低对比度测试卡,测试卡由20mm厚的铝板制成。在该铝板上均布1cm孔径圆孔，孔的深度(mm)及对比度(括号内数值%)从0.07mm(035%)到32mm(16%)变化共计19个圆孔。它们分别是:0.07(0.35%)、0.11(0.55%)0.15(0.75%)019(0.95)022(11%)0.26(1.3%)0.32(1.6%)、0.36(1.8%)0.44(22%)052(26%)088(44%06(53%)3668%)148(74%)176(8.8%)214(107%)2.5(12.5%)2.9(14.5%)、32(16%)

序号：ph883049