常用激光光源的发展概况

由于重视可靠性、效率和经济性 ,通信、医学和制造业市场正在改变激光产业的状况。客户正慷慨地奖赏和赞同他们评价的制造商 ,但冷落那些只欣赏技术拼凑的制造商。同时投资者开始希望新公司能反映商业现实 ,而非技术希望和梦想。在这样的情况下 ,半导体二极管激光是个福音 ,但在某种意义上对其他激光制造商则是件坏事。当具有很好可靠性的小型高效全固体激光光源起动时 ,也开始与其大型激光制造同行分享市场份额。二极管抽运激光器已统治了许多新应用 ,高亮度二极管也慢慢渗透进某些专家曾认为是二极管抽运激光器独家领地的领域。在某些工业…     

激光全色显示技术

激光全色显示技术是蓝色激光器实现突破以后得以实现的新型技术.介绍了激光全色显示技术的原理,分析了激光全色显示技术国内外发展状况,概述了几种主要的激光全色显示系统及其扫描成像的特点.最后分析了国内激光全色显示技术产业化进程及发展趋势.     

激光焊接机的焊接点显示方法

激光焊机使用的激光器如CO2激光器（输出激光波长λ=10．6μm），钕玻璃激光器（λ=1．06μm）．YAG激光器（λ=1．06μm）波长属于红外区，人的肉眼是无法看见的，也就不知道光束在空间的确切路径，这对于焊接是十分不方便的。因此我们采用了正面显示方法，使激光精确地对准需要焊接的部位，并使这个焊接点显示出来，以便于实施焊接。     

Laser display technology

The promise of producing a cathode-ray-tube type of display with essentially unlimited screen size accounts for much of the current interest in laser displays. The first display that used a laser light source to generate a television image was operated in late 1964. Since that time, a number of experimental laser display systems have been demonstrated, including versions capable of reproducing color television images and displaying computer-generated information. Adequate light modulation and scanning techniques are presently available, but the design of broadly applicable equipment still awaits the development of more efficient multicolor lasers.     

US display industry on the edge

When an entire system can be built on the periphery of a flat-panel display, a nation's ability to manufacture those displays becomes vital to the survival of its industries. The author discusses the state of the market for this technology and emphasises the US's position in relation to the rest of the world, in particular, Japan, Korea, Taiwan, and Europe. The problems facing the flat panel display industry in the US are discussed     

激光投影显示色彩管理系统

本文提出了一种适用于激光电视的新的颜色显示管理方法,该方法建立了激光三基色颜色显示与荧光粉三基色颜色显示之间的色度转换关系,不仅扩大了色彩显示的色域,而且实现两种色彩管理系统的相互兼容,该方法对于LED显示等宽色域显示系统的颜色管理,也有积极的借鉴意义。     

Laser soldering for chip-on-glass mounting in flat panel display application

Chip-on-glass (COG) mounting of area array electronic packages was attempted by heating the rear surfrace of a contact pad film deposited on a glass substrate. The pads consisted of an adhesion (i.e., Cr or Ti) and a top coating layer (i.e., Ni or Cu) was heated by an UV laser beam transmitted through the glass substrate. The laser energy absorbed on the pad raised the temperature of a solder ball which was in physical contact with the pad, forming a reflowed solder bump. The effects of the adhesion and top coating layer on the laser reflow soldering were studied by measuring the temperature profile of the ball during the laser heating process. The results were discussed based on the measurement of reflectivity of the adhesion layers. In addition, the microsctructures of solder bumps and their mechanical properties were examined.     

Laser repair of active matrix display drive circuits

A system based on an Nd:YAG laser operating at 1.064 mu m has been set up to allow the repair of polycrystalline silicon thin film transistor (poly-Si TFT) drive circuits for use with active matrix liquid crystal displays.<>     

A new longitudinal display mode for ceramic electrooptic devices

A new longitudinal mode of operation for the lanthanum-modified lead zirconate titanate (PLZT) ferroelectric electrooptic ceramics is described. Potential applications include displays and shutters.     

Promises, hopes, and hyperbole: adoption of new informationtechnologies

Much of the talk about the information revolution so far is just that-talk. A provocative mix of promises, hopes and hyperbole, some of it will come true over time. Most of it will not. Technology is moving at ever-increasing speeds, and predictions about technology are accelerating even faster. Yet practical needs and wants rarely keep pace. The purpose of this paper is to explore the disparity between the promises and possibilities of the information revolution. It examines the factors that traditionally affect new technologies, and the role of end-users in affecting outcomes     

A new 3-D display method for 12-lead ECG

A new three-dimensional (3-D) 12-lead electrocardiogram (ECG) display method is presented which employs a 3-D rectangular coordinate system to display the 12-lead cardiac electric signals in two 3-D graphs. The 3-D graph consists of a temporal axis representing the time domain of the cardiac signals, a spatial axis representing the lead positions, and an amplitude axis representing the voltages of the cardiac signals. The six horizontal plane leads and the other six frontal plane leads were displayed in two 3-D graphs, respectively. The voltages of the cardiac signals were represented in rainbow-like colors. Cubic interpolation was employed to insert interconnecting points between neighboring leads on each plane and to smooth the surface of the 3-D ECG graphs. The 3-D ECG graphs of a normal subject, a patient with myocardial infarction, and a patient with left bundle branch block were presented in this paper. This new display method could not only be used as a complementary display method to the 12-lead ECG, but also provide physicians with an overall integral view about the spatial distribution of the cardiac signals.