Figure 3 | Scientific Reports

Figure 3

From: Light source optimization for partially coherent holographic displays with consideration of speckle contrast, resolution, and depth of field

Figure 3

Experimental results to demonstrate holographic display performance using various light sources. We compare four light sources: a laser diode (LD), an optimally engineered LD (optimal LD), a light-emitting diode (LED), and an optimally engineered LED (optimal LED). (a) The apodization and relative SPD of each light source. (b) Holographic reconstruction results using corresponding light sources. The photographs present qualitative evaluation of resolution and SNR of holographic displays. The speckle contrast (C) is measured by cropping a small area of focused region. We present digitally synthesized RGB color images to explore how speckles appear in a full-color display. Each color channel image is captured using single light source demonstrated in the first row. Tropical fish (royalty-free 3D model from Turbosquid) is used for the experiment.

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