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.

A recording mark is formed on a recording medium by a predetermined recording signal, a playback signal of the recording mark formed on the recording medium is obtained, and an expected value signal of the playback signal based on the recording signal is generated. Based on an amplitude error between the playback signal and the expected value signal, and for each predetermined unit of the recording signal, a deviation amount of a mark shape of the recording mark from which the playback signal is obtained with respect to a mark shape of an ideal recording mark is calculated, and a mark shape of the recording mark formed on the recording medium is estimated. Based on the deviation amount of the mark shape of the recording mark, a correction amount is calculated for each predetermined unit of the recording signal, and a level of the recording signal is adjusted.

A recording mark is formed on a recording medium by a predetermined recording signal, a playback signal of the recording mark formed on the recording medium is obtained, and an expected value signal of the playback signal based on the recording signal is generated. Based on an amplitude error between the playback signal and the expected value signal, and for each predetermined unit of the recording signal, a deviation amount of a mark shape of the recording mark from which the playback signal is obtained with respect to a mark shape of an ideal recording mark is calculated, and a mark shape of the recording mark formed on the recording medium is estimated. Based on the deviation amount of the mark shape of the recording mark, a correction amount is calculated for each predetermined unit of the recording signal, and a level of the recording signal is adjusted.

A method and composition for enabling indirect photoexcitation whereby a large energy gap between energy levels in a second material is circumvented by a series of lower energy photoexcitations in a first material.

A method and composition for enabling indirect photoexcitation whereby a large energy gap between energy levels in a second material is circumvented by a series of lower energy photoexcitations in a first material.

The present disclosure provides an optical disk device capable of reproducing data recorded on a high linear density optical disk stably. The optical disk device according to the disclosure is characterized by being equipped with a recording expected waveform generation circuit which generates, at the time of recording, an expected waveform that is expected to be obtained at the time of decoding; and a recording pulse generation circuit which generates a recording pulse for driving a laser with power and a time width suitable for an amplitude value of the recording expected waveform for each sampling point of the recording expected waveform.

Disclosed is a rotary cage type optical disk library storage system capable of replacing optical disks. The device includes a case, a burning device, and a rotary cage storage device. The burning device is fixed in the case and includes a burn cabinet, a disk feeding mechanism and an internal gripping mechanism. Multiple optical disk cartridges are arranged in layers from top to bottom in the burning cabinet. The disk feeding mechanism is located just below the burning cabinet. The internal gripping mechanism can move up and down and grab and place the optical disk. The rotary cage storage device and the burning device are fixed in the case side by side. The rotary cage storage device includes a rotary cage mechanism, a rotary cage cassette placed in the rotary cage mechanism for storing optical disks, and a belt drive mechanism driving the rotary cage mechanism to rotate.

Disclosed is a rotary cage type optical disk library storage system capable of replacing optical disks. The device includes a case, a burning device, and a rotary cage storage device. The burning device is fixed in the case and includes a burn cabinet, a disk feeding mechanism and an internal gripping mechanism. Multiple optical disk cartridges are arranged in layers from top to bottom in the burning cabinet. The disk feeding mechanism is located just below the burning cabinet. The internal gripping mechanism can move up and down and grab and place the optical disk. The rotary cage storage device and the burning device are fixed in the case side by side. The rotary cage storage device includes a rotary cage mechanism, a rotary cage cassette placed in the rotary cage mechanism for storing optical disks, and a belt drive mechanism driving the rotary cage mechanism to rotate.

Long term optical memory includes a storage medium composed from an array of silicon nanoridges positioned onto the fused silica glass. The array has first and second polarization contrast corresponding to different phase of silicon. The first polarization contrast results from amorphous phase of silicon and the second polarization contrast results from crystalline phase of silicon. The first and second polarization states are spatially distributed over plurality of localized data areas of the storage medium.

Provided is an objective lens which is used so that more information can be accumulated in a large-capacity optical disk and which has a further enhanced numerical aperture NA. The objective lens is a single lens having the numerical aperture NA and a refractive index n, and is configured so as to satisfy: NA≥0.91 and 1.61≤n<1.72.