基本信息:
- 专利标题： 廣角光學系及利用該裝置之攝影裝置
- 专利标题（英）：Wide-angle optics system and imaging device using the same
- 专利标题（中）：广角光学系及利用该设备之摄影设备
- 申请号：TW097140549 申请日：2008-10-22
- 公开(公告)号：TW200931056A 公开(公告)日：2009-07-16
- 发明人： 天內隆裕 TAKAHIRO AMANAI , 道中彰男 AKIO MICHINAKA , 後藤尚志 HISASHI GOTO
- 申请人： 奧林柏士股份有限公司 OLYMPUS CORPORATION
- 申请人地址： 日本
- 专利权人： 奧林柏士股份有限公司 OLYMPUS CORPORATION
- 当前专利权人： 奧林柏士股份有限公司 OLYMPUS CORPORATION
- 当前专利权人地址： 日本
- 代理人： 彭秀霞
- 优先权： 日本 2008-005750 20080115
- 主分类号： G02B
- IPC分类号： G02B
A wide-angle optics system has an aperture, a first lens (L1) having a positive refractive power, a second lens (L2) having a negative refractive power, and a third lens (L3) that is an aspheric lens in the order from an object side. For the shape of the third lens (L3), when viewed from a cross-section surface of the lens including an optical axis, a form in the vicinity of the optical axis is in the meniscus shape where a convex surface is directed toward the object side, while the object side surface and the image side surface at the peripheral portion are in the meniscus shape where the convex surfaces are directed toward the image side,and the following conditional equations are satisfied: -0.40 < f/f3 < 0.15 (1-1) 0.30 < hc7/hp7 < 2.0 (1-2) where f is an overall focal length of the wide-angle optics system, and f3 is a focal length of the third lens. When the light beam passing through a center of the aperture at an angle of 36 degrees relative to the optical axis is Lm, a point where Lm is passing through the image side surface of the third lens is Pm7, and a distance from Pm7 to the optical axis is hc7, while a distance from an apex Pp7 of the convex form on the image side surface of the third lens to the optical axis is hp7.