发明名称 |
PROJECTION OPTICAL APPARATUS |
摘要 |
A projection optical apparatus capable of providing high image quality and having a reduced size. The projection optical apparatus comprises a light valve and a projection optical system including a first optical system (5) having a transmissive-refractive element and a second optical system (3′) having a reflective-refractive element. An image formed on the light valve is projected by the projection optical system on a projection surface (4). The optical axis in the first optical system (5) is folded both vertically and horizontally. The first group (5A) of the first optical system is contained in a space (dead space) whose lower limit is defined by a lower edge of the second optical system (3′)/thereby reducing the depth of the apparatus.
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申请公布号 |
US2010195061(A1) |
申请公布日期 |
2010.08.05 |
申请号 |
US20080670019 |
申请日期 |
2008.09.02 |
申请人 |
TAKAURA ATSUSHI;FUJITA KAZUHIRO;ABE ISSEI;YAMAKAGE AKIHIRO;NAGASE OSAMU;KOHNO YOSHITSUGU |
发明人 |
TAKAURA ATSUSHI;FUJITA KAZUHIRO;ABE ISSEI;YAMAKAGE AKIHIRO;NAGASE OSAMU;KOHNO YOSHITSUGU |
分类号 |
G03B21/28;G02B17/08 |
主分类号 |
G03B21/28 |
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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