Tilt detecting device
AssigneeTopcon Corporation
InventorsFumio Ohtomo, Jun-ichi Kodaira
Life of this patent
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Abstract
A tilt detecting device for detecting tilt by a reflection light from a free liquid surface, comprising a photodetection element, a liquid member for forming the free liquid surface, a fixed reflection member fixed on a structural member, a free liquid surface light projecting system for projecting a light toward the liquid member, a fixed reflection member light projecting system for projecting a light toward the fixed reflection member, a photodetection optical system for guiding the reflection light from the free liquid surface of the liquid member and a reflection light from the fixed reflection member toward the photodetection element, and an arithmetic processing unit for calculating deviation based on two reflection images received by the photodetection element.
Claims13
A tilt detecting device for detecting tilt by a reflection light from a free liquid surface, comprising a photodetection element, a liquid member for forming said free liquid surface, a fixed reflection member fixed on a structural member, a free liquid surface light projecting system for projecting a light toward said liquid member, a fixed reflection member light projecting system for projecting a light toward said fixed reflection member, a photodetection optical system for guiding the reflection light from said free liquid surface of said liquid member and a reflection light from said fixed reflection member toward said photodetection element, and an arithmetic processing unit for calculating deviation based on two reflection images received by said photodetection element.
Dependencies are inferred from the claim text.