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针对远距离数字离轴全息系统,分析了系统中本地参考光入射角度应满足的条件,给出了简便的设计依据,并进行了实验验证。首先简要分析了远距离数字离轴全息成像系统的原理,然后从全息图数字记录和频谱分离两个方面,详细分析了本地参考光入射角度与光电探测器像素大小、目标光角度之间的关系。在此基础上,建立了数字离轴全息实验装置,根据目标和CCD探测器的参数,按照分析得到的设计依据对参考光入射角度进行了设计。实验结果表明该设计依据简单、适用性好。
For long-distance digital off-axis holography system, the conditions that the local reference light incident angle should meet in the system are analyzed. The simple design basis is given and the experiment is validated. First of all, the principle of long-distance digital off-axis holographic imaging system is briefly analyzed. Then from the aspects of digital recording and spectrum separation of hologram, the relationship between the local reference angle of incidence and the pixel size and target light angle of the photodetector is analyzed in detail . On this basis, a digital off-axis holographic experimental setup is established. According to the target and the parameters of the CCD detector, the incident angle of the reference light is designed according to the designed design. Experimental results show that the design based on simple, good applicability.