6 April 2017 An analysis of printing conditions for wavefront overlapping printing
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Abstract
Wavefront printing for a digitally-designed hologram has got attentions recently. In this printing, a spatial light modulator (SLM) is used for displaying a hologram data and the wavefront is reproduced by irradiating the hologram with a reference light the same way as electronic holography. However, a pixel count of current SLM devices is not enough to display an entire hologram data. To generate a practical digitally-designed hologram, the entire hologram data is divided into a set of sub-hologram data and wavefront reproduced by each sub-hologram is sequentially recorded in tiling manner by using X-Y motorized stage. Due to a lack of positioning an accuracy of X-Y motorized stage and the temporal incoherent recording, phase continuity of recorded/reproduced wavefront is lost between neighboring subholograms. In this paper, we generate the holograms that have different size of sub-holograms with an overlap or nonoverlap, and verify the size of sub-holograms effect on the reconstructed images. In the result, the reconstructed images degrade with decreasing the size of sub-holograms and there is little or no degradation of quality by the wavefront printing with the overlap.
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Y. Ichihashi, K. Yamamoto, K. Wakunami, R. Oi, M. Okui, T. Senoh, "An analysis of printing conditions for wavefront overlapping printing", Proc. SPIE 10127, Practical Holography XXXI: Materials and Applications, 101270L (6 April 2017); doi: 10.1117/12.2251285; https://doi.org/10.1117/12.2251285
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