CAJ | 학술논문

提出了一种利用相位拼接技术以扩大数字全息成像视场的方法。通过平移被测物体，记录物体各子区域的离轴全息图，然后利用菲涅尔再现算法得到部分物体相位像。在此基础上，采用均化误差算法对各子区域的相位像进行拼接，并对拼接相位像进行去倾斜处理，得到无畸变的扩展物体相位像。最后，利用USAF 1951反射型分辨率板对该方法进行实验验证。结果表明该方法能够克服CCD阵列大小对成像视场的限制，在保证成像分辨率的同时，有效扩展了数字全息的成像或测量范围。
제출료일충이용상위병접기술이확대수자전식성상시장적방법。통과평이피측물체，기록물체각자구역적리축전식도，연후이용비열이재현산법득도부분물체상위상。재차기출상，채용균화오차산법대각자구역적상위상진행병접，병대병접상위상진행거경사처리，득도무기변적확전물체상위상。최후，이용USAF 1951반사형분변솔판대해방법진행실험험증。결과표명해방법능구극복CCD진렬대소대성상시장적한제，재보증성상분변솔적동시，유효확전료수자전식적성상혹측량범위。
A method to enlarge the field-of-view in digital holography imaging based on sub-aperture phase stitching tech-nique is proposed in this paper. The part information of an object is recorded by the off-axis digital holographic interferometer and the part phase image of the object is picked up by means of the Fresnel diffraction algorithm. Then the phase profiles in all the sub-regions are stitched together with the error averaging method,while the tilt of the stitched map are calculated and elimi-nated to obtain the orthoscopic profile of the whole surface. It was validated by the reflective resolution plate USAF 1951. The proposed method breaks away from the limits of the area of the CCD and expands the digital holography imaging field-of-view while the resolution is kept in the same level as that of the traditional methods.