Koninklijke Philips Corporation N.v.

Sony Corporation

Matsushita Electric Industrial Co., Ltd.

U.S. Philips Corporation

U.S. Philis Corporation

Panasonic Corporation

Koninklijke Philips Electronics N.v.

Hermanus Johannes Borg

Erwin Rinaldo Meinders

Guo-Fu Zhou

Takashi Ishida

Shoei Kobayashi

Tamotsu Yamagami

Shin-ichi Kadowaki

Bart Andre Salters

Cornelis Marinus Schep

Roelant Boudewijn Hietbrink

Roel Van Woudenberg

Bernardus A Jacobs

Elvira Johanna Maria Paulussen

Johannes C Rijpers

Eduard Matheus Johannes Niessen

Johannes Cornelis Norbertus Rijpers

Johan P W B Duchateau

Shin-Ichi Kadowaki

The invention provides an anti-biofouling system (200) comprising an UV-emitting element (210), wherein the UV-emitting element (210) comprises a UV radiation exit window (230), wherein the UV-emitting element (210) at least partly encloses a light source (220) configured to provide UV radiation (221), wherein the UV radiation exit window (230) is configured to transmit at least part of the UV radiation (221) of the light source (220), wherein the UV radiation exit window (230) comprises an upstream window side (231) and a downstream window side (232), wherein the UV-emitting element (210) also at least partly encloses an optical sensor (310) configured to sense radiation (421) emanating from the downstream window side (232) and configured to provide a corresponding optical sensor signal, wherein the anti-biofouling system (200) is further configured to provide said UV radiation (221) in dependence of said optical sensor signal.

Integrated system for real-time anti-fouling and biofouling monitoring

A multi-stack optical data storage medium for rewritable recording by a focused laser-light beam, the medium having a substrate with deposited on aside thereof:

Multi-stack optical data storage medium and use of such a medium

With the disc-shaped recording medium, or the disc manufacturing method according to the present invention, for both the single-layer disc and the multi-layer disc, a recording layer L, which is to be the first layer, is at the same distance, along the direction of disc thickness, from the surface of the cover layer CVLs on which falls the laser light. For the multi-layer disc, the second layer Land the following layer(s) are formed at the locations which are closer to the cover layer CVLs than the first layer L. Management information may be recorded by mobbling grooves, each layermay have tert areas, defect information, a replacement area. Thus, it is possible to improve compatibility, reliability and accessibility between a single-layer disc and a multi-layer disc. The spherical aberration for the recording/reproducing light may be controlled with respect to the selected layer.

Disc-shaped recording medium, disc driving device and disc producing method

The optical information medium for rewritable recording by means of a laser-light beam ( ) has a first recording stack ( ) having a phase change type recording layer ( ), sandwiched between two dielectric layers ( ), and has a second recording stack having a phase change type recording layer ( ), sandwiched between two dielectric layers ( ). A transparent spacer layer ( ) is interposed between the first recording stack ( ) and the second recording stack ( ). A metal mirror layer ( ) is present proximate the second recording stack ( ) at a side remote from the transparent spacer layer ( ). The first recording stack ( ) has a phase change type recording layer ( ) with substantially growth dominated or substantially nucleation dominated crystallization. The second recording stack ( ) has a phase change type recording layer ( ) of a kind different from the kind selected for the first recording stack ( ). An optimal recording and erasing behavior is achieved with a laser-light write pulse strategy and a recording velocity which are substantially equal for the recording layers ( ).

Optical information medium

A method for writing an optical record carrier, in which a mark representing recorded data is written in the record carrier by a sequence of radiation pulses. The radiation power has a different level in between the pulses of a sequence and immediately after the last pulses of a sequence. This allows an independent control of the leading and trailing edge jitter of the marks written.

Method and device for writing an optical record carrier

A rewritable optical information medium has a phase-change recording layer (3) on the basis of an alloy of Ge-Sb-Te-O, having the composition (Ge.sub.a Sb.sub.b Te.sub.c).sub.1-d O.sub.d, wherein:

Rewritable optical information medium

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Eindhoven, Netherlands

Hermanus Johannes Borg