| 摘要 |
<p>The invention concerns a device for protecting an optical system (2) against the excess luminosity of an incident light beam (FO), comprising means (3) forming first and second light beams (F1, F2), and reflecting means (4), the first beam (F1) being guided towards the optical system (2) after being reflected on the reflecting means (4). The invention is characterised in that the reflecting means (4) is a mirror comprising a reflecting layer (11) capable of being ablated at least locally when it is subjected to high luminous intensity, and the second beam (F2) initiates the ablation process of the reflecting layer (11), which is continued and completed by the joint action of the two light beams (F1, F2).</p> |
