Abstract:
Multilayer Optical Disc and Method and Apparatus for making same are proposed The technology provides increasing the number of layers in reflective optical disks of any format. The technology allows producing of multilayer optical reflective discs of any format (CD, ROM, DVD ROM, Blue Ray, HD-DVD, DVD-R, DVD-RW, etc.) using existing CD/DVD production lines with reasonable upgrading.
Abstract:
In an optical medium such as a fluorescent multilayer disk (206), both reading speed and storage capacity are increased in various ways. Multiple heads (103) can be provided, in which case one head reads information while another moves from one reading position to the next. An optical head can read from several tracks on a disk simultaneously by focusing the exiting light into a light strip and using a photo-sensor array (210). The information pages in each layer can be staggered from those in adjacent layers. The number of layers in a medium can be selected by maximizing capacity with respect to numerical aperture. To increase exposure time, a reading head can follow the medium for one reading operation and then return to its initial position for the next reading operation.
Abstract:
An optical pick-up method and device for multilayer recording medium using a source of reading radiation, a detector of reflected signal, an optical system for focusing the reading radiation into information layer and said detector of reflected signal, an arrangement for focusing and tracking control and means for suppression interference of layers reflected signals.
Abstract:
A method for manufacturing of a multi-layer optical carrier comprising forming a plurality of optically transparent layers having a surface relief in a form of information pits and spaces therebetween, coating the surface of each of plurality of optically transparent layers with at least partially reflective layer, further coating at least partially reflective layer with a planarizing layer with removing planarizing layer from spaces and partly from the pits and further removing reflective layer from spaces and from top portions of the pits.
Abstract:
Several embodiments for a new structure of multilayer data carriers of the ROM-, WORM- or RW-type and general modes of writing, reading, deleting and re-writing data to and from them are descended. Each data carrying layer is fabricated as a multi-component structure that constitutes a thin electrically controlled liquid crystal cell with at least one alignment layer made of a photo-anisotropic material which functions as a photosensitive registering layer, in which data can be written. The anisotropic absorbing material may be either fluorescent or non-fluorescent. This type of structure ensures electrical control of absorbing and emitting capacity of fluorescent molecules dispersed in the liquid crystal matrix. This, in its turn, allows partial or complete elimination of fluorescent cross talk from the adjacent data carrying layers in the reading mode both in pit-by-pit and page-by-page modesce increases the number of information layers in the carrier and minimizes parasite aberration distortions in the reading mode.
Abstract:
A multilayer fluorescent optical storage medium has data layers with fluorescent pits for storing the information. The pits on each of the layers are organized to define a plurality of stills. Each stack of stills can be read without lateral movement of the reading head. An eight-to-ten code for encoding information to be stored is also used.
Abstract:
In an optical medium such as a fluorescent multilayer disk (206), both reading speed and storage capacity are increased in various ways. Multiple heads (103) can be provided, in which case one head reads information while another moves from one reading position to the next. An optical head can read from several tracks on a disk simultaneously by focusing the exiting light into a light strip and using a photo-sensor array (210). The information pages in each layer can be staggered from those in adjacent layers. The number of layers in a medium can be selected by maximizing capacity with respect to numerical aperture. To increase exposure time, a reading head can follow the medium for one reading operation and then return to its initial position for the next reading operation.
Abstract:
An ETT ("eight-to-ten") method has been proposed for two-dimensional spatial encoding of information stored in two- or three-dimensional, in particular fluorescent optical carriers. The method specifically ensures the same writing density as DVD carriers with EFM ("eight-fourteen modulation") modulation code but for a 0.8 x 0.4 SIMILAR information pit (fluorescent mark), i.e. as in CD data carriers. The larger pit size enables a simpler technology for manufacturing fluorescent multilayer carriers, for instance of ROM type, and a stronger fluorescent signal in reading. The high writing density is ensured through virtually 100% filling of the information layer area with fluorescent marks in a gap-free manner. This allows application of the parallel data reading procedure and a ten-fold higher reading speed than in DVD systems and increasing the size of the channel bit to 0.4 mu m - which is 1.5 and 3 times higher than for CD and DVD formats.
Abstract:
In an optical medium such as a fluorescent multilayer disk (206), both reading speed and storage capacity are increased in various ways. Multiple heads (103) can be provided, in which case one head reads information while another moves from one reading position to the next. An optical head can read from several tracks on a disk simultaneously by focusing the exiting light into a light strip and using a photo-sensor array (210). The information pages in each layer can be staggered from those in adjacent layers. The number of layers in a medium can be selected by maximizing capacity with respect to numerical aperture. To increase exposure time, a reading head can follow the medium for one reading operation and then return to its initial position for the next reading operation.
Abstract:
Multilayer Optical Disc and Method and Apparatus for making same are proposed The technology provides increasing the number of layers in reflective optical disks of any format. The technology allows producing of multilayer optical reflective discs of any format (CD, ROM, DVD ROM, Blue Ray, HD-DVD, DVD-R, DVD-RW, etc.) using existing CD/DVD production lines with reasonable upgrading.