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公开(公告)号：US20060103946A1
公开(公告)日：2006-05-18
申请号：US11283549
申请日：2005-11-18
申请人： Youhei Nagai , Yasuhiko Abe
发明人： Youhei Nagai , Yasuhiko Abe
IPC分类号： G02B15/14
CPC分类号： G02B15/177
摘要： A zoom lens is equipped with: a first lens group having an overall negative refractive power and a second lens group having an overall positive refractive power in sequence from the object side to the image plane side. Zoom magnification is changed from a wide-angle end to a telephoto end by moving the first lens group to the image plane side and then reversing the motion to the object side while the second lens group is moved to the object side. The condition (1) 0.90
摘要翻译： 变焦镜头配备有：具有整体负折光力的第一透镜组和从物体侧到像面侧依次具有整体正折光力的第二透镜组。 通过将第一透镜组移动到图像平面侧，然后将第二透镜组移动到物体侧的物体侧的运动反转，从广角端到望远端改变变焦倍率。 满足条件（1）0.90 <=（DG 1 + DG 2）/ fw <= 2.30和条件（2）0.5 <= | fG 1 | / fG 2 <= 1.6，其中DG 1是 第一透镜组; DG 2是第二透镜组的厚度; fw是广角镜头系统的焦距; fG 1是第一透镜组的焦距; fG 2是第二透镜组的焦距。 利用上述结构，在使zoon透镜的设计紧凑且薄型的同时，第一和第二透镜组的功率配置被适当地设置为大约3倍的变焦倍率。
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公开(公告)号：US07035024B2
公开(公告)日：2006-04-25
申请号：US11107242
申请日：2005-04-15
申请人： Youhei Nagai , Yasuhiko Abe
发明人： Youhei Nagai , Yasuhiko Abe
CPC分类号： G02B13/18 , G02B13/0035 , G02B13/16
摘要： The present invention includes, from the object side to the image plane side, an aperture stop with a predetermined diameter, a first lens with a positive refractive power and a bi-convex shape with convex surfaces facing the object side and the image plane side, a second lens being formed as a meniscus shape with a concave surface facing the object side having a negative refractive power, and a third lens being formed as a meniscus shape with a convex surface facing the object side having a positive refractive power. By having a positive refractive power for the first lens and third lens and a negative refractive power for the second lens, a suitable back focus can be maintained while reducing the total length of the lens system. The imaging lens is thin and compact and has superior optical properties suited for mobile cameras mounted in portable telephones and PDAs.
摘要翻译： 本发明从物体侧到像面侧包括具有预定直径的孔径光阑，具有正折光力的第一透镜和具有面向物体侧和像面侧的凸面的双凸形状， 第二透镜被形成为具有面向物体侧的凹面的具有负屈光力的弯液面形状，并且第三透镜被形成为具有面向物体侧的凸表面具有正折光力的弯月形状。 通过对于第一透镜和第三透镜具有正折射光焦度并且对于第二透镜具有负折光力，可以在减小透镜系统的总长度的同时保持适当的后焦点。 成像镜头薄而紧凑，具有优异的光学性能，适用于安装在便携式电话和PDA中的移动摄像机。
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公开(公告)号：US5516981A
公开(公告)日：1996-05-14
申请号：US269656
申请日：1994-06-30
申请人： Youhei Nagai
发明人： Youhei Nagai
CPC分类号： G10C3/12 , G10H1/34 , G10H1/44 , G10H2210/425 , G10H2210/616 , G10H2230/175 , G10H2230/195 , G10H2230/255
摘要： A musical instrument produces nineteen tones in each octave, and the nineteen tones have respective fundamental frequencies regulated to a geometrical series of .sup.19 .sqroot.2 so as to be highly harmonized without difficult in performance.
摘要翻译： 乐器在每个八度音阶中产生十九个音调，并且十九个音调具有相应的基频调节为19 2ROOT 2的几何系列，以便高度协调，而没有性能困难。
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公开(公告)号：US07310192B2
公开(公告)日：2007-12-18
申请号：US11283549
申请日：2005-11-18
申请人： Youhei Nagai , Yasuhiko Abe
发明人： Youhei Nagai , Yasuhiko Abe
IPC分类号： G02B15/14
CPC分类号： G02B15/177
摘要： A zoom lens is equipped with: a first lens group having an overall negative refractive power and a second lens group having an overall positive refractive power in sequence from the object side to the image plane side. Zoom magnification is changed from a wide-angle end to a telephoto end by moving the first lens group to the image plane side and then reversing the motion to the object side while the second lens group is moved to the object side. The condition (1) 0.90
摘要翻译： 变焦镜头配备有：具有整体负折光力的第一透镜组和从物体侧到像面侧依次具有整体正折光力的第二透镜组。 通过将第一透镜组移动到图像平面侧，然后将第二透镜组移动到物体侧的物体侧的运动反转，从广角端到望远端改变变焦倍率。 满足条件（1）0.90 <=（DG 1 + DG 2）/ fw <= 2.30和条件（2）0.5 <= | fG 1 | / fG 2 <= 1.6，其中DG 1是 第一透镜组; DG 2是第二透镜组的厚度; fw是广角镜头系统的焦距; fG 1是第一透镜组的焦距; fG 2是第二透镜组的焦距。 利用上述结构，在使zoon透镜的设计紧凑且薄型的同时，第一和第二透镜组的功率配置被适当地设置为大约3倍的变焦倍率。
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公开(公告)号：US20050237633A1
公开(公告)日：2005-10-27
申请号：US11107242
申请日：2005-04-15
申请人： Youhei Nagai , Yasuhiko Abe
发明人： Youhei Nagai , Yasuhiko Abe
CPC分类号： G02B13/18 , G02B13/0035 , G02B13/16
摘要： The present invention includes, from the object side to the image plane side, an aperture stop with a predetermined diameter, a first lens with a positive refractive power and a bi-convex shape with convex surfaces facing the object side and the image plane side, a second lens being formed as a meniscus shape with a concave surface facing the object side having a negative refractive power, and a third lens being formed as a meniscus shape with a convex surface facing the object side having a positive refractive power. By having a positive refractive power for the first lens and third lens and a negative refractive power for the second lens, a suitable back focus can be maintained while reducing the total length of the lens system. The imaging lens is thin and compact and has superior optical properties suited for mobile cameras mounted in portable telephones and PDAs.
摘要翻译： 本发明从物体侧到像面侧包括具有预定直径的孔径光阑，具有正折光力的第一透镜和具有面向物体侧和像面侧的凸面的双凸形状， 第二透镜被形成为具有面向物体侧的凹面的具有负屈光力的弯液面形状，并且第三透镜被形成为具有面向物体侧的凸表面具有正折光力的弯月形状。 通过对于第一透镜和第三透镜具有正折射光焦度并且对于第二透镜具有负折光力，可以在减小透镜系统的总长度的同时保持适当的后焦点。 成像镜头薄而紧凑，具有优异的光学性能，适用于安装在便携式电话和PDA中的移动摄像机。
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