| 摘要 |
Attenuation of light (10'-10''') from the first lamp (6) passing through the band (2) gives a measure of the thickness of the band. The center of the first diverging light beam falls on a measurement spot (12) on the center of the band. Photocells (8',8''') are mounted under the band. The measurement system (1) has a C-shaped housing (3) and the lamps are mounted in the top part (4) and the photocells are mounted in the bottom part (5). Light from the second lamp (13) is reflected off the surface of the band into a camera. |
