发明名称 |
Image pickup lens, image pickup device using same, and portable device equipped with image pickup device |
摘要 |
An image pickup lens compatible with small high-pixel image pickup elements (e.g., from CCD and CMOS image sensors having a pixel pitch of 1.75 mum and a pixel count of 5 mega pixels to CCD and CMOS image sensors having a pixel pitch of 1.4 mum and a pixel count of 8 mega pixels) is provided. An image pickup lens 7 includes, in order from an object side to an image surface side: an aperture stop 5, a first lens 1 having positive power; a second lens 2 that is a meniscus lens having negative power and whose lens surface facing the image surface side is concave; a third lens 3 that is a meniscus lens having positive power and whose lens surface facing the image surface side is convex; and a fourth lens 4 that has negative power, whose lens surfaces are both aspherical and whose lens surface facing the image surface side is concave near the optical axis. A diffractive optical element is formed on one of the lens surfaces of the first lens 1 or the second lens 2.
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申请公布号 |
US8451546(B2) |
申请公布日期 |
2013.05.28 |
申请号 |
US201013510498 |
申请日期 |
2010.08.30 |
申请人 |
IBA TAKUMI;SAWADA NAMI;YAMASHITA MASATOSHI;PANASONIC CORPORATION |
发明人 |
IBA TAKUMI;SAWADA NAMI;YAMASHITA MASATOSHI |
分类号 |
G02B3/02;G02B9/34 |
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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