MACHINE VISION SYSTEMS FEATURE
The rise of the CMOS sensor in industrial vision cameras
Julie Busby, director at Multipix Imaging, explains how CMOS sensors are becoming the technology of choice for many of today’s industrial vision cameras
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CMOS sensors are now found in many of the latest industrial vision cameras
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MOS sensor technology has undergone significant upgrades in recent years, in many cases surpassing the abilities of the CCD sensor. Their high speeds (frame rate) and resolution (number of pixels), their low power consumption and, most importantly their improved noise characteristics, quantum efficiency, and colour concepts have opened them up to applications previously reserved for CCD sensors.
VERY HIGH FRAME RATES The strong price/performance ratio with these sensors make CMOS sensors increasingly attractive for industrial machine vision. In particular, the very high frame rates that can be achieved, almost without any compromise in image quality, are one of the primary highlights of the current generation of CMOS sensors. This year will be an exciting one
for modern cameras and camera technology due to the increasing number of new CMOS sensors reaching the camera market. Those sensors come with impressive specs in terms of image quality and frame rate, defining a new category of value for money. Sony, the largest manufacturer of CCD sensors so far, has recently announced plans to discontinue CCD sensors by 2026, and will then concentrate on continued CMOS technology. For the first time, we will see the whole range of standard resolutions, from VGA to five megapixels and above, to be covered by CMOS technology. This technology will become relevant for all existing and new applications in machine vision as well as in applications away from the factory floor, such as medical or intelligent traffic systems.
“This year will be an exciting one for modern cameras and
camera technology due to the increasing number of new CMOS sensors reaching the camera market.”
USB 3.0 Beyond that it is also becoming clear that the USB 3.0 interface in combination with the new CMOS sensor technology will fuel fast growth for USB 3.0, due to the perfect match in terms of performance. For camera manufacturers, this brings some very exciting technical challenges. The new sensors must be integrated into the ever decreasing camera footprint, currently around 29mm x 29mm. These sensors may require additional electronics and other hardware that must fit into the housing as well. Once you have those sensors in a small form factor you want to make use of the performance they offer. That means beyond Gigabit Ethernet, USB 3.0 is a ‘must-have’ interface. Lastly, the
camera must optimise the image quality of these new CMOS sensors to fit the
market’s expectations. The outcome will be small, fast and image quality perfect cameras, that will offer end users more value than ever before.
Multipix
www.multipix.com T: 01730 233332
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