a locking hole provided near a top thereof for a locking knob to engage and tighten thereto. More than one compact disc may be superimposed in the box around the tube with a lowermost compact disc supported on the seat without frictionally contacting the bottom surface of the box. The locking knob is tightened to the locking hole in the tube and locates the superimposed compact discs in the box. The unitary space of the box allows accommodation of more than one compact disc and effectively reduces costs otherwise needed for packing the compact discs individually.
Abstract: A low-profile compact disk (CD) case includes pivotally connected top cover and bottom seat to provide an inner space for receiving a compact disk therein. The bottom seat is integrally formed on an inner surface with a central holding means and a plurality of protective means. The central holding means is a short hollow cylinder upward projected from the bottom seat and has spaced cuts along its circumferential wall to provide a plurality of flexible catch pawls for holding a compact disk in place. First and second protective means are low-raised ribs for supporting and preventing the compact disk from direct contact with the bottom seat, and the third protective means are raised curved ribs higher than the first and the second ribs and the compact disk for protecting the compact disk from compression by the top cover. No extra CD deck is required and an overall height or thickness and production costs of the CD case can therefore be largely reduced.
Abstract: Disclosed is a collapsible and extendable modular CD case of which each module forming the CD case includes a base member and two side members all having a plurality of parallel partitions on their inner surfaces to provide many open compartments for each receiving a CD therein. The base member has joint arms projecting from four corners and complementary engaging means formed on a front and a rear edge. Each of the joint arms is provided on an inner surface at predetermined positions with a pivotal hole and a retaining hole to respectively receive a stud and a retaining boss correspondingly formed on an outer end surface of each side member, so that each side member is pivotally connected to and between two of the joint arms at the same side of the base member by engagement of the pivotal holes with the studs.