Automatic compensator for compensating collimation error due to

Details Automatic compensator for compensating collimation error due to Automatic compensator for compensating collimation error due to

1985-12-10

1987-07-21

Rosenberger, R. A.

Optics: measuring and testing

Angle measuring or angular axial alignment

Apex of angle at observing or detecting station

356148, G01C 106

Patent

active

046814388

ABSTRACT:
An optical plummet mechanism for compensating an error due to an inclination of a surveying instrument comprises a first pendulum suspended in the instrument body interior, a second pendulum suspended in a perpendicular relation to the first pendulum, a first reflector provided on the first pendulum for reflecting light incident in the direction of a collimation axis of a collimation lens in the direction of a substantially horizontal collimation axis lying in the plane of swinging of the first pendulum, and a second reflector provided on the second pendulum and being a double reflecting surface reflector for reflecting light incident in the direction of a collimation axis lying the the plane of swinging of the first pendulum in the direction of a vertical collimation axis. Collimation errors due to inclination of the instrument body in two directions, i.e., back-and-forth direction and left-to-right direction, can be simultaneously automatically compensated for by the pendulum actions of the first and second pendulums in perpendicular directions.

REFERENCES:
patent: 3220297 (1965-11-01), Baker et al.
patent: 4142800 (1979-03-01), Paget

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