NASA NTRS · 19890000575
Shutter For VPPA-Welding Vision System
Abstract
Conceptual electro-optical shutter subsystem regulates intensity of light entering video camera from variable-plasma-pulse-arc weld in process. Camera part of video system that enables welding technician to obtain better view of weld bead and puddle in light of arc. Electro-optical shutter opened during low-illumination viewing intervals near zero crossings of welding current, preventing overloading of video camera.
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Lirette, Murray J.. 1989-11-01. Shutter For VPPA-Welding Vision System. https://ntrs.nasa.gov/citations/19890000575
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