Design and construction of an optoacoustic signal processor.

The design and fabrication of a prototype optoacoustic signal processor are described. This system uses a fused silica, folded acoustic path, 340-micro sec. delay line, and operates at a 30-MHz center frequency.

Ultrastructure of Ehrlichia canis.

The ultrastructure of Ehrlichia canis was examined in both pulmonary mononuclear cells and in monocytes cultured from an infected dog. The cytoplasmic inclusions, or morulae, of E. canis consisted of a membrane-lined vacuole-containing elementary bodies which varied in size and number.

Optoacoustic processing of large time-bandwidth signals.

Techniques for achieving time-bandwidth products near 10(4) and storage times up to 1 msec in optoacoustic processors are described. Folded acoustic path designs in two dimensions, and also in three dimensions along the optic axis, were investigated. Design limitations for these devices are presented.