NaCl溶液补偿非平衡热光关联成像系统

UNBALANCED THERMAL LIGHT CORRELATION IMAGING SYSTEM COMPENSATED BY NACL SOLUTION

热光无透镜鬼成像系统要求物光和参考光两个光路的光程相等,当不满足此条件时,成像质量就会下降。实际应用中热光关联成像系统两臂长度相等的条件极为苛刻,很难满足。笔者设计了一种补偿式热光关联成像系统的实验方案,利用NaCl溶液补偿物光和参考光两个光路的光程差。实验结果表明,将一定浓度的NaCl溶液放在光程较长的光路中,可以有效补偿非平衡系统的光程差,从而获得待测物体清晰的关联像。

Thermal optic lensless ghost imaging system requires an equal optical path between the object light and the reference light. If this condition is not met, the image becomes blurred. In practical application the condition where two arms have the same length is extremely strict and is hard to be satisfied. In this paper, an experimental scheme of compensated thermal optical correlation imaging system is designed, where the difference of two optical paths is compensated by NaCl solution. Experimental results show that NaCl solution with certain concentration can compensate the optical path difference of the unbalanced imaging system as to achieve a clear image of the detected object.