发明名称 |
Hologram recording device and hologram recording method |
摘要 |
A hologram recorder records a hologram in a hologram recording medium by interference of a recording beam irradiated at a predetermined incident angle to the medium via a spatial light modulator incliningly in a predetermined direction with a reference beam irradiated incliningly in an opposite direction to the recording beam so that the beams crosses at a predetermined crossing angle. The recorder includes a beam modulator for converting a Gaussian-beam having a Gaussian-distribution of intensity into a parallel beam having an intensity distribution tending to be uniform and allowing the parallel beam to travel to the spatial modulator as the recording beam. The Gaussian-beam has a center axis decentered from an optical axis of the beam modulator in a decentering direction including a directional component of the predetermined direction in which the recording beam is inclined or an opposite directional component thereto.
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申请公布号 |
US7636185(B2) |
申请公布日期 |
2009.12.22 |
申请号 |
US20080270614 |
申请日期 |
2008.11.13 |
申请人 |
FUJITSU LIMITED |
发明人 |
UNO KAZUSHI;TEZUKA KOUICHI;YOSHIKAWA HIROYASU;IWAMURA YASUMASA;YAMAKAGE YUZURU |
分类号 |
G03H1/28;G11B7/00;G11B7/125;G11B7/135 |
主分类号 |
G03H1/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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