Fourier transform holography with extended references using a coherent ultra-broadband light source.
We demonstrate a technique that enables lensless holographic imaging with extended reference structures, using ultra-broadband radiation sources for illumination. We show that this 'two-pulse imaging' approach works with one- and two-dimensional HERALDO reference structures, and demonstrate that the obtained spectrally resolved data can be used to improve the signal-to-noise ratio in the final image. Intensity stitching of multiple exposures is applied to increase the detected dynamic range, leading to an improved image reconstruction. Furthermore, we show that a combination of holography and iterative phase retrieval can be used to obtain high-quality images quickly and reliably, by using the HERALDO reconstruction as the initial support constraint in the iterative phase retrieval algorithm. A signal-to-noise improvement of two orders of magnitude is achieved compared to the basic HERALDO result.
Vasco T
VT
Tenner
Kjeld S E
KS
Eikema
Stefan
S
Witte
D000465:Algorithms; D003198:Computer Simulation; D003460:Crystallization; D005583:Fourier Analysis; D006696:Holography / Q000379:methods*; D007091:Image Processing, Computer-Assisted; D008027:Light; D017785:Photons; D059629:Signal-To-Noise Ratio