Optical fluorescent information carriers of the type
The optical media of the fluorescent type.
Optical fluorescent information carriers of the type superior to existing formats of CD, DVD and BluRay in terms of storage, the efficiency of the method and speed of reading. Such a drive can record information up to 1 terabyte, and a read speed of up to 12 gigabits per second. For comparison, a standard BluRay can hold up to 50 gigabytes at a reading rate of 576 megabits per second.
The main characteristics of optical media of the fluorescent type
Description:
Optical fluorescent information carriers of the type have a unique structure. As the structures of such optical storage media are taken multilayer waveguide structure with alternating polymer and a photosensitive functional layers with integrated diffraction gratings for addressing the read laser radiation in selected photosensitive functional layer. In the photosensitive layers is recorded information, and the polymer used for the light distribution of the reading laser. For the formation of functional layers used photosensitive substances of class hromonov — phenolic compounds produced in plants.
Developed optical media superior to the existing formats of CD, DVD and BluRay in terms of storage, the efficiency of the method and speed of reading.
The principle of recording information on optical media information of the fluorescent type, other than in existing optical disks. On the DVD, for example, information is recorded due to the “burning” laser pits in the disc material (called pita). There is a limit to the minimum size of the pits, there is also a limit on the number of layers of the disk. In the optical information medium of the fluorescent type, the recording is done at the expense of the ability of hromonov to change their properties (they glow) when exposed to light of a certain intensity.
The recording process is realized by changes in the optical properties of the functional material (substance class hromonov) caused by the phenomenon of two-photon absorption. The reading of information occurs in parallel page mode due to the single-photon fluorescence excitation of a plurality of bits recorded in a predetermined region of the specified (addressed) layer.
Such optical storage media may contain a much larger number of recording layers than in traditional media. The total number of functional layers ranges from 40 to 60.
New media can record information up to 1 terabyte, and a read speed of up to 12 gigabits per second. For comparison, a standard BluRay can hold up to 50 gigabytes at a reading rate of 576 megabits per second.
Advantages:
– high speed readout – up to 12 gigabits per second,
– high storage capacity to 1 TB
more effective the principle of entry, with no limit on number of records and layers of the disk.
The main characteristics of optical media of the fluorescent type:
| Feature | The value |
| Recording information | Laser radiation with a wavelength of 700 nm |
| Reading | Laser radiation with a wavelength of 440 nm |
| The method of addressing the functional layer | Using a diffraction grating |
| The wavelength of maximum emission of the luminescence | 530 nm |
| The volume of recorded information | 10 GB in a single functional layer |
| The number of functional layers | 40-60 |
