Two-axis levelling instrument with a single pendulum for project

Details Two-axis levelling instrument with a single pendulum for project Two-axis levelling instrument with a single pendulum for project

1990-09-12

1992-04-28

Turner, Samuel A.

Optics: measuring and testing

Fiducial instruments

Artificial reference

356138, 33291, G01C 912

Patent

active

051081776

ABSTRACT:
A simple structure for providing a level laser beam. A pendulum is suspended by at least two suspension supports along the line parallel to a path of a laser beam emitted from a laser. An optical element is mounted on the pendulum to intercept the laser beam and reflect it along a path orthogonal to the first path. The pendulum will maintain the optical element in a vertical alignment, and accordingly the beam reflected off the optical element will be horizontal.

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