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Figures (10)

Fig. 1
Fig. 1

Compact, efficient Ho:YLF laser is based on recent successes in using diode lasers to pump other types of solid-state laser.

Fig. 2
Fig. 2

Separate contacts for the lasers in the array enable the control of the output radiation pattern and the compensation of manufacturing nonuniformities among the lasers.

Fig. 3
Fig. 3

In the thermal remote anemometer device, the model is heated locally by a scanning laser beam and cooled by the wind in the tunnel. The thermal image of the model is analyzed to deduce the pattern of airflow around the model.

Fig. 4
Fig. 4

Optical data bus provides for a level of redundancy limited only by the number of wavelengths that the bus can accommodate.

Fig. 5
Fig. 5

Video analog signal divider produces a black-and-white composite video signal based on the color ratio. The device is inexpensive, uses the signal from a standard red/green/blue camera as input, and can be used to produce quantitative thermal images of two-color phosphor coatings.

Fig. 6
Fig. 6

Timing system includes a timing sampler fabricated as part of the integrated circuit to be tested. The timing-waveform generator puts out start and stop pulses, the interval between which is adjusted until it equals the signal-propagation delay to be measured. The counter/timer then measures the interval.

Fig. 7
Fig. 7

Interval counter measures the interval v i from the beginning of each beat pulse to the beginning of the next picket-fence pulse. These measurements establish the times t i of the beginnings of the beat pulses for use in calculations of the stability of the frequency of the beat pulses.

Fig. 8
Fig. 8

Synhronus signal detecor is controlled by timing signals to T0 through. T3 The light-emitting diodes producing the signal to be measured are controlled by timing signal T4 In the application shown, a 4-bit address supplied by a computer determines which one of sixteen light-source/photodiode-detector pairs is to be used at any given moment.

Fig. 9
Fig. 9

Ultrasound pulses would travel through rods to a siliconribbon growth by the dendritic-web process. The rods would return reflections of the pulses to the sonic transducers. The rods would isolate the transducers thermally, but not acoustically, from the hot silicon melt.

Fig. 10
Fig. 10

Flow about a row of turbine blades is computed by iteration of meridional-plane (M) and streamline-surface-of-revolution (S) analysis programs. The rectangular blade shape is schematic only.

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