Level sensor

Details Level sensor Level sensor

1992-03-04

1994-03-08

Evans, F. L.

Optics: measuring and testing

By alignment in lateral direction

With light detector

33293, 356152, G01B 1126

Patent

active

052932214

ABSTRACT:
A level sensor detects a vertical position of a laser beam emitted from an electronic leveling apparatus and comprises a photo-sensing unit having a predetermined vertical length for detecting the laser beam, a plurality of marking indices arranged on a side edge of a housing of the level sensor at a predetermined pitch along the vertical direction of the laser beam, and analog display unit having a plurality of display devices one for each of the marking indices for displaying a change in an incident position of the laser beam along the vertical direction by selective activation of the display devices.

REFERENCES:
patent: 4674870 (1987-06-01), Cain et al.
patent: 4676634 (1987-06-01), Petersen
patent: 4752539 (1988-06-01), Vatter

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