Abstract

We investigate the potential of high-resolution and large space–bandwidth product holographic lensless imaging by using bacteriorhodopsin film as a real-time material under He–Ne laser illumination. The imaging reflectivity is found to be linearly proportional to the reading light intensity when the hologram is under short laser pulse stimulation. The time response of the recording process is characterized by two exponentially increasing functions that are related to the intensity modulation of the illumination. An image resolution of 80 lines/mm and a space–bandwidth product of ~2 × 106 are obtained.

© 1995 Optical Society of America

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