| 摘要 |
The device has a cover (1) including a front face (2), and a set of infrared emitting units (6) emitting infrared radiation. The front face has a solid shell (5) mounted in the front face with respect to a support in a sealed manner. The shell is made of a non-metallic material which is partially transparent to the infrared radiation and which is chosen among zinc selenide, magnesium oxide, silica, alumina or glass-ceramic material. |
