| 摘要 |
An optical scanning apparatus and method confocally image comparatively small features such as particles or bubbles in a relatively large volume. The main components of the apparatus include an illumination source and focusing optics, whose light is scattered to an optical sensor, typically an imager such as a camera, focal plane array, or the like. The illumination beam is focused such that its height is much less than its width, thus creating an almost planar or rectangular parallelepiped illuminated object space. The optical imager is positioned with its object-space focal plane parallel to the illumination beam such that the illumination beam passes through the in-focus object space of the imager. Images are collected while a fluid stream containing features of interest passes through imaging volume defined by the intersection of the in-focus object space and the illuminated object space. |
