Abstract
A simple, flexible and programmable line-scan CCD camera is presented in this paper. This camera is designed for measurement purposes such as dimension and position measurements. Camera enables implementation of various signal-processing algorithms as well as usage of various types of CCD sensors.
Highlights
CCD line-scan cameras are used in measurements e.g. for dimension measurement applications where the resolution of cameras with area CCD sensors is not sufficient and the whole image of the measured object is not required
In both cases the signal from the CCD sensor is in the camera only pre-processed using a sampler (CDS – Correlated Double Sampler) and an amplifier or an ADC
Our goal was to develop a simple digital linescan camera for measurement purposes that could work without additional peripheries
Summary
CCD line-scan cameras are used in measurements e.g. for dimension measurement applications where the resolution (number of pixels) of cameras with area CCD sensors is not sufficient and the whole image of the measured object is not required. Following figures show block diagrams of two common line-scan camera concepts:. In both cases the signal from the CCD sensor is in the camera only pre-processed using a sampler (CDS – Correlated Double Sampler) and an amplifier or an ADC. The signal-processing and measurement algorithms are implemented in some external unit such as PC. Further we wanted the camera to be re-configurable so it would be easy to change the signal-processing algorithm. Easy application of various types of CCD sensors was required so it will be possible to use the most suitable sensor for different tasks
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