Investigation of evaluation method for laser Doppler vibrometer in ultra-high frequency region

Towards expansion of high-frequency vibration acceleration standard using laser Doppler vibrometers

Abstract

As an international calibration standard (ISO 16063-41) traceable to the national standard for laser Doppler vibrometers, secondary calibration method using a reference accelerometer is specified up to 20 kHz, while calibration method up to the MHz order is demanded. This time, we have evaluated the frequency response of the laser Doppler vibrometer in the ultra-high frequency region by inputting the beams of a reference laser interferometer and a laser Doppler vibrometer into the same electro-optic modulator, and will report on the results.