It introduces the method of modulated light subtracting infrared radiation of atmosphere and background as well as the method of phase - lock - loop detecting feebleness signal 采用光路差分調(diào)制的方法實(shí)時(shí)扣除背景紅外輻射,并采用鎖定放大器進(jìn)行微弱信號(hào)的檢測(cè)。
The special light beam modulator is a disc that rotates at high speed , symmetrically along its diameter is respectively arranged a slit and a small hole , the slit is used to modulate light beam , the small hole is used to the synchrosystem and measure speed of modulator 該調(diào)制器為一高速旋轉(zhuǎn)圓盤(pán),其上沿軸向刻制細(xì)縫,在圓盤(pán)對(duì)稱(chēng)位置開(kāi)小孔;細(xì)縫用于調(diào)制光束,小孔用于系統(tǒng)同步及調(diào)制器轉(zhuǎn)速測(cè)定。
The photoabsorption properties of three kinds of br molecule films ( the wild - type br , the chemical enhanced br , the gene - variant br ) are investigated by measuring their absorption spectrum . using the gene - variant br film as a light - modulator , by the experiment of write - readout image and the analysis of image contrast , the light - modulated property of the modulator is studied . the relationship between wavelength of the modulated light and response time of the modulator is discussed emphatically 本論文概述了細(xì)菌視紫紅質(zhì)分子結(jié)構(gòu)、功能特性及研究發(fā)展的歷史與現(xiàn)狀,介紹了目前已有的和潛在的一些重要應(yīng)用,通過(guò)對(duì)吸收光譜響應(yīng)特性的測(cè)試研究了三類(lèi)br分子薄膜(野生型,化學(xué)修飾型,基因修飾型)的光吸收特性,通過(guò)圖像的記錄/讀取實(shí)驗(yàn)及圖像的對(duì)比度分析探討了基因改性型br分子薄膜的光調(diào)制特性,著重研究作為一個(gè)光調(diào)制器件對(duì)調(diào)制波長(zhǎng)和調(diào)制時(shí)間的響應(yīng)特性。
In this paper they study a position - detecting system based on microprocessor and psd ( position sensitive detector ) . the method is as follows : when the ac - signal from psd which is illuminated by modulated light source passes through an active band - pass analog filter , it filters the ac signal which represents the object light source . then the dc - converter circuit transforms it into dc - signal which is used to calculate the position 這一系統(tǒng)采用的方法是通過(guò)對(duì)位置敏感探測(cè)器psd受到調(diào)制目標(biāo)光源照射后輸出的模擬交流信號(hào)進(jìn)行有源帶通濾波,提取出代表目標(biāo)光源的調(diào)制頻率成份,再將該信號(hào)轉(zhuǎn)變?yōu)橛脕?lái)參與位置解算的直流信號(hào),然后選用單片機(jī)組成硬件電路,對(duì)直流信號(hào)進(jìn)行采集處理并與計(jì)算機(jī)建立通信,把數(shù)據(jù)送入計(jì)算機(jī)進(jìn)行位置解算,分析判別目標(biāo)光源和psd器件的相對(duì)位置。