We report what is to our knowledge the first volume-holographic optical imaging instrument with the capability to return three-dimensional spatial as well as spectral information about semitranslucent microscopic objects in a single measurement. The four-dimensional volume-holographic microscope is characterized theoretically and experimentally by use of fluorescent microspheres as objects.

Photogalvanic effect sPGEd or anomalous photovoltaic effect is a transport phenomenon producing high electric fields s,100 kV/cmd in ferroelectrics. PGE plays an important role in holographic-grating recording and was recently demonstrated for optical actuation and as high-voltage power supply. In this paper we demonstrate PGE generating highvoltage electrical pulses in atmosphere to apply this...

The capabilities of photorefractive crystals as media for holographic interconnections in neural networks are examined. Limitations on the density of interconnections and the number of holographic associations which can be stored in photorefractive crystals are derived. Optical architectures for implementing various neural schemes are described. Experimental results are presented for one of the...

We describe the three-dimensional holographic optical disc system for application as read-only memory. Several systems design issues are discussed including imaging optics, storage density, readout rate, and the alignment servo system. We demonstrate 40 bits=lm surface density and pixel-matched holographic data readout from a 12 cm disc spinning at 600 RPM.

Holographic storage has the potential to become a digital data storage technology with fast readout and high density. Computer users have come to expect, however, that data retrieved from their storage devices will be retrieved error-free (with a probability of error <10−12). In both conventional storage devices and holographic data storage, achieving this degree of reliability involves a good ...