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Line scan camera

Manufacturing systems often require surface inspection to detect flaws and contamination that render a product unsuitable for sale. Line scan cameras provide higher reliability, increased resolution, and significantly faster dam transfer rates at a lower cost relative to two-dimensional area video cameras. Line scanning cameras have found a number of applications, ranging from document inspection to automated device inspection for quality control purposes. Automated inspection systems of surfaces for defects typically utilize line scan cameras which capture images of the surface under inspection. The line scan camera is designed to read a series of object images in a linear pattern. The term "scan" refers to the method by which each pixel of a charge coupled device (CCD) array is electronically polled to resolve an image into decipherable data. The term "line scan" means that the resulting image is in fact a linear trace of points across a line, which runs across the object. A typical line scan camera comprises a series of discrete optical sensors arranged in a line to form a linear sensor array. An optical arrangement allows the linear array of optical sensors to form a one dimensional image of a line portion of the object. By scanning the camera relative to the object, so that the line portion moves across the object, a two dimensional image of the object is constructed.

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