| 摘要 |
<p>A tilt detecting device for detecting tilt by a reflection light from a free liquid surface (6a), comprising a photodetection element (11), a liquid member (6) for forming the free liquid surface (6a), a fixed reflection member (21) fixed on a structural member, a free liquid surface light projecting system (8) for projecting a light toward the liquid member (6), a fixed reflection member light projecting system (24) for projecting a light toward the fixed reflection member, a photodetection optical system (12) for guiding the reflection light from the free liquid surface (6a) of the liquid member (6) and a reflection light from the fixed reflection member (21) toward the photodetection element (11), and an arithmetic processing unit (13) for calculating deviation based on two reflection images received by the photodetection element (11). <IMAGE></p> |
