Holographic recording and reconstructing apparatus and method

A holographic recording and reconstructing method, comprising:

• recording information about temperature sensed by temperature sensing means on a holographic recording medium during recording;
• obtaining the information about the temperature from the holographic recording medium and obtaining a temperature sensed by the temperature sensing means during reconstruction;
• and
• determining the amount of wavelength shift to counteract the effects of a change in the dimension of the holographic recording medium between recording and reconstruction based on the difference between the temperatures.

A holographic recording and reconstructing apparatus, comprising:

• a light source having a variable oscillation wavelength;
• a temperature sensing unit operable to sense temperature;
• and
• a control unit operable to record information about a temperature sensed by the temperature sensing unit on a holographic recording medium during recording, to obtain the information about the temperature from the holographic recording medium and obtain a temperature sensed by the temperature sensing unit during reconstruction, to determine the amount of wavelength shift to counteract the effects of a change in the dimension of the holographic recording medium between recording and reconstruction based on the difference between the temperatures, and to shift the oscillation wavelength of the light source by the determined amount.