发明名称 |
Hologram optical element, fabrication method thereof, and image display apparatus |
摘要 |
A volume-phase reflection hologram optical element is fabricated by exposing a hologram photosensitive material to two coherent light beams. One exposure light beam has an axis-asymmetric wavefront, and the other exposure light beam has focus points different in the optical axis direction (Z-direction) between on a plane (ZX-plane) including one of two directions (X- and Y-directions) mutually perpendicular on a sectional plane perpendicular to that light beam and on a plane (YZ-plane) including the other of those two directions. Thus, an image display apparatus is realized in which at the time of reproduction, the component of a predetermined wavelength of the image light diffraction-reflected by the hologram optical element is focused at positions different in the optical axis direction between on the ZX-plane and on the YZ-plane, offering different image viewing characteristics between in the X- and Y-directions.
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申请公布号 |
US7999982(B2) |
申请公布日期 |
2011.08.16 |
申请号 |
US20080126105 |
申请日期 |
2008.05.23 |
申请人 |
KONICA MINOLTA HOLDINGS, INC. |
发明人 |
ENDO TAKESHI;SHIMIZU YOSHIE |
分类号 |
G03H1/00;G02B5/32;G09G5/00 |
主分类号 |
G03H1/00 |
代理机构 |
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