Abstract: An optical recording medium having at least a recording layer 11 and a light transmitting layer 13 formed on a substrate 10, in which the recording layer 11 is made of an organic material for absorbing an incident light of wavelength of 360 nm to 460 nm, and inducing physical change or chemical change to vary the refractive index, the light transmitting layer 13 is 10 &mgr;m to 177 &mgr;m in thickness, the relation between absorption coefficient “k” and pyrolysis temperature Tdec of organic material is

Abstract: Electrochromic systems containing soluble electrochromic polymers which are accessible by polymerization, polycondensation or polyaddition from electrochromic monomers are used in devices for variable transparency to electromagnetic radiation.

Abstract: An electrooptical component comprising a side-chain polymer having nonlinear optical properties is disclosed. The polymer having photoaddressable properties contains a) at least one azobenzene-based dye, b) at least one mesogenic grouping, c) optionally at least one additional monomer unit and d) optionally a solubility-improving monomer unit, with the proviso that b) is optional in the embodiments where the azobenzene-based dye is mesogenic. Examples of electrooptical components disclosed include modulators, electrostrictive actuators and piezoelectric sensor.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and, if desired, a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue or red light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one xanthene dye which contains at least two anionic groups and has at least one cation containing at least one conjugated &pgr; system having at least 6 &pgr; electrons as counterion, where the cation must not be benzyltrimethylammonium, benzyltriethylammonium, tetraphenylphosphonium, butyltriphenylphosphonium or ethyltriphenylphosphonium, is used as light-absorbent compound.

Abstract: Homopolymers suitable for storage of information provided optically are disclosed.

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one diaza hemicyanine dye is used as the light-absorbing compound.

Abstract: This invention relates to electrochromic devices containing UV-protected electrochromic solutions comprising at least one oxidizable substance RED1 and at least one reducible substance OX2 linked by a bridging group and a UV absorber component.

Abstract: The invention relates to an optical data carrier having a preferably transparent substrate that has optionally previously been coated with one or more reflection layers and to the surface of which has been applied a light-writeable information layer, optionally one or more reflection layers, and optionally a protective layer or a further substrate or a covering layer, such that the optical data carrier can be written on or read by means of blue light (preferably laser light having a specified wavelength) or by means of infrared light (preferably laser light having a specified wavelength), wherein the information layer contains

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one hemicyanine dye is used as the light-absorbing compound.

Abstract: The present invention relates to a method by which items of digital information can be stored repeatedly by light induction in a two-dimensional medium and erased again, the items of information being optically readable.

Abstract: An electrochromic device comprising a pair of glass or plastic plates or plastic films of which at least one plate or film, preferably both plates or films, are provided on in each case one side with an electrically conductive coating, of which at least one plate or film and its conductive coating is transparent, of which the other may be mirrored, and of which in the case of at least one of the two plates or films the electrically conductive layer can be divided into separate, individually contacted area segments and the conductive coatings can be connected at at least one point to an electrical conductor, where the plates or films are joined together via a sealing ring on the sides of their conductive coating, and the volume formed by the two plates or films and the sealing ring is filled with an electrochromic medium which comprises at least one reducible electrochromic compound OX2 and at least one oxidizable electrochromic compound RED1, in which the electrochromic medium also comprises a further reducib

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cationic aminoheterocyclic dye is used as light-absorbent compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cyanine dye is used as light-absorbent compound.

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one heterocyclic azo dye is used as the light-absorbing compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one merocyanine dye is used as light-absorbent compound.

Abstract: An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one triazacyanine dye is used as the light-absorbing compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with a protective layer and to whose surface a light-writable information layer, if desired a protective layer, if desired an adhesive layer and finally a covering layer have been applied, which can be written on and read by means of blue light, preferably laser light, where the information layer comprises a light-absorbent compound, characterized in that at least one dye which cyclizes thermally is used as light-absorbent compound.

Abstract: The novel electrochromic system comprises at least one reducible and at least one oxidizable substance OX2 and RED1, respectively, which are linked to one another via a bridge and are outstandingly suited for use in an electrochromic device.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on and read by means of infrared light, preferably laser light, particularly preferably light having a wavelength in the range 750-800 nm, in particular 770-790 nm, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cobalt(III) phthalocyanine in which the Co metal centre bears two axial substituents R1 and R2 which represent, independently of one another, CN, SCN, alkoxy or alkylthio is used as light-absorbent compound.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with a reflection layer and to whose surface a light-writeable information layer, if desired a reflection layer and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that the light-absorbent compound has at least two identical or different chromophoric centers and has at least one absorption maximum in the range from 340 to 820 nm.