CAJ | 학술논문

为了解决现有数字全息显微系统中高分辨率与大记录视场无法同时兼得的问题,提出了一种在不牺牲分辨率的前提下拓展数字全息显微记录视场的方法.该方法中运用了波长不同、偏振态不同的四路相互不相干的探测物光,同时探测被测样品四个相邻的不同区域,并使这四束探测物光分别与其相应的参考光相干,在记录面上同时记录下含有被测样品不同区域信息的复合全息图.将获得的复合全息图经过频谱变换和数字滤波,分别重构出所记录区域的振幅和相位分布.最后通过图像拼接和图像融合技术,可实现接近原记录视场四倍的大视场数字全息显微记录.该方法在测量过程中无需移动记录装置、光源和被测样品,单次曝光即可实现,实验结果验证了本文所提方法的可行性.
위료해결현유수자전식현미계통중고분변솔여대기록시장무법동시겸득적문제,제출료일충재불희생분변솔적전제하탁전수자전식현미기록시장적방법.해방법중운용료파장불동、편진태불동적사로상호불상간적탐측물광,동시탐측피측양품사개상린적불동구역,병사저사속탐측물광분별여기상응적삼고광상간,재기록면상동시기록하함유피측양품불동구역신식적복합전식도.장획득적복합전식도경과빈보변환화수자려파,분별중구출소기록구역적진폭화상위분포.최후통과도상병접화도상융합기술,가실현접근원기록시장사배적대시장수자전식현미기록.해방법재측량과정중무수이동기록장치、광원화피측양품,단차폭광즉가실현,실험결과험증료본문소제방법적가행성.
@@@@We present a method to expand the record field of view in the recording process of digital holographic microscopy systems without loss of resolution. A series of incoherent sub-holograms covering different regions of sample can be recorded in a single frame of the CCD synchronously based on wavelength and polarization multiplexing. The reconstructed images can be obtained with information about different parts of the sample. Thus, the synthetic reconstructed image with a wider field can be achieved by image stitching and fusion technology without any form of scanning. Based on single-exposure working principle, this approach can be used for real-time recording of the dynamic samples without moving CCD, point source and tested samples. Experimental results show that the final synthetic image produced by the system in this paper can be achieved to be close to four times as large as the original record field of view with original resolution.