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Image Sensors Overview
The ATD image sensor portfolio is perfectly positioned for today and the tasks of tomorrow. Our product range covers Machine-Vision- , Surveillance- , Automotive- or Medical solutions.
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Image Sensor Technology Overview
CMOS Image Sensors
CMOS (Complementary Metal Oxide Semiconductor) is a mainstream semiconductor technology, used to fabricate a wide range of integrated electronic circuits. Image sensors based on CMOS technology can take full advantage of the fast pace of innovation in the semiconductor industry. Some of these advantages are reduction in feature size, increased operating frequencies, and integration of complex components. In addition, due to the advances in Very Large Scale Integration (VLSI), System on Chip Integration (SOC), and automated high-volume production CMOS sensor technology has improved its imaging performance.
Rolling- vs. Global Shutter Sensors
Rolling shutter is a method of image capture in which a still picture (in a still camera) or each frame of a video (in a video camera) is captured not by taking a snapshot of the entire scene at single instant in time but rather by scanning across the scene rapidly, either vertically or horizontally.
This means, not all parts of the image of the scene are recorded at exactly the same instant. This produces predictable distortions of fast-moving objects or rapid flashes of light. This is in contrast with "global shutter" in which the entire frame is captured at the same instant.
While for some applications sensors based on the above pixel architectures provide good results’ their “rolling shutter” behavior may lead to major distortions in other applications. This is evident when pulsed illumination is used or fast moving scenes are to be captured. For these applications, AWAIBA provides the solution with its unique intellectual property on truly global shutter pixel architectures.
CCD Image Sensors
Please contact our sales team for Sony CCD Image Sensors:
Linescan Image Sensors
As opposed to area scan image sensors, line scan image sensors acquire only a single line of pixels at a time. This permit’s in imaging of fast moving objects to concentrate the illumination source on a fine line, achieving much higher illumination levels compared to illumination of a whole area. Thus line scan image sensors can operate at much shorter integration times. Further line scan image sensors can read out high resolution images with much higher bandwidth compared to area scan image sensors, since there is no need to access a single line out of a full matrix for readout as in area scan image sensors. Another advantage of line scan sensors is in the inspection of endless goods, since the data can be processed directly on a line by line basis we can treat high resolution data with reduced memory requirement. Any motion blur, due to jitter in the transport speed, can be compensated by adequate triggering.
InGaAs Image Sensors
InGaAs photodetectors are based on the band-to-band absorption mechanism, allowing detection in the SWIR spectrum [0.9µm; 1.7µm] with an optional visible extension down to 0.4µm.