发明名称 |
Computer-generated hologram and its fabrication process |
摘要 |
The invention relates to a computer-generated hologram fabrication process that can reduce loads on computation of interference fringes for an original image including micro-characters. A visually perceivable original image 11 and a visually unperceivable original image 12 (micro-characters) are defined, and sample point sources of light P are defined at a low density on the original image 11 and at a high density on the original image 12. Interference fringes of object light coming from the point light sources on the original image 11 and reference light R are found on each computation point within an area ±1 on a recording surface 20, and interference fringes of object light coming from point light sources on the original image 12 and reference light R are found on each computation point within an area ±2 on the recording surface 20. The light sources that become samples are defined at a given pitch on sectional lines obtained by cutting the original images 11 and 12 by a multiplicity of sections (parallel with an XZ plane) located at a given spacing. The section-to-section spacing for the original image 12 is made narrows than that for the original image 11. |
申请公布号 |
EP1777597(A2) |
申请公布日期 |
2007.04.25 |
申请号 |
EP20050026518 |
申请日期 |
2002.12.18 |
申请人 |
DAI NIPPON PRINTING CO., LTD. |
发明人 |
KITAMURA, MITSURU;HAMANO, TOMOHISA |
分类号 |
G03H1/08;G03H1/26;G11C13/04;G11C17/00 |
主分类号 |
G03H1/08 |
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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