发明名称 |
VARIABLE-FOCUS LENS AND PHOTOGRAPHING DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To provide a variable-focus lens capable of freely changing the refractive power and operating with a reduced deterioration in performance and a photographing device having a focal-length-variable image taking lens including the variable-focus lens. SOLUTION: The variable-focus lens includes: a lens body having an electromagnetic field generator which changes the focal length by moving, by an electromagnetic force, light-transmissive nanoparticles which are dispersed in a light-transmissive dispersion medium enclosed in a container having the shape of a lens, and which have a refractive index different from the refractive index of the dispersion medium; a moving mechanism which moves the lens body in an optical axis direction; and a focal length adjustment section which changes the focal length of the lens body by controlling an electromagnetic field generated by the electromagnetic field generator. COPYRIGHT: (C)2007,JPO&INPIT |
申请公布号 |
JP2006285182(A) |
申请公布日期 |
2006.10.19 |
申请号 |
JP20050237385 |
申请日期 |
2005.08.18 |
申请人 |
FUJI PHOTO FILM CO LTD;FUJINON CORP |
发明人 |
ITO YOSHIHIRO;NAGOU NOBUAKI;KATO TAKASHI;MIYANO TAKASHI |
分类号 |
G02F1/17;G02B3/02;G02B3/14;G02B7/28 |
主分类号 |
G02F1/17 |
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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