Title: NIST Develops Calibration Apparatus for Laser Doppler Vibrometers
Summary:
The National Institute of Standards and Technology (NIST) has developed a new calibration apparatus specifically designed for calibrating laser Doppler vibrometers. This apparatus includes a frequency shifter stage that receives primary laser light from the vibrometer, produces frequency-shifted light, and communicates it to a reflector. The frequency-shifted light is then reflected back to the frequency shifter stage, which produces secondary light and sends it back to the vibrometer. This process allows the vibrometer to generate a synthetic velocity shift based on the secondary light, enabling accurate calibration of the device.
The development of this calibration apparatus is significant for several reasons. First, it provides a standardized method for calibrating laser Doppler vibrometers, which are used in various applications such as non-destructive testing, structural health monitoring, and vibration analysis. Second, the apparatus ensures that the vibrometers produce accurate and reliable measurements, which is crucial for maintaining the integrity of the data obtained from these devices. Finally, the development of this calibration apparatus demonstrates NIST’s commitment to advancing the field of vibration measurement and ensuring the accuracy of these important tools.
Source: https://www.nist.gov/patents/calibration-apparatus-and-calibrating-laser-doppler-vibrometer-0
Keywords: frequency, light, velocity, shifted, laser, doppler, vibrometer
