optical contrast ratio 中文意思是什麼

optical contrast ratio 解釋
光對比度
  • optical : adj 眼的；視覺的；視力的；幫助視力的；光學（上）的。 optical activity 【物理學】旋光性。 an optic...
  • contrast : n 1 對照，對比；（對照中的）差異。2 對立面，對照物；【攝影】反差。3 【修辭學】對照法。vt 使對照，...
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. Characteristics of electro - optical x - ray image intensifiers for medical electrical equipment - determination of the contrast ratio and veiling glare index

    醫用電氣設備.電光x射線圖象增強器的特性.第6部分:對比率和雜光指數測定
  2. Medical electrical equipment - characteristics of electro - optical x - ray image intensifiers - part 6 : determination of the contrast ratio and veiling glare index

    醫用電氣設備.光電x射線影像增強器特性.第6部分:對比度及炫光系數的測定
  3. Medical electrical equipment. characteristics of electro - optical x - ray image intensifiers. part 6 : determination of the contrast ratio and veiling glare index

    醫療用電氣設備.電光x射線圖象增強儀特性.第6部分:對比率和雜光指數的測定
  4. Medical electrical equipment - characteristics of electro - optical x - ray image intensifiers - part 6 : determination of the contrast ratio and veiling glare index iec 61262 - 6 : 1994 ; german version en 61262 - 6 : 1994

    醫療電氣設備.光電x射線圖象增強器特性.第6部分:對比
  5. 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。
  6. The tests of e - o applications by our flux ktp has been realized, the results showed : optical waveguides fabricated by using an ion - exchange process, which have an exchange - ion concentration depth profile and refractive - index profile, is close to a complementary error - function distribution, optical homogeneity and device thermal stability is much better. amplitude modulation switch formed by our flux ktp has the contrast ratio of 150 : 1 and insert loss is 2. 5 % at 1064 nm. high quality optical pulse with 1 ns width was cut successfully by using an e - o modulator from a laser pulse with 50 ns width, this modulator had run for three years, and the crystal did n ' t blackened, it showed our low conductivity flux ktp can endure high modulation voltage for a very long time

    Ktp晶體的電光應用試驗表明：用離子交換法製作的電光波導，其離子交換濃度、折射率變化符合餘弦誤差函數，光學均勻性以及器件的溫度穩定性較好；製作的強度調制電光開關，消光比為150 ： 1 ，對1064nm激光的插入損耗為2 . 5 ；製作的電光調制器用於激光脈沖整形試驗，從脈沖寬度50ns的激光脈沖削出脈寬1ns的高質量光脈沖，該電光開關經過長達三年多的使用，沒有出現晶體變黑現象，說明本實驗的低電導率ktp晶體能夠耐受長時間的調制電壓。
  7. Two wedge interferometers are designed that the thickness of one is higher than the other. so when the incident coherent light through the interferometers can acquire two fringe patterns which having space shift, but the incident incoherent light only result in consistent intensity signal. through a differentiating amplifier, two signals subtract which can eliminate noise of background and result in higher contrast ratio fringe signals. this method largely improves the system and the ability of detection. the spacing of line fringes is a function of incident laser wavelength, by analyzing, we can extract the wavelength of incident laser. the optical unit analyzing and results also simulated with matlab

    當背景光入射時，直接穿過干涉儀，僅發生強度的衰減，在兩個探測平面上產生幅度基本一致的灰度信號，通過差分放大器，相消為零，從而抑制了背景干擾。當激光信號入射，穿過干涉儀時受到調制，在探測平面上產生干涉條紋。通過所設計的存在平均厚度差的雙楔形干涉儀，兩路干涉條紋圖案出現相對移位：在兩個探測平面對應的位置上，一路出現亮紋，另一路出現暗紋。
  8. Methods of test for paints - optical tests on paint films - determination of contrast ratio opacity of light - coloured paints at a fixed spreading rate

    塗料試驗方法.塗料膜的光學試驗.第d11部分:淺色漆在固定噴塗速度下對比度
  9. Between all kinds of optical - switches, mems optical - switches draw attention of all over the world because they have large contrast ratio

    在光開關眾多種類種，微機械光開關以其消光比大的特點備受世人矚目。
  10. The reflection, contrast ratio and polarization direction are calculated in the wavelength of 633nm and in wide band wavelength, which represent the applications in the optical information process and the projection display

    分析計算了633nm以及寬波長下液晶的反射率、對比度以及偏振光的工作角度。獲得了用於信息處理以及用於投影顯示的液晶工作曲線。
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