| 发明名称 | Optical element, optical system, and method of manufacturing optical element | ||
| 摘要 | Provided is an optical element, including optical glass as a base material and having an optical surface and a non-optical surface. In the optical element, the optical glass has a Knoop hardness of 600 N/mm2 or more, and the non-optical surface has a coating film layer formed thereon, the coating film layer containing a pigment as a color material and having a refractive index of 1.65 or more. | ||
| 申请公布号 | US9594192(B2) | 申请公布日期 | 2017.03.14 |
| 申请号 | US201514642984 | 申请日期 | 2015.03.10 |
| 申请人 | CANON KABUSHIKI KAISHA | 发明人 | Sano Daisuke |
| 分类号 | G02B1/00;G02B1/14;G02B5/00;G02B3/00;G02B13/06;G02B27/00 | 主分类号 | G02B1/00 |
| 代理机构 | Rossi, Kimms & McDowell LLP | 代理人 | Rossi, Kimms & McDowell LLP |
| 主权项 | 1. An optical system, comprising: a plurality of optical elements arranged in an optical axis direction; and an optical surface and a non-optical surface, the optical surface and the non-optical surface containing optical glass as a base material, wherein the optical glass has a Knoop hardness of 600 N/mm2 or more, wherein the non-optical surface has a coating film layer formed thereon, the coating film layer containing a pigment as a color material and having a refractive index of 1.65 or more, and wherein the optical system satisfies any one of the following conditions: Am<Ak; where 1<m<N and for any k satisfying 1≦k≦m−1;Am<Ak; where 1<m<N and for any k satisfying m+1≦k≦N; m=1; orm=N, where N represents a number of the plurality of optical elements, m represents an order from an object side of an optical element having the non-optical surface among the plurality of optical elements and Ai (i=1, . . . , N) represents a smallest diameter of the optical surface of the i-th optical element from the object side. | ||
| 地址 | Tokyo JP | ||