本文選題：全息 + 離軸全息��； 參考：《激光與光電子學進展》2017年06期

【摘要】：粒子場離軸濾波全息技術是減少背景噪聲影響、改善粒子場再現(xiàn)像質量的有效方法。濾波器尺寸與再現(xiàn)粒子像密切相關,合適的濾波器尺寸有利于粒子的識別和測量。解析分析了高通濾波器尺寸、4F系統(tǒng)前焦距及粒徑對圓形粒子離軸濾波全息再現(xiàn)像強度分布的影響規(guī)律,數值模擬了不同尺寸的高通濾波器對相同粒徑粒子全息再現(xiàn)像強度分布的影響,并開展了離軸濾波全息實驗。研究結果表明,高通濾波器可以有效提高粒子圖像的對比度;粒子尺寸不變時,濾波器尺寸越小或4F系統(tǒng)前焦距越大,再現(xiàn)粒子像強度分布越均勻,同時邊界梯度越大;濾波器尺寸和4F系統(tǒng)前焦距恒定時,粒子越大,再現(xiàn)粒子像內部逐漸呈現(xiàn)明暗相間變化的圓環(huán),同時粒子邊界越來越清晰。
[Abstract]:Particle field off-axis filter holography is an effective method to reduce background noise and improve the image quality of particle field reconstruction. The size of the filter is closely related to the reconstructed particle image, and the appropriate size of the filter is helpful for particle recognition and measurement. The influence of front focal length and particle size on the intensity distribution of circular particle off-axis filter holographic reconstruction image is analytically analyzed. The effects of high-pass filters of different sizes on the intensity distribution of holographic reconstruction images with the same particle size are numerically simulated, and off-axis filtering holographic experiments are carried out. The results show that the high pass filter can effectively improve the contrast of particle image, the smaller the size of the filter is or the larger the front focal length of 4F system is, the more uniform the intensity distribution of the reconstructed particle image is and the larger the boundary gradient is. When the size of the filter and the front focal length of the 4F system are constant, the larger the particle size is, the larger the particle size is, and the larger the particle size is, the larger the particle size is, and the larger the particle size is, the larger the particle size is.
【作者單位】： 湘潭大學材料科學與工程學院;西北核技術研究所強脈沖輻射環(huán)境模擬與效應國家重點實驗室;
【分類號】：O438.1;TN713

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1 王燕燕;張耀舉;莊友誼;;高通濾波器在熒光分子顯微中的超分辨[J];陜西科技大學學報(自然科學版);2010年06期

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本文編號：1822517