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Light transmission measurement for solid body or fluid in tube involves light source, collimation lens, lens and mirror and lens focusing light on photocell
Light transmission measurement for solid body or fluid in tube involves light source, collimation lens, lens and mirror and lens focusing light on photocell
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机译:管中固体或液体的透光率测量涉及光源,准直透镜,透镜和反射镜以及透镜将光聚焦在光电管上
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摘要
The light transmission measurement system has a light source (1) consisting of a LED. It is followed by a collimation lens (2) and a protective window (3). A parallel light beam (10l) passes through the solid body or fluid under test (4). A reflector unit may be moved longitudinally to alter the length of the light path (13). The reflector unit has a protective window (5) and a lens (6) focusing the light onto a flat mirror (7). Reflected light passes back through the lens and window and a return beam (10ll) passes through the solid body or fluid under test to the first window and a lens (8) focusing light on a photocell (9).
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