| 摘要 |
<p>Optical apparatus includes a source light (10), a reflector (20) having a reflecting face (21) on one side facing the source of light to receive light therefrom, a small interruption (22) in the reflecting face (21), and a sampling device (30) located on the opposite side of the reflector (20) aligned with the small interruption (22) for extracting a sample of the light received by the reflecting face (21).</p> |
