reference n. 1.(對委員、審查人等的)委托;委托項目[范圍]。 2.說到,論到,提到。 3.參考;參考書;附注,引證;基準,依據(jù);關(guān)系。 4.(關(guān)于人品、能力等的)查詢,咨詢,詢商;可供查問的人;證明人,介紹人;(身份、能力等的)證明書,介紹書,服務(wù)經(jīng)歷,鑒定書。 5.參看符號〔如 asterisk[*e], obelisk ?, section§, parallel‖, paragraph π等〕 (=reference marks)。 the commission's terms of reference 委員會的職權(quán)。 R- was made to me. 提到了我;所指的是我。 You make no reference to your plan in your letter. 你信里沒有提到你的計劃。 a book of reference=a reference book 參考書。 Who are your references 你的證明人都是誰? bear reference to =have reference to. give a reference to 提到,介紹。 have reference to 和…有關(guān)系。 in reference to 關(guān)于。 load one's pages with references (在著作中)引用大量參考資料[文獻]。 make reference to 說到,涉及,提到;參考;查問;介紹。 with reference to 關(guān)于。 without reference to 不管,不論(without reference to age or sex 無論男女老少)。 vt. 加注,附加注腳;給(書等)列出參考書目[注明資料來源]。
The basic principle of digital holography is that , by replacing the ordinary films with ccd , the hologram of the object and the reference waves can be obtained and reconstructed by numerical computing 數(shù)字全息的基本原理是用光敏電子元件(如ccd )代替普通照相記錄介質(zhì),獲取物體和參考光的干涉全息圖,然后用數(shù)字計算方式再現(xiàn)。
( 2 ) the serious recording limitations due to the finite size and resolution of ccd are discussed detailedly . it ' s shown that the setup for recording hologram with spherical reference wave can make full use of the spatial bandwidth of ccd ( 2 )著重討論了ccd參數(shù)對記錄條件的限制,給出了數(shù)字全息術(shù)所能記錄的物體的最大尺寸與記錄距離之間的關(guān)系,指出用球面參考光波記錄全息圖可以更為有效地利用ccd的有限帶寬。
This method has some characters : during recording of the transmissive holograms the holographic grating placed in front of the holographic plate closefittingly is used as a spectroscope . the transmissive wave is served as the object wave and the diffraction wave through the holographic grating or the deflective reflect wave produced by the silicon slice is served as the reference wave , therefore the hologram is named as self - reference image hologram . the recording results are the off - axis holograms and the twin images can be separated successfully 在記錄透射型全息圖時,將全息光柵緊貼置于記錄干板之前,而光柵起到了分光的作用,直透波作為全息圖的物光波,參考光是物光通過光柵后產(chǎn)生的衍射波;記錄反射型全息圖時將硅片置于記錄干板之后,利用反射硅片產(chǎn)生離軸參考光,因此系統(tǒng)僅需一束照明光束,參考光來自物光本身,因此稱之為自參考像全息圖。
The holographic wavefront recording process records the interference pattern of the object and the reference waves , and thus forms the hologram , which simultaneously records the information about the amplitude and phase of the object waves ; the holographic wavefront reconstruction , by means of the diffracted waves , can reconstruct the original object wave from the hologram illuminated by lights 全息波陣面記錄將物光和參考光以干涉條紋記錄成全息圖,此全息圖同時記錄了物光波的振幅和相位;全息波陣面重現(xiàn),就是用光波照射全息圖,通過光的衍射,從全息圖中再現(xiàn)出原始物體的光波。
Chapter 4 : the influence of different phase - shifting angle of reference wave in recording , of the phase - shifting error and of the quantization error on the quality of the reconstructed image is investigated respectively in two - step phase - shifting inline digital holography . and an effective method of eliminating the phase - shifting error is presented , in which the summation of the intensity bit errors of the reconstructed image is taken as an evaluation function for an iterative algorithm to find the exact phase - shifting value . the feasibility of this method is demonstrated by computer simulation 通過數(shù)值分析不同相移角的選取對再現(xiàn)像的強度誤差的影響,發(fā)現(xiàn)再現(xiàn)像強度誤差依賴于記錄時相移角的選取,當相移角在一定范圍內(nèi),其再現(xiàn)像的強度誤差相對較小;提出了一種有效消除相移誤差的新方法,并將其應(yīng)用于二步同軸相移數(shù)字全息,對此進行了計算機模擬,得到了很好的結(jié)果,證明該方法對于相移誤差的消除是很有效的;對量化誤差所作的數(shù)值模擬發(fā)現(xiàn),當信號被量化成8比特( bit ) ,即256個灰度級以上,量化噪聲的影響相對較小。