{"product_id":"dot-distortion-target","title":"Dot Grid Targets","description":"\u003cp\u003eDot Distortion Targets are used for lens distortion measurement, image calibration, machine vision setup, and optical system verification. Each variant is organized as a single Model option that includes material, size, dot size, dot spacing, dot array, useful area, and accuracy.\u003c\/p\u003e\u003cp\u003eModels are available in optical glass and aluminum formats, with dot sizes and dot spacing selected for different field sizes and calibration requirements.\u003c\/p\u003e","brand":"Fulteng - Optomechanical and Components","offers":[{"title":"Optical Glass, 50x50mm, Dot Size 0.3mm, Dot Spacing 0.5mm, Useful Area 32.25x32.25mm","offer_id":49214117249247,"sku":"DOTMTX-OPG-50x50-D0.3-S0.5","price":34.54,"currency_code":"USD","in_stock":true},{"title":"Optical Glass, 70x70mm, Dot Size 0.5mm, Dot Spacing 1.0mm, Useful Area 52.5x52.5mm","offer_id":49214117282015,"sku":"DOTMTX-OPG-70x70-D0.5-S1.0","price":124.37,"currency_code":"USD","in_stock":true},{"title":"Optical Glass, 100x100mm, Dot Size 1.0mm, Dot Spacing 2.0mm, Useful Area 85x85mm","offer_id":49214117314783,"sku":"DOTMTX-OPG-100x100-D1.0-S2.0","price":134.35,"currency_code":"USD","in_stock":true},{"title":"Optical Glass, 150x150mm, Dot Size 1.5mm, Dot Spacing 3.0mm, Useful Area 133.5x133.5mm","offer_id":49214117347551,"sku":"DOTMTX-OPG-150x150-D1.5-S3.0","price":359.22,"currency_code":"USD","in_stock":true},{"title":"Optical Glass, 200x200mm, Dot Size 2.5mm, Dot Spacing 5.0mm, Useful Area 182.5x182.5mm","offer_id":49214117380319,"sku":"DOTMTX-OPG-200x200-D2.5-S5.0","price":483.99,"currency_code":"USD","in_stock":true},{"title":"Optical Glass, 260x260mm, Dot Size 3.0mm, Dot Spacing 6.0mm, Useful Area 243x243mm","offer_id":49214117413087,"sku":"DOTMTX-OPG-260x260-D3.0-S6.0","price":605.82,"currency_code":"USD","in_stock":true},{"title":"Optical Glass, 300x300mm, Dot Size 5.0mm, Dot Spacing 10.0mm, Useful Area 265x265mm","offer_id":49214117445855,"sku":"DOTMTX-OPG-300x300-D5.0-S10.0","price":755.54,"currency_code":"USD","in_stock":true},{"title":"Optical 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