Lens-less Imaging of Pollen Grains

摘要

Digital inline holography usually uses single pinhole illumination. Experimental results using a 3×3 pinhole array for imaging pollen grains are compared to single pinhole illumination. The pinhole array can be used to extend the field of view and increases the intensity. The imaging quality using an array illumination was improved by moving the object plane closer to the pinholes. By using a laser diode with short coherence length the interference of reflections that occur at surfaces inside the setup was removed.