REAL-TIME HOLOGRAPHIC IMAGING WITH A BACTERIORHODOPSIN FILM

We investigate the potential of high-resolution and large space-bandwi dth product holographic lensless imaging by using bacteriorhodopsin fi lm as a real-time material under He-Ne laser illumination. The imaging reflectivity is found to be linearly proportional to the reading ligh t intensity when the hologram is under short laser pulse stimulation. The time response of the recording process is characterized by two exp onentially increasing functions that are related to the intensity modu lation of the illumination. An image resolution of 80 lines/mm and a s pace-bandwidth product of similar to 2 x 10(6) are obtained. (C) 1995 Optical Society of America