Lens design targets flat-panel inspection
Checking pixels on large LCDs requires adaptation of lenses to linescan cameras.
Manufacturers of large flat-screen LCD-based displays must ensure that no inactive or dead pixels are present before the panels are assembled into finished computer terminals or television displays. To do this inspection as cost-effectively as possible, LCD manufacturers are using very large 12k × 1 CCD imagers coupled with custom-built lenses.