Patent application number | Description | Published |
20080259778 | PROCESS FOR INTENTIONAL DETERIORATION OF THE CONTENTS OF AN OPTICAL RECORDING MEDIUM - The invention relates to the field of optical information recording. In order to prevent abusive or fraudulent use of storage media, the invention provides a process for intentional degradation of information by application of a laser power below the normal power for reading information recorded in super-resolution on the media. This process relies on the surprising observation that a laser power below the super-resolution read power produces an irreversible degradation of the information recorded. This observation has been made with regard to media composed of a three-layer structure comprising an InSb or GaSb layer between two ZnS/SiO | 10-23-2008 |
20080260983 | Irreversible Optical Recording Medium Comprising A Track with Low Raised Zones And Method For Using Same - An irreversible optical recording medium comprises at least a substrate whereon is arranged at least a photosensitive layer comprising a structured front face destined to receive an optical radiation during data recording and/or reading operations. The medium also comprises a track comprising raised zones, having:
| 10-23-2008 |
20080267037 | METHOD OF READING OPTICAL INFORMATION IN SUPER-RESOLUTION - The invention relates to the reading of digital optical recordings at very high density (CD, DVD, etc.). Reading is done by a PRML (“Partial Response Maximum Likelihood”) technique which uses a model of analog response to the recording of an isolated information bit. Customarily, the response model is represented by four or five signal samples having standardized levels 1 or 2. To take account of particular phenomena of super-resolution reading, the invention proposes the use of a model having 6 to 10 samples that can take 4 or 5 standardized levels. This model can result from the superposition of two simpler models having only two possible levels of samples taken from 1, 2 and 3. | 10-30-2008 |
20080267048 | Irreversible Optical Recording Medium by Formation of Bubbles Having a Height Limited by the Gas Source Generating Them - An irreversible optical recording medium comprises at least an active layer presenting a rear face and a front face designed to receive at least an optical writing radiation. The optical writing radiation enables gas bubbles forming write marks to be formed locally in said active layer by means of a layer forming a gas source arranged on the rear face of the active layer. The layer forming the gas source moreover has a thickness less than or equal to 100 nm so as to limit the height of the bubbles formed in the active layer and therefore to improve tracking when read operations are performed. The layer forming the gas source is preferably made of carbon-doped hydrogenated amorphous silicon oxide. | 10-30-2008 |
20090205090 | OPTICAL COMPONENT OPERATING IN NEAR-FIELD TRANSMISSION - This is a near-field detection optical component operating in transmission. It includes at least one portion ( | 08-13-2009 |
20100092717 | OPTICAL RECORDING MEDIUM BASED ON A TELLURIUM AND ZINC ALLOY - The optical recording medium comprises an active layer made of inorganic material, presenting a front face for receiving an optical radiation during writing operations, and a rear face. The inorganic material is a tellurium and zinc alloy comprising an atomic percentage of between 60% and 70% of zinc and between 30% and 40% of tellurium. The alloy comprises preferably 65% of zinc and 35% of tellurium. The medium may comprise a semi-reflecting layer arranged on the front face of the active layer and/or an additional metal layer arranged on the rear face and/or a protective layer of polymer material on the rear face. Thus, writing powers, a mark resolution and a storage density corresponding to DVD format specifications may be achieved. | 04-15-2010 |
20100141612 | ELECTRODE OF A LIGHT-EMITTING DEVICE OF THE OLED TYPE - An electrode of a light-emitting device of the OLED type adapted for forming with a second electrode, an optical cavity, including at least one layer based on a material of refraction index n | 06-10-2010 |
20100200770 | Solid Immersion Lens and Related Method for Making Same - The invention generally pertains to the field of solid immersion lenses for optical applications in high resolution microscopy. The lens of the invention includes a spherical sector limited by a planar surface and an object having nanometric dimensions arranged on the planar surface at the focus of said solid immersion lens. A light-opaque layer having a central opening with nanometric dimensions can be provided on the planar surface, said opening being centred on the focus of the solid immersion lens. The nano-object can be a tube or a thread having a cylindrical shape. The lens of the invention can be made using lithography techniques. | 08-12-2010 |
20100291338 | High-Resolution Optical Information Storage Medium - The invention relates to optical information storage. | 11-18-2010 |