KEYENCE LS-7600 - Manual (Page 17)

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Chapter 1 Getting Started
■ Principle of Measurement
The high-intensity GaN green LED radiates light, which will be changed into uniform
parallel light through the special diffusion unit and collimator lens and emitted to the
target in the measuring range. Then the shadow image of the target will appear on the
HL-CCD (high-speed linear CCD) through the telecentric optical system. The output
incident signal of the HL-CCD will be processed by the DE (digital edge-detection)
processor in the controller and CPU. As a result, the dimensions of the target will be
displayed and output.
A/D
conversion
CPU
DE
processor
A/D
conversion Frame
memory TFT LCD
monitor
Control input
Control output
BCD output
Analog output
RS-232C interface
HL-CCD for
measurement use
Telecentric optical
system
Target
Receiver Transmitter
Controller
Collimator lens
Special diffusion unit
High-intensity GaN green LED Beam splitter
CMOS image
sensor
Video output