The Xenon-Rub C-Mount lenses are optimized
in accordance with the sensitivit of modern
image sensors up to 1 / 1. 8“ (9mm). These lenses
are the perfect trade-off between price and
perfor-mance: B having a practice-oriented
speed between 2. 2 and 2. 3, a ver high optical
performance is achieved.
In the USA: + 1 631 761-5000
Outside the USA: +49.671.601.387
As small and robust as
high definition can be.
October 2017 VISION SYSTEMS DESIGN www.vision-systems.com 22
like this one are 16K with a maximum line
rate of 70 KHz, and a maximum throughput of 3. 5 GB/second, they need a data-split-ting function so the camera can distribute
data to multiple host computers simultaneously, if needed.
These cameras also need high-speed data
transmission to keep up, and the Piranha XL
includes a recently developed high speed
data transmission protocol, Camera Link
HS, to improve speeds.
Variations of color technologies
Some applications might require color, but
not necessarily true color. In applications
such as pharmaceutical, security, electronics, and food, the main consideration to use different colors is to discriminate different characteristics of the objects. In these cases, a low-cost bilinear color camera can be a cost-effective solution. A third color
can be interpolated from neighboring pixels in cameras with bilinear
architectures (Figure 5).
In a security application inspecting the undercarriage of automo-
biles (Figure 6) the bilinear camera architecture used provides a color
image that is not truly what we would see with the naked eye, however,
it does provide enough contrast to be able to view the various under-
Quadlinear cameras and future developments in color technology
Quadlinear cameras can pair color vision with other technologies to
visualize object characteristics that are not visible to the human eye or
monochrome cameras. These cameras are especially powerful for applications where the object contains some non-visible spectral component
such as a solar panel, banknote, and glass inspections.
Color line scan cameras can also be used as multi-channel mono line
scan cameras. This is a clever way to use the color camera. For example,
assume there are three defect items. Scratches, dust, and muras need to
be identified and they are visible in red, green, and blue light respectively.
Then all that is needed is to apply the red, green, and blue lights
together to illuminate the object at the same time and process the red,
green, and blue channel images separately. Some color line scan cameras can allow each channel exposure time to be controlled independently, so that the user is able to grab high dynamic range monochrome
images with them. This is a color-as-mono application, and these applications require high color pureness.
The color filters of current trilinear cameras are based on dye or
pigment and have spectral cross-talk among color channels. The red,
green, and blue more or less mix together. To address this challenge,
a new dichroic filter with minimum crosstalk, is under development.
Once the technology is complete, it will be beneficial for color-as-mono applications.
Of the progress made over the last two decades in sensors, resolutions,
speeds, interfaces, and multichannel technologies, perhaps speed is the
greatest. Current models image at least seven times faster than models
from twenty years ago. Demand for color imaging continues to increase
and no doubt will fuel the drive for faster, cheaper color line scan cameras well into the future.
Figure 6: An automotive undercarriage image scanned by a bi-color line scan camera.