Konica Minolta Non-Contact 3D Digitizer Range7 - Manual (Page 22)

20
Other Information
n Measuring Principles
<Basic Principle>
The RANGE7/5 uses the light sectioning method to emit a horizontal stripe light through a cylindrical lens to the object.
The reflected light from the object is received by the CMOS sensor, and then converted by triangulation into distance
information.This process is repeated by scanning the stripe light vertically on the object surface using a Galvano mirror, to
obtain a 3D image data of the object.
<High-Speed Image Processing Circuit>
The stripe light is scanned on the CMOS image plane at one horizontal line per frame, and the CMOS is driven so that the
block readout start position is shifted one line per frame. Approximately 1400 frames are acquired.
• Frame rate: 600 frames/sec.
• Block readout: 350 lines
The output signal from the CMOS sensor is then converted into a digital signal, which is then subjected to digital signal
processing. The processed data is finally transferred to the computer via the USB interface.
CMOS Sensor
Galvano
Scanner
Lazer
Diodo
CPU
Driver
CPU Data Bus
A/D
FPGA
Frame
Memory
USB Driver USB
<Time center of gravity and Space center of gravity>
With this instrument, 3D images are obtained by calculating the time center of gravity of each pixel of the CMOS sensor. With
this method, compared to the space center of gravity, use of the time center of gravity reduces the influence of sensitivity
variations of the CMOS sensor pixels and variations in object brightness.
Frame interline
Transfer CCD
Galvano
Scanner
CPU
A/D
Clock Generator
FIFO
Host I/F
DSP
Frame
Memory
Laser
Diode
Driver
CPU Data Bus
Galvano mirror
Emitting lens
Laser beam
Light-receiving lens
Object
CMOS sensor