3
3 - 1
No. 99MBC071A
This Display Unit is provided with many useful functions that can be
customized according to the user's needs.
This chapter describes these functions and key operations.
DISPLAYS AND KEY
OPERATIONS
3.1 Outline of the Operation Modes
3.1.1 Measurement Principle
In order for the user to understand the measurement principle of the LSM, the following
paragraphs describe about the system block diagram, segments (measurement positions) and
measurement interval (measurement time).
3.1.1.1 Overview
Unlike light emitted from natural sources, a laser provides extremely fine, rectilinear beams
which do not diffuse (coherent light beams).
Using the properties of the laser beam, the Mitutoyo Laser Scan Micrometer (LSM) moves a
scanning laser beam over the workpiece and determines its dimensions by measuring the
duration in which the beam is obstructed by the workpiece.
RS
Photoelectric element
(reset signal generation)
ttt
Foot switch
Segment
selection circuit
Gate Edge signal
Edge signal
Counter
RS-232C
Data display
Keyboard
CPU
Motor driving pulse
Clock pulse
ROM RAM
I/O analog
interface
Option I/F
RS
Amplifier
Condenser lens
Workpiece
Reception
device S
Motor Colimator lens
Laser power source Semiconductor laser
Polygon mirror
Polygon mirror
MP
Emission unit Reception unit
