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Target Dot Grid Assembly High Conrast Target Assembly ideal for Vision/Optical Systems. Known Dot Grid Array Patterns have accurate diameters (±0.003mm) with accurate Dot Center to Dot Center Positions (±0.003mm). Target is an assembly with Low Reflection Chrome looking through 0.063” clear glass bonded to a white backing substrate, .125” ceramic or glass.Pattern: Six (6) dot arrays:(1) 0.100” diameter dots on 0.500” centers. Three rows of eight dots.(2) 0.080” diameter dots on 0.400” centers. Three rows of seven dots.(3) 0.060” diameter dots on 0.300” centers. Three rows of nine dots.(4) 0.040” diameter dots on 0.200” centers. Three rows of thirteen dots.(5) 0.030” diameter dots on 0.150” centers. Three rows of seventeen dots.(6) 0.020” diameter dots on 0.100” centers. Three rows of twenty five dots. Click here to download drawing Show more