Chinese Optics Letters, 2020, Vol. 18, Issue 2, pp.
Multi-reference lens-less Fourier-transform holography with Greek-ladder sieve array
Xie Jing, Zhang Junyong, Pan Xue, Zhou Shenlei, Ma Weixin
- Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences
- Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences ShangHai, CN 201800
Lens-less Fourier-transform holography has been actively studied because of its simple optical structure and its single-shot recording. However, low-contrast interferogram between the reference and object waves limits its signal to noise ratio. Here, multi-reference lens-less Fourier-transform holography with Greek-ladder sieve array is proposed in experiment and demonstrated effectively to improve the signal to noise ratio. The key technique in our proposed method is a Greek-ladder sieve array, which acts as not only a wave-front modulator but also a beam splitter. With advantages of the common path, single shot, and no need for lens, this system has enormous potential in imaging and especially in extreme ultraviolet and soft X-ray holography.