发明名称 IMAGE PROJECTION DEVICE
摘要 PROBLEM TO BE SOLVED: To provide an image projection device able to reduce deterioration of optical performance at a lower cost.SOLUTION: The image projection device comprises: a housing; and a projection optical system having a concave mirror and configured to project an image in conjugation with an object to a target projection surface. In the projection optical system, the entirety of the projection optical system is accommodated inside the housing. The housing has a dent. The dent includes inclinations with respect to a first opening through which projection light reflected by the concave mirror is passed and with respect to a second opening, as the opening of the dent, which is formed nearer to the target projection surface side than the first opening.
申请公布号 JP2013130881(A) 申请公布日期 2013.07.04
申请号 JP20130028139 申请日期 2013.02.15
申请人 RICOH CO LTD 发明人 FUJITA KAZUHIRO;TAKAURA ATSUSHI;ABE KAZUNARI
分类号 G03B21/14;G03B21/00 主分类号 G03B21/14
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