摘要:
High sensitive organic dye-in-polymer (DIP) medium for write-once-read-many (WORM) optical discs with fluorescent reading. The medium consists of a fluorescent color means, capable of absorbing writing radiation produced by a laser, a compound capable of generating free radicals upon influence of heat produced by the writing radiation and a polymer capable of producing a translucent film enabling high quantum yield of the fluorescence induced in the color means. The color means can be selected from xanthene dyes of the eosine and rhodamine groups, acridine, oxazine, azine, peylene, violanthrone, cyanine, phtalocyanine, indigoide colors and porphyries. The free radicals generating compound can be chosen from the group of compounds comprising azo and diazoi compounds or peroxyde compounds. The film producing polymer can be selected from the group of compounds comprising cellulose ethers, vinyl resins or acrylic resins.
摘要:
The invention concerns a optical data memory, said memory comprising at least one layer (6A, 6B, 6C) of supporting material, said supporting material including molecules (2, 4) having, in a local zone (9), a collective state of molecules from at least one first collective state of molecules (4), and a second collective state of molecules (2). The invention is characterized in that only molecules having the first collective state of molecules (4) in said local zone (9) are capable of generating a second-harmonic signal when they are excited in said local zone by a reading electromagnetic radiation.
摘要:
The present invention relates to phthalimide based azo metal complex dyes and their use in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength up to 450 nm. The invention further relates to a write once read many (WORM) type optical data recording medium capable of recording and reproducing information with radiation of blue laser, which employs a phthalimide based azo metal complex dye in the optical layer.
摘要:
The present invention relates to the use of pyridine N-oxide based azo dyes and their metal complexes in optical layers for optical data recording, preferably for optical data recording using a blue laser with a wavelength up to 450 nm or a red laser with a wavelength up to 650 nm. The invention further relates to a write only read many (WORM) type optical recording medium capable of recording and reproducing information with radiation of a blue or red laser, which employs a pyridine N-oxide based azo dye or a respective metal complex in the optical layer.
摘要:
The invention relates to an optical recording medium comprising a substrate, a recording layer and a reflecting layer, wherein the recording layer comprises a compound of formula (I), (II), (III), (IV), (V) or a tautomer or a salt thereof. For the precise definitions of the substituents, reference is made to the description. Recording and playback are carried out especially at a wavelength of from 350 to 500 nm, for example using a blue laser. The recording and playback quality is excellent and allows high storage density. Also claimed are optical recording media for recording or playing back at from 380 to 440 nm that comprise a compound having an absorption maximum in the wave range from 300 to 400 nm and a compound of formula (IX).
摘要:
The invention relates to a data carrier (1) comprising a memory layer (2), which contains a dye that can be altered by exposure. Said carrier is used to store micro-images, by means of a writing beam of a writing device.
摘要:
The invention relates to an inscribable optic storage medium comprising a protective layer, one or more inscribable layers, optionally a reflecting layer and at least one support layer. The support layer has at least one colorant with at least 70 % transmission at the laser wavelength used for writing and/or reading, and with at least 70 % absorption at all other wavelengths of visible light which are at least 100 nm shorter than the wavelength of the laser light.
摘要:
A write-once optical recording medium having on a substrate a recording layer on which information can be written and/or read out therefrom with a laser beam, where a proper tracking error signal is ensured over the whole surface of the medium. The medium is adaptable to high information recording density. This medium is produced by forming a recording layer by vacuum depositing on the substrate a recording layer-constituting material containing a metal-containing azo compound having a weight-loss starting temperature or a decomposition temperature ranging from 300 to 500 DEG C.
摘要:
The present invention relates to specific pentamethine cyanine azo complex dye compounds and their use as dyes in optical layers for optical data recording, preferably for optical data recording using a laser with a wavelength from 630 to 670 nm. The invention further relates to an optical layer comprising said dyes and to a write only read many (WORM) type optical recording medium capable of recording and reproducing information with radiation of a red laser, which employs said pentamethine cyanine azo complex type dye in the optical layer.