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CS2 Color Scanner
Free Sample Testing
Delta will test your samples and tell you if your application
is a candidate for the CS2 color scanner (or another Delta
color scanning product).
This service is available to anyone with a potential
application. Simply send the samples, along with a business
card (se we can call and get a brief description of the
application) to:
Delta Computer Systems, Inc.
11719 NE 95th Streed, Suite D
Vancouver, WA 98682
Attn: Steve Nylund
If this brochure is more than a year old, please call and
cornfirm our address before sending. Please call (360)254-
8688.
After receiving your samples and discussing the application,
we will test your samples using a CS2 scanner and/or a
spectrometer. Will will then recommend a praticular
configuration for online testing.
Take advantage of the offer today. It's easy!
Delta Computer Systems, Inc., 11719 NE 95th Street, Vancouver, Washington 98682-2444 (360) 254-8688
email@deltacompsys.com http://www.deltacompsys.com
How The CS2 Works
The CS2 measures the difference in reflected light between
two light sources. In its standard configuration, the
reference color is 880-940nm (near-infrared) which is
referred to as the Base color. The second light source is
660nm (red) which is referred to as the Sense color. The
reflected color is measured by turning on the Base and Sense
high intensity LEDs, one color at a time, and reading a
silicon photocell. The amplified information is stored so
that the measured color information will still be present
when the LEDs are off. The LEDs are on for only about 20
microseconds out of the 500 microsecond cycle in order to
reduce power and maximize life.
Once the reflected Base and Sense color amplitudes are
stored, the current or real time-time values are subtracted
from the running averages (running averages are derived
from the minimum color amplitudes) for each color. The
running averages change over time, allowing the CS2 to
automatically adjust to changes in temperature, ambient
lighting, etc., and making periodic recalibration to
compensate for these changes unnecessary.
By comparing the ratio of the Base and Sense colors, a
determination can be made as to when and where a color
deviation occurs. The CS2 can be configured to detect either
a Low or High Ratio deviation. Example applications where
the Low Ratio setting is used include detecting green areas
on carrots, knots on wood and burned cookies, while the
High Ratio setting would be used to detect white ends on
asparagus, some paint applications, eand so on. The default
setting is Low Ratio.
When more sophisticated filtering, thresholds, or limit
algorithms are needed, the CS2 provides an easy interface to
an optimizing computer. In addition to analog inputs to
permit control of the Base and Sense Thresholds, analog
outputs are provided for Base and Sense colors. The outputs
do not provide absolute color information, but provide
relative values that can be processed by an optimizing
computer.
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