Optical　coherence　vibrometer　(OCV)　is　an　optical　vibration　measurement　technology　which　presents　the　advantages　of　noncontact,　high　precision,　and　large　dynamic　measurement　range.　The　OCV　equipment　and　the　related　theories　are　proposed　to　avoid　excessive　demands　in　monochromaticity　and　stability　of　the　laser　source.　The　performance　of　laser　Doppler　vibrometer　(LDV)　is　complemented　by　OCV　with　low　cost.　In　order　to　obtain　large　dynamic　measurement　range　(i.e.,　from　nanometer　scale　to　centimeter　scale),　the　differential　effect　from　multiwavelength　components　is　used　to　break　the　phase　limit　of　laser　interference.　However,　due　to　the　interference　blurry　effect,　its　high-velocity　measurement　performance　is　limited.　To　solve　this　problem,　a　novel　optical　vibrometer　with　a　high-speed　measuring　capability　called　swept-source　OCV　(SSOCV)　was　proposed.　In　SSOCV,　both　a　swept-laser　source　and　single-point　photodetector　were　employed　to　replace　the　conventional　superluminescent　diode　and　spectrometer.　These　two　units　help　the　SSOCV　to　divide　the　full　bandwidth　interference　signal　into　single-wavelength　signals,　which　are　subsequently　collected　by　the　photodetector.　Therefore,　the　exposure　time　of　interferometric　signal　was　reduced　and　the　measuring　speed　was　highly　improved.　Taking　advantage　of　these　features,　our　SSOCV　can　be　applied　in　many　different　fields　particularly　in　highly　accurate　measurements　applications　such　as　the　displacement,　mechanical　vibration,　as　well　as　acoustic　and　ultrasonic　vibration　among　others.　©　1963-2012　IEEE.