Non-contact thickness measurement for ultra-thin metal foils with differential white light interferometry

A new differential white light interference technique for the thickness measurements of metal foil is presented. In this work, the differential white light system consists of two Michelson interferometers in tandem,and the measured reflective surfaces are the corresponding surfaces of metal foil. Therefore, the measuring result is only relative to the thickness but not the position of metal foil. The method is non-contact and non-destructive, it has the advantages of high accuracy, fast detection, and compact structure. Theoretical analysis and preliminary experimental verifications have shown that the technique can be used to measure the thickness of foil in the range of 1 to 80 μm with accuracy better than 0.08 μm.     

Non-contact thickness measurement for ultra-thin metal foils with differential white light interferometry

A new differential white light interference technique for the thickness measurements of metal foil is presented. In this work, the differential white light system consists of two Michelson interferometers in tandem, and the measured reflective surfaces are the corresponding surfaces of metal foil. Therefore, the measuring result is only relative to the thickness but not the position of metal foil. The method is non-contact and non-destructive, it has the advantages of high accuracy, fast detection, and compact structure. Theoretical analysis and preliminary experimental verifications have shown that the technique can be used to measure the thickness of foil in the range of 1 to 80 μm with accuracy better than 0.08 μm.     

盘电泳凝胶的蛋白酶贴印酶谱显示法

本法是在Ronald C.Roberts(1980)酶谱方法的基础上发展的,先在盘电泳凝胶上分离样品,再在载玻片琼脂糖平板上显示酶谱.我们用此方法来显示枯草杆菌商品酶粉的蛋白酶酶谱.蛋白酶样品经离心、透析后,先作盘电泳分离,电泳毕凝胶直接(或先浸在适当缓冲液中改变凝胶pH)与含酪素的琼脂糖平板贴在一起保温,使凝胶中的蛋白酶水解酪素,平板经固定、染色、脱色处理后,酪素未水解部分被染成蓝色背景,把无色的水解区域作为酶带衬托出来.还与在电泳凝胶上直接显示蛋白酶酶谱的方法作了比较.此外,以贴印法显示的各种酶谱,也存在着酶反应pH与电泳凝胶pH不一致的共同问题,对已有的改变凝胶pH的方法作了较为详细的检查,发现有的不能达到预期的结果,对此提出了相应的措施.