| 发明名称 | Optical sensor and electronic apparatus utilizing an angle limiting filter | ||
| 摘要 | An optical sensor includes a light receiving element (for example a photodiode) and an angle limiting filter that limits the incidence angle of incidence light with respect to the light receiving area of the light receiving element. When a wavelength of the incidence light is denoted by λ, a height of the angle limiting filter is denoted by R, and a width of an opening of the angle limiting filter is denoted by d, “d2/λR≧2” is satisfied. | ||
| 申请公布号 | US8976357(B2) | 申请公布日期 | 2015.03.10 |
| 申请号 | US201213421583 | 申请日期 | 2012.03.15 |
| 申请人 | Seiko Epson Corporation | 发明人 | Uematsu Akira;Terashima Yoshiyuki;Sato Yoichi;Matsuo Atsushi |
| 分类号 | G01N21/25;G01J1/06;G01J3/26;G01J3/36;G01J1/04;G01J3/51;G01J3/12 | 主分类号 | G01N21/25 |
| 代理机构 | Oliff PLC | 代理人 | Oliff PLC |
| 主权项 | 1. An optical sensor comprising: a light receiving element; and an angle limiting filter that limits an incidence angle of incidence light with respect to a light receiving area of the light receiving element, wherein, a wavelength of the incidence light is denoted by λ, a height of the angle limiting filter is denoted by R, and a width of an opening of the angle limiting filter is denoted by d, “d2/(λR)≧2” is satisfied, and wherein the wavelength of the incidence light λ is between 0.5 μm and 0.9 μm. | ||
| 地址 | Tokyo JP | ||