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A laser light-powered accelerometer — a sensor that detects sudden changes in velocity — operates over a greater range of frequencies than comparable, nonoptical instruments, and at a higher rate of accuracy. Researchers from NIST developed the optomechanical accelerometer device, which is 1 mm thick and bypasses reliance on mechanical strain by using light as its activator. The device, the researchers said, also does not require periodic calibrations.
Though other light-powered accelerometers exist, the NIST-design delivers higher accuracy than similar and comparable instruments.
All accelerometers record changes in velocity by tracking proof mass, or the position of a freely moving mass, relative to an unmoving…READ MORE