Abstract

Usual holographic imaging of moving objects re quires a high power pulsed laser to deliver sufficient energy on the photographic sensitive emulsion in a short time. We have developed a method for obtaining holograms of moving objects with low power cw lasers. It involves two steps. The first step consists of taking a hologram of a moving object with a relatively high intensity reference beam to match the middle portion of the H-D curve in a short time. The intensity of the object image generated by this hologram is too low to be recognized. The second step is the amplification of the holographic image by the technique of amplified reconstruction. One application of our research can be the imaging of the microstructure of living cells inside the body through an optical fiber. After taking an amplified image hologram, we may phase conjugate the image to the original object side. The image can then be viewed by under a microscope to demonstrate the detailed structure of the object. The image quality and resolution will be discussed.

© 1992 Optical Society of America