JP2010151907A5

JP2010151907A5 -

Info

Publication number: JP2010151907A5
Application number: JP2008327280A
Authority: JP
Filing date: 2008-12-24
Publication date: 2011-04-28

Claims

In an optical information recording medium for recording and reproducing information using holography,
The optical information recording medium includes a recording layer on which an interference pattern generated by signal light and reference light is recorded;
When recording information, a first state in which the signal light and the reference light that have passed through the recording layer are absorbed; and when reproducing information, a second state in which the reference light is reflected to generate phase conjugate light. A light absorbing / reflecting layer that can reversibly change between states;
An optical information recording medium comprising:

The light absorbing / reflecting layer, characterized in that the reflectance by the presence or absence of application of voltage is composed to that timber fees vary, according to claim 1, wherein the optical information recording medium.

3. The optical information recording medium according to claim 2, wherein the light absorption / reflection layer has a diffraction grating shape.

4. The optical information recording medium according to claim 3, wherein the light absorbing / reflecting layer is formed by forming an electrochromic layer on a UV resin formed in a diffraction grating shape.

4. The optical information recording medium according to claim 3, wherein the diffraction grating of the light absorption / reflection layer has a blazed shape.

The optical information recording medium according to claim 2, wherein the electrochromic material constituting the light absorption / reflection layer is a magnesium-nickel alloy.

2. The optical information recording medium according to claim 1, wherein the reflectance of the light absorption / reflection layer at the time of information reproduction is 50% or more.

In an optical information recording medium that records information using holography,
The optical information recording medium includes a recording layer on which an interference pattern generated by signal light and reference light is recorded,
When recording information, the signal light and the reference light that have passed through the recording layer can be absorbed and / or transmitted more than when information is reproduced,
An optical information recording medium comprising:

When recording the information, the layer capable of absorbing and / or transmitting the signal light and the reference light that have passed through the recording layer is more suitable for the amount of voltage applied than when reproducing the information. Consists of electrochromic materials with varying reflectivity,
The optical information recording medium according to claim 8.

When recording the information, the layer capable of absorbing and / or transmitting the signal light and the reference light that have passed through the recording layer is in the shape of a diffraction grating than when reproducing the information. ,
The optical information recording medium according to claim 9.

When recording the information, the layer capable of absorbing and / or transmitting the signal light and the reference light that have passed through the recording layer is formed in a diffraction grating shape than when reproducing the information. Constructed by forming an electrochromic layer on a UV resin.
The optical information recording medium according to claim 9.

When recording the information, the layer capable of absorbing and / or transmitting the signal light and the reference light that have passed through the recording layer is a blazed diffraction grating than when reproducing the information. ,
The optical information recording medium according to claim 10.

When recording the information, the electrochromic material that constitutes the layer capable of absorbing and / or transmitting the signal light and the reference light that have passed through the recording layer than when reproducing the information is magnesium.・ Nickel alloy
The optical information recording medium according to claim 9.

When recording the information, the layer capable of absorbing and / or transmitting the signal light and the reference light that have passed through the recording layer has a reflectivity during recording than when reproducing the information. 20% or less,
The optical information recording medium according to claim 8.

In an optical information recording medium for recording and reproducing information using holography,
The optical information recording medium includes a recording layer on which an interference pattern generated by signal light and reference light is recorded;
When recording information, the first state in which the signal light and the reference light that have passed through the recording layer are absorbed and / or transmitted compared to when information is reproduced, and when information is reproduced, information is recorded. A light absorption / reflection layer that is changeable to a second state in which the reference light is reflected to generate phase conjugate light, compared to
An optical information recording medium comprising:

A reproducing apparatus for reproducing information by using a holo grayed Rafi, the reproduction apparatus is a mountable recording medium having layers having different reflectance in response to application of voltage,
A light source for generating reference light;
Irradiating means for irradiating the recording medium with reference light generated by the light source;
A signal processing circuit for processing reproduced light irradiated and reproduced by the irradiation means;
Control means for controlling the amount of voltage applied to the recording medium;
With
The control means controls the voltage application amount so as to obtain phase conjugate light on the recording medium when reproducing information,
Optical information reproducing device.

When recording information, an interference pattern generated by the signal light and the reference light is recorded on the optical information recording medium, and when reproducing the information, the reference light applied to the optical information recording medium is used as a reflection layer of the optical information recording medium. An optical information recording / reproducing apparatus for reproducing information using phase conjugate light obtained by reflection at
A light source for generating signal light and reference light;
When recording information, a spatial light modulator that spatially modulates the signal light with the information; and
Means for irradiating the recording medium together with the reference light with the signal light modulated by the spatial modulator;
When reproducing information, an irradiating means for irradiating a recording medium with a reference beam;
A signal processing circuit for processing reproduced light irradiated and reproduced by the irradiation;
Means for changing the characteristics of the reflective layer of the recording medium;
With
The means for changing the characteristics of the reflective layer of the recording medium is such that when recording information, the reflectance is suppressed by the reflective layer compared to when reproducing information, and when reproducing information, when recording information. In comparison, the characteristics of the reflective layer are changed so as to improve the reflectance of the reflective layer.
Optical information recording / reproducing apparatus.

When recording information, an interference pattern generated by the signal light and the reference light is recorded on the optical information recording medium, and when reproducing the information, the reference light applied to the optical information recording medium is used as a reflection layer of the optical information recording medium. An optical information recording / reproducing method for reproducing information using phase conjugate light obtained by reflection at
Generate signal light and reference light,
When recording information, the signal light is spatially modulated with the information,
Irradiating the recording medium with the modulated signal light together with a reference light;
When reproducing information, the recording medium is irradiated with a reference beam,
Processing the reproduction light that has been irradiated and reproduced by the reference light,
When recording information, the reflectance is suppressed by the reflective layer, compared to when reproducing information,
When reproducing information, the reflective layer improves the reflectance compared to recording information,
Optical information recording / reproducing method.

A reproduction method for reproducing information using holography,
Generate a reference beam,
Irradiating a recording medium having a layer whose reflectivity changes according to the amount of voltage applied with the reference light,
Processing the reproduction light irradiated with the reference light and reproduced;
Controlling the amount of voltage applied to the recording medium;
Controlling a voltage application amount so as to obtain phase conjugate light in the recording medium;
Optical information reproduction method.