Abstract
Computational ghost imaging (CGI) presents a new way to solve the problem of extended depth of field (DOF), which has been studied for a long time. The application of correlation theory confirms that a plane light source can be used to avoid the limitation of DOF in CGI. Results from experiments where real objects are imaged by CGI between 0.3 m and 1.2 m verify that images are consistent in quality. This confirms that CGI is not affected by DOF and can be used to improve the accuracy of integral and microscopic imaging.
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