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Usually built-in mono CODEC chip product line to eliminate the wind noise with optical filter and notch filter (notchfilter), but also new natural reproduction can be used to eliminate the wind noise was the elimination of the bass sound technology components, In two adjacent set up between the microphone can also be the effect of 3 D stereo surround sound technology and through small speakers can also export high-quality / large volume of the voice volume (LoudSound) technology. Oki Electric in preparation for September 2008 start of the bulk supply of chips. General on the frequency modulator can be used analog and digital two programmes, Figure 2 for a simple analog frequency on the realization of circuits, it is the principle of the oscillation frequency VCO to achieve FM. First, the input signal after VCO signal mixing with the vibration and frequency and give the difference frequency signal; these signals through high-pass optical filter, the filter out low-frequency components, high frequency components can be transferred to the amplifier channel to. Since analog circuits some of the inherent defects, such as less interference, lower accuracy, and so on, so this method on the frequency stability and reliability are poor. In quadrature modulation mode, AD9857 through pin PDCLK / FUD on the data input to provide synchronized clock all the way, for synchronous I / Q two-way data input. I / Q two-way data sharing 14 bit data lines, so PDCLK the clock I should be a separate road or Q-data rate 2 times, I / Q data time-sharing into the DEMUX-chip solution for the reuse of parallel I / Q two-way data, they will be followed after two interpolation optical filter.
作者:S-Blog

在ColorVision 的副总裁 Brian Levey 带领下，ColorVision策略性地收购了多种颜色管理产品，和不断的投资在科技的研究及发展，以改良和提炼这些产品。 在2000 年10月，纽约市的PhotoPlus博览会中，出了经由上述研究所诞生的下一代mc7 荧幕标准─全新全数码, 七个感应器, 长edge filter的 CRT 荧幕SpyderTM。
ColorVision 的生产技术不断在富创意的工业上为颜色管理带来突破，同时亦为创作影像的专业人士和喜爱颜色的用家提供屡获殊荣的颜色控制方案。透过与Adobe等世界知名的颜色权威，The PANTONE 公司的市场推广联盟，Colorvision获得史无前例的业绩增长 。PANTONE 是市场推广联盟用来“联名”推出SpyderTM产品，作为PANTONE COLORVISION 家庭成员的一部份。
管井edge filter孔隙率是表征管井edge filter进水性能的指标．其概念及其确定对管井计算和管井设计有着非常重要的理论和实践意义，迄今，管井edge filter孔隙率被定义为edge filter骨架管的孔隙率，似无疑问，其实不然，我国管井工程的理论和实践均证明这一定义是值得讨论的。
从双层结构出发研究了一种由多块不同的单周期光子晶体组合而成的多层结构的滤波器，论述了这种optical filter的工作原理，研究表明这种结构适于制作带通、窄带通过、带阻、宽带带阻、高通以及其它各种性能的optical filter。实验和理论研究的结果相一致。
研制了一种新颖的单镜头双波长红外图像比色测温系统来实时检测焊接温度场。此系统的主要特点是采用一种双波长的红外dichroic filter从焊缝正面摄取双波长红外图像。双波长dichroic filter的具体结构形式是用两个不同波长的半圆dichroic filter拼接成一个整圆dichroic filter，其两个半圆的波长值根据比色测温的要求而设计，研制的双波长dichroic filter的波长分别为0．805μm与0．8950μm。此测温系统的CCD摄像机从焊缝正面摄取焊接热图像时，将双波长dichroic filter的接缝对准焊接熔池中心，就可以在一幅图像的两半边同时取得两种波长的焊接温度场红外图像。由于双波长滤江片的中间接缝很窄，可以将接缝两边对称点上的两个波长的信息作同一温度下的双波长信息来进行比色测温计算，从而求出近熔区化的焊接温度场，并可推算出含溶化区的焊接温度。此系统的优点是结构简单，实用性好，适用于焊接现场。

作者:S-Blog