1-1
1
Overview
Chapter 1: Overview
The IV-S20 compact image sensor camera is equiped with a CCD image sensor, which captures square
pixels in full range. Employing this state-of-art device, it can be used to pick up high contrast images at high
speed.
It is also easy to interface to a personal computer and a programmable controller, and it can be used in a
variety of production lines such as those for electrical, electronic, semi-conductor or liquid crystal parts as
well as for food, chemical, cosmetics, and other production lines.
1-1 Features
[1] Features of the CCD camera
(1) Arrangement of the square pixels
The vertical and horizontal pixel aspect ratio is 1:1, so there is no need for image correction. This
allows maximum precision and processing speed.
(2) Full pixel reading (progressive scan)
The IV-S20 employs a full pixel reading system which scans every horizontal lines on the CCD in
order. This system does not suffer from reduced image resolution which is caused by the
conventional NTSC interlaced system which only reads half the lines in each frame.
- Comparison of capturing moving objects image
(3) Random shutter
The IV-S20 shutter operation can be triggered by an external signal or by the CCD. It can be used
to mesure moving object.
(4) Reading full and partial images
Since the IV-S20 can be used to capture just the part of the image needed for image processing, it
can read images at very high speeds.
(5) CCD trigger
The IV-S20 samples a part of the CCD (which can be set to any position with according to item ),
and it will starts shutter operation when value of the area being monitored exceeds 50%. With this
function, there is no need for an additional photo sensor or proximaty sensor. Since the IV-S20 can
set the CCD triggering position for each item being processed, it can shorten the time needed to
change the items being processed on a production line.
(6) The C mount module and back plane focus can be adjusted
Since the IV-S20 uses a standerd C mount module for installing the lens, it can be used to adjust the
back plane focus and is convenient for use with a fixed focus lens or for proximaty shots.
Conventional NTSC interlaced system
Progressive scan system
512
480
Full line
Image signal
Odd line
Even line
Even line
Odd line
1
1.28
CCD pickup with rectangular pixels
1
1
Pixel
CCD pickup with square pixels
Full image reading
Partial image reading
480 lines
(approx. 33 ms)
120 lines
(approx. 8 ms)
Item 1
Moving direction
Window for triggering
Item 2
Moving direction
