| 摘要 |
The invention relates to an optical holographic device for recording data bits in a holographic medium ( 106 ). The device comprises a light modulator ( 103 ) with addressable elements ( 301 ), each having an area and at least one optically active sub-area ( 302 ) smaller than said area, means for directing a radiation beam towards the light modulator to form an encoded radiation beam so as to record at least first and second data bits ( 401, 402 ) in the holographic medium, means ( 200 ) for displacing the encoded radiation beam with respect to the holographic medium and means for controlling the displacing means so as to record a third data ( 403 ) bit between the first and second data bits. |
