6results about "Recording involving layer ablation" patented technology

The invention belongs to the technical field of optical discs, and particularly discloses a writing device and equipment for a single-wavelength single-servo-layer multi-recording-layer optical disc. Comprises: a first light source for generating a recording beam; the second light source is used for generating a servo light beam; the first beam splitting module is arranged at the position where the propagation directions of the recording light beam and the servo light beam intersect, and is used for transmitting the recording light beam and reflecting the servo light beam and the reflected light of the servo layer; the photoelectric detector is used for detecting a reflected light signal of the servo layer and controlling the torquer to drive the second lens to move according to the change of the reflected light signal, so that the recording light beam and the servo light beam are always focused on the data layer and the servo layer respectively; the wavelength of the recording light beam emitted by the first light source is the same as that of the servo light beam emitted by the second light source. According to the invention, data servo / write-in is realized by using the single wavelength, only the single wavelength needs to be subjected to design optimization, and the optical head has significant advantages in reducing the size of the optical head and improving the performance.

The present invention relates to a data carrier comprising a plastics substrate having first and second opposite surfaces and a thickness of at most 500 µm, wherein the first surface of the substrate is coated with a first coating, the material of the first coating being different from the material of the substrate, wherein the first coating comprises a plurality of laser-ablated recesses encoding information, and wherein the first coating comprises one or a combination of the following materials: a metal nitride, a metal carbide, a metal boride, a metal silicide.

The present invention relates to a compact writing and reading head for hyper-speed data recording on ceramic material.

The invention relates to a method for recording data in a layer of ceramic material and to a device for recording data in a layer of ceramic material.

The present invention relates to a method for recording data in a layer of a ceramic material and to a device for recording data in a layer of a ceramic material.