Method of determining optimal parameters of the optical disk

 

The invention relates to storage media, and more particularly to optical disks, and can be used in modeling and analysis of operation of optical systems for reading information from optical discs. In the proposed method models the signal read from the optical disk by detecting the signal of the laser radiation reflected from the disk with the information elements of the recording layer and difragirovavshej on the spatial structure of the information elements of the recording layer, determine the signal read from the optical disk, by calculating the full intensity of the reflected signal and the summation within the entrance pupil of the read head, determine the change of the received signal in the selected time interval for a given set of parameter values of the optical disc and information elements of the recording layer, determine the parameters of the received signal and when the signal parameters are within the permissible values memorize the set values of the parameters of the optical disk, and information elements of the recording layer. Repeat the treatment for other sets of parameter values from which to choose as optimizer is to improve the performance of determining the optimal parameters of the optical disk on the basis of effective procedures for modeling signals for different types of drives, analysis and selection of optimal sets of parameters. 10 C.p. f-crystals, 5 Il.

Description text in facsimile form (see graphic part).

Claims

The formula text in facsimile form (see graphic part)

 

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The invention relates to optical instruments, namely, devices for automatic focus when printing, photolithography and fabrication of photomasks by scanning laser writing

The invention relates to optical systems and, in particular, to search using the optical head in the optical system

The invention relates to optical systems and, in particular, to search using the optical head in the optical system

The invention relates to the field of optical information recording

The invention relates to apparatus and method of playing an optical disc

FIELD: optical discs.

SUBSTANCE: sector header on optical disc has first and second headers, recorded in a way to deflect from track middle in opposite directions, and have address areas, wherein address signals are recorded and synchronous signals areas for detecting address signals. Playback signal generator includes photo-detector, having radial couples of detecting elements. Playback signal includes total signals V1 or V2 of radial couples of detecting elements, total signal RF_sum of detecting elements, counter-phase signal RF_pp of detecting elements, from optical signal reflected from disc. Header area detector generates header area signal, containing header area from playback signal received from playback signal generator. Level detectors for first and second synchronous signals receive playback signal from playback signal generator and perform detection of value of first synchronous signal in first header and value of second synchronous signal in second header. Balance calculator calculates balance value of first and second synchronous signals. Determining of error of slant is performed in accordance to balance value.

EFFECT: higher efficiency.

2 cl, 15 dwg

FIELD: optical record/play devices.

SUBSTANCE: data area on disc is divided into sectors. Each sector header has first header and second header, recorded in a way to deflect from track middle in opposite directions. Said first and second headers have address areas, wherein sectors address signals and synchronous signals areas are recorded, wherein synchronous signals for detecting address signals are recorded. First value of synchronous clock signal is detected from first header and is a Lvfo1. second value of synchronous clock signal is detected from second header and is a Lvfo3. relation of first value Lvfo1 to second value Lvfo3 is a previously set limited value.

EFFECT: higher precision of error detection.

7 cl, 15 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

FIELD: optical data carriers.

SUBSTANCE: optical data carrier has at least two layers, each of which is a substrate with recording film, on which optically discernible code relief is formed with information elements readable via laser radiation, which contain elements with optical limiting property. Method for manufacture of optical multilayer data carrier includes manufacture of at least two layers, each of which has optically discernible code relief with laser radiation readable information elements, which are formed of substance, having property of optical limiting. Method for multilayer optical recording of data, in which information is recorded by forming and moving pulses of laser radiation flow along surface of recording film in formed tracks, filled with substance, having optical limiting property, or components for synthesis of substance, having property of optical limiting. Method for reading from optical multilayer data carrier, including forming of laser radiation flow, its focusing at read layer with optically discernible code relief with information elements, containing substance, having property of optical limiting, modulation of light signal reflected from code relief by frequency and amplitude.

EFFECT: higher efficiency.

4 cl, 3 dwg

FIELD: data carriers.

SUBSTANCE: method includes forming a mark and space with use of signal, containing record template, erasing template, having multiple pulses, and cooling pulse, connecting templates of recording and erasing.

EFFECT: higher efficiency.

3 cl, 21 dwg

FIELD: data carriers.

SUBSTANCE: method includes forming a mark and space with use of signal, containing record template, erasing template, having multiple pulses, and cooling pulse, connecting templates of recording and erasing.

EFFECT: higher efficiency.

3 cl, 21 dwg

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

FIELD: data carriers.

SUBSTANCE: in optical data carrier, including track, including multiple recesses, formed on basis of first data being subject to recording, and platforms, formed between adjacent recesses, these recesses are recorded with deformation on basis of second data. First and second data are synthesized and played for realization of sound playback with broad frequency range. Also, first data are recorded with possible playback by means of common disc player. Playback of first data is controlled by second data for protection of recorded data.

EFFECT: higher efficiency.

6 cl, 44 dwg

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