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:
A multilayer fluorescent optical storage medium (203) has data layers (210) with fluorescent pits (211, 321) for storing the information. The pits (211, 321) on each of the layers (211) are organized to define a plurality of stills (316). Each stack of stills (316) 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:
Fluorescent read-only media multilayered information carrier with separated fluorescent information carrier regions (511) against non-fluorescent background (512) in each layer (509) and the methods for making this. A photolithography process where the data carriers are formed from an originally non-fluorescent photosensitive layer (509) applied directly onto the photomask (501), followed by exposing the layer (509) through the photomask to produce fluorescent information pits (511) immediately in front of the transparent regions (504) of the photomask. Special photochemically stable transparent luminophors which control the spectral and luminescent properties of the data carrier layers (509) are generated in the photosensitive compositions.
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:
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.