发明授权
- 专利标题： Wide angle projection lens and projection display device
- 专利标题（中）： 广角投影镜头和投影显示装置
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申请号： US09933896申请日： 2001-08-22
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公开(公告)号： US06577455B2公开(公告)日： 2003-06-10
- 发明人: Shinsuke Shikama
- 申请人： Shinsuke Shikama
- 优先权： JP2001-036778 20010214
- 主分类号： G02B1304
- IPC分类号： G02B1304
摘要：
A wide angle projection lens consists of a Gnp lens group having positive refractive power and a Gf lens group having positive refractive power in the order from a large conjugate side toward a small conjugate side, and further the Gnp lens group consists of a Gn lens group having negative refractive power and a Gp lens group having positive refractive power in the order from the large conjugate side toward the small conjugate side, while satisfying −1.8
公开/授权文献
- US20020154418A1 Wide angle projection lens and projection display device 公开/授权日：2002-10-24
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