发明名称 |
FREE-FORM LENS, METHOD FOR DESIGNING FREE-FORM LENS, FREE-FORM MIRROR, METHOD FOR DESIGNING FREE-FORM MIRROR, AND PROJECTION-TYPE IMAGE DISPLAY DEVICE |
摘要 |
Provided are a free-form lens and free-form mirror having excellent molding properties, a method for designing the same, and a projection-type image display device using the same. An embodiment of the present invention is a free-form lens molded from a transparent resin for configuring an oblique-projection optical system including a free-form mirror in a projection-type image display device, the free-form lens being provided with a lens effective region in which a predetermined free-form face is formed on a surface thereof, and an edge face formed so as to surround the lens effective region, the lens effective region and the edge face in a portion of the periphery surrounding the lens effective region where the edge face is not formed being connected by a flat face and/or a curved face in the vicinity of the lens effective region, the flat face and/or curved face being set so that the direction of inclination of the lens effective region does not change, and an end face including the curved face and/or the flat face being configured as a tapered face. |
申请公布号 |
WO2015181926(A1) |
申请公布日期 |
2015.12.03 |
申请号 |
WO2014JP64256 |
申请日期 |
2014.05.29 |
申请人 |
HITACHI MAXELL, LTD. |
发明人 |
HIRATA, KOJI;YATSU, MASAHIKO;MATSUMIYA, YUKI;KATO, SHUJI;KIMURA, KAYONO |
分类号 |
G02B3/02;G02B5/10;G02B7/02;G02B17/08;G03B21/14 |
主分类号 |
G02B3/02 |
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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