Abstract: A laser vibrometer for measuring the vibratory characteristics of an object and more specifically, a moving object, has an improved signal to noise ratio due to multiple channels. A laser is split into a plurality of channels and then for each channel split again into a reference beam and a probe beam. The probe beam is directed at the object and the back scattered reflections are collected and compared to the reference beam to determine the vibratory characteristics of the object. The received signals from the multiple channels are different, sequential and non-overlapping.

Abstract: An unattended ground sensor system includes a sensor to produce pixel data from a radiating target within its field of view. The detection of such a target is implemented detectors in the sensor other than those used for imaging. Once a target has been detected, the sensor collects a linear array of pixels data at each sampling period throughout the time interval during which the target is within the field of view of the sensor. The linear arrays of pixels are transmitted to a location remote from the sensor, where they are analyzed to classify and identify the target and an alert is issued to applicable personnel when the classification and identification of the target warrants such.

Abstract: An unattended ground sensor system includes a sensor to produce pixel data from a radiating target within its field of view. The detection of such a target is implemented detectors in the sensor other than those used for imaging. Once a target has been detected, the sensor collects a linear array of pixels data at each sampling period throughout the time interval during which the target is within the field of view of the sensor. The linear arrays of pixels are transmitted to a location remote from the sensor, where they are analyzed to classify and identify the target and an alert is issued to applicable personnel when the classification and identification of the target warrants such.

Abstract: A system for visualizing the solid-liquid interface of a growing crystal in-situ using a modified vertical Bridgman crystal growth method. An infrared source emits radiation which passes through a furnace window, the crystal material and the growth ampoule which are all transparent to the radiation and is picked up by an IR camera focused on the solid-liquid interface. The IR camera produces radiographs of the solid-liquid interface. The system provides in-situ operation by every radiograph being converted into a visible image in real time by the output from the camera fed to an image processor, including a television monitor and a VHS recorder. A feedback means from the image processor controls the parameters of the growth process such as the furnace temperature and the movement of the growth ampoule.