Levelling system with rotating laser beam

Details Levelling system with rotating laser beam Levelling system with rotating laser beam

1986-12-29

1988-01-12

Stearns, Richard R.

Geometrical instruments

Straight-line light ray type

Level

33293, 33DIG21, 356399, G01B 1126, G01C 1506

Patent

active

047181710

ABSTRACT:
A levelling system with a rotating laser beam and an optoelectronic stadia is proposed, in which the height of the laser beam is varied. Several individual measurements are made during a measuring cycle and as a result of the height variation of the laser beam these give different height values. Thus, for example, 20 individual measurements can be used for determining the arithmetic mean, which considerably increases the precision of measurement.

REFERENCES:
patent: 3588249 (1971-06-01), Studebaker
patent: 3771876 (1973-11-01), Ljungdahl et al.
patent: 4031629 (1977-06-01), Paluck
patent: 4035084 (1977-07-01), Ramsay
patent: 4247809 (1981-01-01), Nessel
patent: 4471530 (1984-09-01), Kirven
patent: 4488050 (1984-12-01), Iwafune

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