TH21934A - "Optical disk storage system with deflection correction and optimal distance between layers" - Google Patents

Abstract

Optical disk drive system with multiple layers of data with deflection correction. It uses a disk with maximum inter-layer spacing to reduce data conduction in a single format. Multi-layered disks have substrates with approximately one and a half thickness reduction. thick Of the separator layer that separates the first and last data layers The disc is designed to work with lenses that have Cycle deflection to compensate for the thickness of traditional single-layer disk drives. This enables disk drives to handle multi-tiered disks, including: It can also be used backwards, which is equivalent to handling disks with a single storage layer. The thickness of the substrate material plus one half the thickness of the separator layer's material. (Which may have an index value Of the light centering different from the material of the substrate) is equal for the adjustment purpose. Solved circumferential deviations with the material thickness of the substrate used in disks with layered storage. Traditional single The central point with the least circumferential deviation is therefore located at the center of the layer. Of the separator rather than on the first layer of information. The separator layer thickness is chosen so when the focal point is located on the first or last layer of data. Any particular floor will be modified. Deviation by cycle Where even if the above quantity is acceptable As a result The separator layer thickness can be greatly increased to reduce the data bracketing between the layers. In another appearance, the thickness of the substrate and the separator layer thickness are selected and Therefore, the lens is corrected for peripheral deviation with the thickness of the positive substrate material. With one and a half of the material thickness of the separator layer

Claims (4)

1.Optical data acquisition system consisting of Laser light source For generating laser beams The optical storage medium is composed of one layer of information that transmits light, the second that transmits light. And the reflector layer is located between and separates the first and second layers of data with the thickness of the aforementioned separator layer, and the lens is located between the laser source. And a layer of information on one medium to combine Laser light center to point Where the lenses are corrected for circle deviation, so the point where Centered, there will be approximately minimal circular deviations when placed between the data request layers. First and second 2. Optical disk drive system in which the lens is corrected. For the correction amount circle deviation corresponding to the fixed thickness of Optical transmission material The system consists of Laser light source To generate a laser beam An optical disk consisting of (a) a reflective substrate with a surface. That makes up the outside of the disk from which the lesor light falls. (B) the first layer of information transmitted. (C) the second reflective layer of information, and (d) the reflective separator layer between and. Separate the first and second layers of data by the layer thickness of the separator. Motor attached to the disc for rotating the disc. The lens is located between the Lysor light source. And one such surface of the substrate To center the laser beam into a point, the fixed thickness of the material transmits light where the quantity Correction for the corresponding mechanical oscillation deviation in a manner equal to The thickness of all substrates plus approximately half the thickness of the separator layer and the path that is connected to the lens to shift the lens relative to the disk. So the centralized point Therefore, it can be moved from one layer of information to another. By that way, when the point is located on The first layer of information usually has a circular deviation process because Material thickness Of the class of the separator And the total substrate thickness is less than the thickness of the material Corresponds to the correction of approximately half circle deviation. Of thickness of Class of separator And when the point is located on the second layer of data, it will have a deviation process accordingly. Circle because The thickness of the material of the separator layer and of all substrates across it. Greater than the thickness of the material corresponding to approximate circular deviation correction 3. The disk drive system, as stated in claim 2, where the fixed thickness is half the thickness of the splitter layer. Of light transmission material corresponds to the amount of correction for circle deviation Of a lens having characteristics equal to a substrate with a thickness t1 and a refractive index of n1, and where the disk substrate is made of a material with a refractive index n1 and a thickness of approx. t1-t2 / 2, where t2 is the thickness of the separator layer 4. disk drive system, as specified in claim 2, where the disk substrate is Made with a material with a refractive index of n1 and a thickness of approximately t1, and a layer of the separator made with a material with a refractive index of n2 and a thickness of approximately t2, and where thickness at The rigidity of the light transmission material corresponds to the amount of correction. For the circular deflection of the lens, it is characterized as the thickness t1 of the substrate material and the thickness t2 / 2 of the material of the separator layer. 5. Disc drive system as specified in the claim. Clause 2 where the thickness is fixed Of the light transmission material corresponds to the amount of correction for the circle deviation at It is caused by polycarbonate lenses of approximately 1.20 mm, and where the disk substrates are made of polycarbonate and are approximately 1.20 mm thick minus half the thickness of the separator layer. Drive as stated in claim 2, where the thickness is fixed Of light transmission material corresponds to the amount of correction for circle deviation Approximately 0.60 mm polycarbonate lens, and where the disc substrate is made of polycarbonate. And a thickness of approximately 0.60 mm minus half the thickness of the separator layer 7. The disk drive system, as stated in claim 2, where the disk substrate Made with polycarbonate And a length of approximately 1.20 mm. And in which the thickness is fixed Of the light transmission material corresponds to the correction amount for the circular deviation of A polycarbonate lens is 1.20mm, plus approximately half of the Separator layer thickness 8. Disk drive system as specified in Clause 2, where the disk substrate is made of polycarbonate. And a length of approximately 0.60 mm, and where the fixed thickness of the light-transmitting material corresponds to the correction amount for the deviation accordingly. The polycarbonate circle of lenses is 0.60mm plus about half. The approximate thickness of the splitter layer. 9. A compact optical disk drive (CD) system that consists of Laser light source for generating laser beams. A CD optical disk consisting of (a) a reflective substrate of t1 thickness and one surface that forms the outer surface of the disk where the laser beam is affected (b) a layer of information that One that reflects some light on the surface of the substrate. As opposed to one of the aforementioned surface (c) layers of reflective splitters t2 thick and is located on the first layer of data and (d) the second layer of information reflected on the layer of Separator and separator approximately equal to t2 from the first layer of data. Motor is attached to the disk for disk rotation. The lens is located between the laser light source and one such substrate surface. To center the laser light into a point, the lens has fixed correction for peripheral deviation and the lens connection trajectory to shift the lens relative to the disk. To make the central point It can be moved from one layer of information to another. By modifying the The deviation along the fixed loop of the lens is valued in such a way that the point near the centralization limit of the Centered light appears at approximately t1 plus t2 / 2 from one of the above surfaces. Disk Substrate 1 0. The disk is used to store optical data that is read by laser light transmitted. Corrected lenses for peripheral deviation with fixed thickness of the transmitting material. Reflector with a known index of light centralization, with a disk consisting of a transmit substrate. Reflect the layer of information that one sends some reflection. The second layer of information reflects light. The reflective layer is located between and separates the first and second layers, where the thickness of the reflective substrate plus half the thickness of the separator layer is the same. Fit such fixed thickness of reflective transmission material with index of concentricity of Such light is known. For correction of the lens for peripheral deviation 1 1. Discs, as specified in Clause 10, where the disc contains a cover. The disc and ring are assembled together. And protrudes around the perimeter of the cover of the disc and The substrate is a plastic dust cover with a ring substrate made of material. With an index of light-centered n1 and a thickness approximately equal to t1, where the separator layer is made with an index of light-centered n2 and a thickness of about t2 where the disk reads. Achieved by laser light transmitted through a corrective lens for deflection. According to the rectification quantity circle corresponds to the thickness t1 of the substrate material plus the t2 / 2 thickness of the separator layer material 1. 2. Optical disk that is read by laser light transmitted through a lens with Correction for circular or cyclic deviations, the correction amount corresponds to the The thickness of the light transmission material by the disk consists of The reflective substrate is t1 thick and one surface that makes up the matte surface. The outside of the disk where the laser beam hits the lens. A layer of information is partially reflected on the surface of the substrate that is opposite to the surface. One such The second reflective layer and the reflector layer t2 thickness and is located between and separates the layer of The first and second data where the thickness t1 of the substrate material plus half the t2 thickness of the separator layer material is equal to the thickness of the substrate material with the correction. As for circumferential or circular deviation of the lens 1 3. Disks, as described in Clause 12, where the disc is a compact disc (CD) where the substrate is polycarbonate. And where the amount of correction according to the loop The cycles required to be corrected by the t1 thickness of the substrate material plus half the t2 thickness of the separator layer material is equal to the amount of corrective action required. Corrected with polycarbonate about 1.20 mm 1 4. Discs, as set out in Clause 12, where the disc is a compact disc (CD) in which the substrate is polycarbonate. And where the amount of correction according to the loop The round to be corrected by the thickness t1 of the substrate material plus half the thickness t2 of the separator layer material is equal to the amount of rectification required. Correction with polycarbonate approximately 0.60 mm.