| 发明名称 |
INFRARED OPTICAL SYSTEM, INFRARED IMAGE CAPTURING APPARATUS |
| 摘要 |
There is provided an infrared optical system includes a light collecting lens having a curved light collecting surface for collecting infrared light incident from an object side, the lens being made of resin having a stepped shape being gradually deeper from periphery to center; and an optical path length correction element for correcting a difference in an optical path length produced by the stepped shape of the light collecting lens. The above-described stepped shape is provided to allow the lens to be thinner than the lens having the plano-convex shape. In other words, the infrared transmittance of the optical system is improved. In addition, the optical path length correction element can correct a difference in an optical path length produced by the stepped shape of the light collecting lens. |
| 申请公布号 |
US2015103182(A1) |
申请公布日期 |
2015.04.16 |
| 申请号 |
US201314402734 |
申请日期 |
2013.05.14 |
| 申请人 |
SONY CORPORATION |
发明人 |
Saito Masahiro;Kabasawa Hidetoshi |
| 分类号 |
G02B13/14;H04N5/33;G02B3/08 |
主分类号 |
G02B13/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An infrared optical system, comprising:
a light collecting lens having a curved light collecting surface for collecting infrared light incident from an object side, the lens being made of resin having a stepped shape being gradually deeper from periphery to center; and an optical path length correction element for correcting a difference in an optical path length produced by the stepped shape of the light collecting lens. |
| 地址 |
Tokyo JP |
