A High-Eccentricity Low-Mass Companion to HD 89744.

HD 89744 is an F7 V star with a mass of 1.4 M middle dot in circle, an effective temperature of 6166 K, an age of 2.0 Gyr, and metallicity &sqbl0;Fe&solm0;H&sqbr0;=0.

Real-time optical correlation.

A real-time coherent optical correlator is described that uses the Itek PROM as a recyclable filter recording medium. Operation of a joint transform correlator is compared to a conventional Vander Lugt system. Experimental results are shown for the joint transform system, including demonstrations of the effects of target alignment and scale and the correlation of random bit rasters for signal processing applications.

Imaging Characteristics of the Itek PROM.

This paper discusses advances in the fabrication, operation, and performance of the Itek PROM (Pockels readout optical modulator). Devices of high optical quality have been made and evaluated. Measurements of MTF and sensitivity under various conditions are presented.

Real Time Optical Processing with Bi(12)SiO(20), PROM.

Use of the Itek PROM, a Pockels effect real time electrooptic image modulator, in optical processing systems is discussed. Applications include an incoherent-to-coherent converter for word/character recognition systems; on-line Vander Lugt type Fourier plane filters for real time cross correlation; a block data composer for holographic memories; and an active storage array for a parallel optical digital computer.

Mirror blank testing by real-time holographic interferometry.

This paper describes an application of real-time holographic interferometry to the testing of unworked mirror blanks. The thermal test of a 70-cm diam, fused silica, eggcrate mirror blank and the mechanical test of a 28-cm mirror blank are included.