发明名称 |
Projection lens, producing method of projection lens and projector having the projection lens |
摘要 |
A projection lens (46) comprises: a cylindrical exterior case (621) having a lens-shifting through-hole (625) on a side thereof and an inner circumferential step or inner flange (623); a lens (610) of which outer periphery (611) on a first side is abutted to the inner circumferential step or inner flange (623); a flexible or elastic spacer (660) abutted to an outer periphery (612) of a second side of the lens (610); and a retainer (670) holding the spacer (660), where the lens (610) is fixed on the exterior case (621).
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申请公布号 |
US2003210479(A1) |
申请公布日期 |
2003.11.13 |
申请号 |
US20030396377 |
申请日期 |
2003.03.26 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
WATANABE NOBUO;NARIMATSU SHUJI;MACHIDA TOMONOBU;UMEMURA SHUNJI;FUJISAWA SHOHEI |
分类号 |
G02B7/02;(IPC1-7):G02B7/02 |
主分类号 |
G02B7/02 |
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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