激光表演呈现新规模

在高科技竞争的今天，人们对小巧、快捷和经济情有独钟，而激光在这些方面存在的不足使其本来的优势并没有完全发挥出来。尽管如此，在激光器问世40年后的今天，仍有许多对艺术的痴迷者热衷于挖掘激光技术。事实上，目前激光显示／娱乐市场的年销售额还不足1千万美元，但是其支持者们却为激光的精美技艺狂喜不已。     

应用细分，A3打印走“专业”之路

经过20多年的发展演变,激光打印作为整个打印机市场技术变革最快的领域,以其卓越的打印速度和质量已成为打印市场的主流产品。激光打印在快速的发展过程中表现出两个显著的特点:一是激光打印的新技术、新产品层出不穷;二是激光打印逐渐走上应用细分,最突出就是A4与A3幅面打印的     

用激光从硅表面剥离氢原子

美国一研究小组实现了科学家们长期以来的目标：利用激光破坏某些分子的化学键。他们利用激光代替加热的方法将氢原子从硅表面剥离开来，这是计算机芯片和太阳能电池制造过程中的一个关键步骤。     

Structural Description of Polyaromatic Nucleus in Residue

The proton nuclear magnetic resonance spectroscopy （1H-NMR）, the synchronous fluorescence spectrometry （SFS） and the ruthenium ions catalyzed oxidation （RICO） method were used to determine the chemical structure of polyaromatic nucleus in Oman residue fractions. The results of 1H-NMR analyses showed that the average numbers of aromatic rings in the aromatics, resins and asphaltenes units were 3.2, 5.6 and 8.2, respectively. SFS was used to investigate the distribution of aromatic rings in residue fractions, the main distribution range of aromatic rings in aromatics, resins and asphaltenes were 3 4 rings, 3--5 rings and more than 5 rings, respectively. The aromatic network in residue fractions was oxidized to produce numerous carboxylic acids. The types and content of benzenepolycarboxylic acids, such as phthalic acid, benzenetricarboxylic acids, benzenetetracarboxylic acids, benzenepentacarboxylic acid and benzenehexacarboxylic acid disclosed the condensed types of aromatic nuclei in the core. The biphenyl fraction （BIPH）, the cata-condensed fraction （CATA）, the peri-condensed fraction （PERI） and the condensed index （BCI） were calculated based on the benzenepolycarboxylic acids formed. The results implied that there was less biphenyl type structures in all residue fractions. The aromatics fraction was almost composed of the cata-condensed type system, and the asphaltenes fraction was wholly composed of the peri-condensed type system, while in the resins fraction co-existed the two types, herein the peri-con- densed type was predominant over the cata-condensed type. Based on the analytical results obtained in the study, the components --aromatics, resins and asphaltenes -- were given the likely structural models.     

激光扫描仪协助设计高速赛车

在Evernham Motorsports公司,激光扫描仪正在协助该公司建立一条生产快速赛车的新生产线。在汽车比赛的一段路速中甚至1/100s的差异就是冠军与亚军之分。如果在车体设计上做一些微小变化可能会对赛车性能产生巨大影响。赛车研究小组目前正尽最大努力优化汽车外形设计,以使其空气动力学性能达到最佳状态。但直到最近还没有精确检测汽车形状的方法。     

新型涂料增稠剂的化学成分鉴定

本文用红外光谱法对一种新型涂料增稠剂进行了化学成分鉴定,其主要成分为羟丙基甲基纤维素与蒙脱土。     

激光起爆与点火系统中光纤连接器

介绍了激光起爆与点火系统中光纤连接器的原理、种类、技术特性及损耗，并对激光起爆与点火系统中光纤连接器的研制动向进行了概括，最后得出一些结论。