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INTRODUCTION TO LASERCHECK
Overview
Lasercheck is designed to perform high speed, accurate, non-contact measurements of surface roughness. A
built in visible laser diode emits a laser beam from the bottom of the gage illuminating the surface beneath
it. After striking the surface, the laser light is reflected and scattered back into the Lasercheck detection
system. The overall intensity and distribution of the reflected and scattered light is measured, digitized by
Lasercheck electronics, and then Ra roughness is calculated for the illuminated area. This Ra value is then
displayed on the LCD screen of the Lasercheck control unit. The Lasercheck Windows display and control
software can be used to display the real time Ra values in graphical and numeric format along with
statistical parameters.
Lasercheck has been designed for a nominal height standoff of 1.055 inch
±
0.01 inches from the
measurement surface. Motions and vibrations within that tolerance range are monitored continuously and
reflectance and scatter distribution are normalized and corrected during every measurement cycle to ensure
accurate results. Surfaces are positioned 1.055 inches below the gage allowing non-contact measurements of
the surface to be made.
Measurements can be performed by manual pushbutton operation, or continuous high-speed measurements
controlled by Windows software, or fully automated high speed on-line measurements triggered by external
signals and the Windows software. At the end of a measurement sequence, the user is provided options for
performing additional measurements, saving the current measurements or exiting the measurement
sequence. When measurements are saved an ASCII file format can be created for reading into a variety of
spreadsheet and analysis software packages.
