optical variable 中文意思是什麼
optical variable
解釋
光學變星-
The design of the transmissive variable optical attenuator
透射型電可調光衰減器的設計 -
The last part of the thsis presents a novel fast response digital variable optical attenuator. this device is driven by two electromagnetic driving units rather not stepper motors. a wide attenuation ( 40db ) was fully digitized and can be set by a certain number of driving pulses
論文最後針對現有數字可調光衰減器均由步進電機驅動，體積龐大，造價高昂且速度緩慢的缺點，利用微反射單元設計了一種高速數字式可調光衰減器。 -
The stamps feature the tsing ma bridge, a major hong kong landmark that has won international acclaim for its architectural design. while maintaining the inaugural format as per their first issue, the four stamps produce different printing effects. variations are made by using optical variable ink for the texts of " $ 10, hong kong, china ", or by the modification of the background colour
郵票仍是首日發行時的青馬大橋香港的一個主要地標，舉世矚目的一座跨海吊橋分別只在於郵票上以不同顏色的幻變油墨印刷的文字： $ 10中國香港及hongkong ， china ，又或郵票的底色有別于首日發行時的顏色。 -
The first two denominations ( $ 100 and $ 500 ) had been put into circulation in december 2003. additional security features have been incorporated in the new series. these include denomination numerals in optical variable ink, a fluorescent machine readable barcode, a four - millimetre - wide windowed thread and iridescent images
首兩種面額（ 100元及500元）已於2003年12月推出。新系列鈔票加入新的防偽特徵，包括變色反光油墨銀碼、機讀螢光條碼、 4毫米寬開窗式保安線及反光圖案。 -
In general, the thesis covers the following aspects : first, in accordance with the property of variable tuning optical attenuator ( voa ), which is analyzed and discovered through diffraction theory, selected block plate and made attenuator, and achieved satisfactory effect by experiment in light transportation circuit
針對可調型機械擋光衰減器的擋光特點，從衍射理論的角度分析和發現該器件的衰減特徵，並根據該特徵選擇擋光片，製作了衰減器。在傳輸光路上試用，獲得了較好的效果。 -
Based on the spectral irradiance measured with the sun - atmosphere ultraviolet spectrum radiometer ( sauvs ) developed by the institute of atmosphere physics and the changchun institute of optics and fine mechanics, chinese academy of sciences, measuring the direct and scatter irradiance spectrum of ultraviolet waveband which arrives in beijing global surface, giving a method of retrieving the aerosol optical depth ( aod ) and put up with primary results that exponential function can fit the retrieval results according to its visibility, putting forth different coefficients and functions on variable visibility, also giving a primary analysis on the aod in dust - storm day and some contrast between sun - day and dust - storm day, analyzing the ratio between scatter and total irradiance, and its relationship with atmosphere mass and total atmosphere optical depth, lastly contrasting with the survey results by aeronet beijing station, the results of retrieval is in reason, this work gives some help in researching the co - effect of aerosol - radiance - climate and makes preparation for further survey on the radiance characteristics of dust
利用中國科學院大氣物理研究所與長春光學精密機械研究所合作研製的太陽?大氣紫外光譜輻射計（ sauvs ） ，測量到達北京地表的太陽直接和散射紫外光譜輻射，導出了大氣氣溶膠的光學厚度。初步結果表明：北京紫外波段大氣氣溶膠的光學厚度在絕大部分情況下隨波長的增加而單調減小，用指數函數可以較好地擬合反演結果，統計得到了三個水平能見度狀況下擬合函數的系數值和公式表達式；初步分析了揚沙、浮塵、沙塵暴天氣條件下氣溶膠光學厚度的特點，並與一般晴朗天氣條件下的氣溶膠光學厚度特點做了比較分析；分析了太陽紫外譜輻射中散射輻射與大氣質量、大氣總光學厚度的定性關系和定量表達式；最後與全球氣溶膠監測網路（ aeronet ）北京站的資料做比對，表明反演結果基本合理。 -
Electro - optical curves for lc cells have been analyzed and it has been shown mat a large attenuation range and a shallow attenuation slope can be achieved simultaneously for a variable optical attenuator based on a parallel - aligned lc cell with an appropriate surface anchoring strength. as compared with the existing liquid crystal - based voa structure ( using two cascaded lc cells with a particular material ), the present structure is simple and has no special requirement for the lc materials
提出了基於弱錨定平行排列液晶盒的可變光衰減器（衰減范圍大、衰減曲線下降平緩以保證調節精度） ，與己有液晶型可變光衰減器結構（選用特定液晶材料、兩個液晶盒級聯結構）相比較，本論文提出的基於弱錨定平行排列液晶盒的可變光衰減器結構簡單，同時對于液晶材料無特殊要求。 -
We had fabricated the variable optical attenuator of mmi structure with ridge wave - guide structure and also studied the reactive iron etching of silicon. at last, we tested the variable optical attenuator and draw some conclusions. after testing, we can draw a conclusion that the technology parameter of the device is ideal
在分析y分支和多模干涉器型（ mmi ）的光學衰減器結構的基礎上，採用脊形波導結構製作了mmi結構的可變光學衰減器，並對硅的刻蝕技術進行了研究和探討，最後對制得的器件進行了測試研究。 -
In this paper, we research on the storage density of optical variable devices storage system, and we study characters of letter, image and coding storage by experiments, the experiment results are given and discussed
本文系統地研究了在光變圖像上進行光存儲的技術及其系統的存儲能力，通過實驗研究了文字、圖像和編碼存儲的特點，分析並給出文字、圖像和編碼存儲的實驗結果。 -
Based on the theoretical expression of the average intensity in the fourier transforming and imaging optical system with variable aperture, an algorithm is developed to change the intensity data versus the aperture radius into the bessel - fourier - transform - and - the - inversion of a function of the height - height correlation function. three samples of gaussian correlation are used for the experimental demonstration
在理論分析和實驗測量中，我們採用了變孔徑的傅立葉變換和成像系統，由所得到的像面光強的解析式，建立了將平均光強隨孔徑的數值變化關系轉化為正逆傅立葉變換對，從而恢復出表面的高度?高度相關函數。 -
Variable optical attenuator is one of the key devices in wavelength - division multiplexing systems
可變光學衰減器（ voa ）是波分復用系統的關鍵器件之一。 -
Chromatic dispersion measurement of multimode graded - index and single - mode optical fibers by spectral group delay measurement - variable aperture method in the farfield
利用光譜組延遲測量法進行多模漸變折射率光纖和單模光纖的色散測量.遠場可變孔徑法 -
The content of the thesis is classified into three parts. the first part summarizes the modern tecchnoligies for optical switches and variable optical attenuators, analyzes the pros and cons of the techniques involved
第一部分主要研究了現有光開關及可調光衰減器的實現技術，對各種技術的優點及缺點進行了分析，並對光開關及可調光衰減器技術現狀進行了概述。 -
The most visible security feature is the triangle printed with optical variable ink beside the chip of the smart id card
當中最顯眼的是在晶片邊旁以光學變色油墨印製的三角形。 -
At first we analyzed the optical network joins the partial wave - length variable pitch point to the network performance improvement and on how reasonable placed in wdm optical network switching nodes in order to achieve better network performance to improve the effectiveness of the study
本文首先分析了光網路加入部分波長可變節點對網路性能的改善，並對如何在wdm光網路中合理放置轉換節點，以達到較好改善網路性能的效果進行了研究。 -
This thesis presents a study on the non - silicon based mems optical switch and variable optical attenuator. by fully utilizing the available micro - machining capability, we developed a series of devices based on electrical discharge machining technique
在閱讀國內外相關文獻的基礎上，利用實驗室現有條件，製作了一系列器件，並對器件進行了性能測試與分析。 -
To match the sheetlet design, the optical variable ink printed on the text ( $ 10 hong kong, china ) of the definitive stamp has been changed from the current gold and blue colours to green and red colours
為配合小型張的整體設計，小型張上以幻彩變色油墨印刷的文字（ $ 10中國香港hongkong ， china ）已由現時的金色及藍色改為綠色及紅色。 -
So in this paper, we propose a method of optical variable devices storage
因此，光變圖像信息存儲是可以實際應用的技術。 -
Denomination numeral in optical variable ink the colour of the denomination numeral shifts between gold and green when the banknote is viewed at different angles
變色反光油墨印刷銀碼從不同角度斜看鈔票時，鈔票銀碼呈金綠兩色相互交替 -
To further highlight the tourism theme, a stamp sheetlet reproducing all the 21 stamps of the 1999 hong kong definitive series is issued. printed with a purpleviolet optical variable ink, the stamps when viewed from different angles show two different colours
為凸顯"旅遊"的主題，香港郵政特意把全套21枚一九九九年通用郵票重新印行，並用上紫色紫紅色的幻彩變色油墨，使顏色可以隨賞玩角度的不同而轉變。
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