Patent ID: 6166802
Filing Date: 2000-12-26
Classification: G01C

Abstract:
A beam detector for detecting a reference point established by a laser reference plane, said beam detector comprisinga beam detector housing,a beam receiving section mounted in said housing for detecting a beam position and said beam receiving section having a predetermined zero position,a display section for displaying the beam position relative to said predetermined zero position indicator, said display section including an upward indicator, a downward indicator and a reference position indicator for indicating said predetermined zero position in order to adjust the housing up or down dependant upon activation of said upward indicator and said downward indicator by said beam position until the beam position is at the reference position indicator indicative of the predetermined zero position,a cursor slidably mounted on the housing for indicating the reference point and being movable in a perpendicular direction with respect to the laser reference plane on the detector housing, anda scale located on a side of said housing with said cursor being slidable along said scale for indicating shifted distance from the predetermined zero position to said reference point.