| 发明名称 | Imaging lens | ||
| 摘要 | A low-cost imaging lens which corrects aberrations properly with a small F-value, ensures high performance with a larger number of constituent lenses and has a more low-profile design than before. The constituent lenses are arranged in the following order from an object side to an image side: a first lens having a convex object-side surface near an optical axis; a second lens having a convex object-side surface near the optical axis; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens as a double-sided aspheric lens; a sixth lens as a double-sided aspheric lens having a concave image-side surface near the optical axis; and a seventh lens as a double-sided aspheric lens having a concave image-side surface near the optical axis. These constituent lenses are not joined to each other. | ||
| 申请公布号 | US9279963(B2) | 申请公布日期 | 2016.03.08 |
| 申请号 | US201514715244 | 申请日期 | 2015.05.18 |
| 申请人 | KANTATSU CO., LTD. | 发明人 | Ishizaka Tohru |
| 分类号 | G02B9/64;G02B3/02;G02B13/00;G02B27/00 | 主分类号 | G02B9/64 |
| 代理机构 | Westerman, Hattori, Daniels & Adrian, LLP | 代理人 | Westerman, Hattori, Daniels & Adrian, LLP |
| 主权项 | 1. A fixed-focus imaging lens composed of seven lenses to form an image of an object on a solid-state image sensor, in which the lenses are arranged in order from an object side to an image side, comprising: a first lens having a convex surface on the object side near an optical axis; a second lens having a convex surface on the object side near the optical axis; a third lens having at least one aspheric surface; a fourth lens having at least one aspheric surface; a fifth lens as a double-sided aspheric lens; a sixth lens as a double-sided aspheric lens having a concave surface on the image side near the optical axis; and a seventh lens as a double-sided aspheric lens having a concave surface on the image side near the optical axis, wherein the lenses are not joined to each other. | ||
| 地址 | Tochigi JP | ||