2000 to 2010

A number of industries were making measurements for products in the areas of production and quality long before the year 2000. However, it was during this decade that measurements using laser Doppler vibrometry became much more widespread, especially in the area of household appliance products (toothbrushes, atomizers, washing machines, dryers, air conditioning compressors, etc.), transportation (gearboxes and differentials, compressors, ventilation systems, brake systems[8]​), micromirrors, valves. for microfluidics, length and velocity measurements in the steel and metals industry and many more.

This decade also provided the refinement of vibrometers for out-of-plane, in-plane dynamic scanning microstructure (MEMS) measurements, and measurements for surface metrology.

Scanning Vibrometry continued to mature given the needs of engineers in research and development in the areas of dynamics. The main problem was to accelerate the mechanical and dynamic tests in order to provide the information to the researchers in charge of modeling (FEA). This need is very evident in the aerospace[8]​ and automotive industries. For this purpose, techniques for surface measurements and static topography in three dimensions (3D) without contact were applied and were coupled and added to 3D vibration measurements. The result was the introduction to the market of vibrometers to measure in three dimensions 3D both in topography and dynamics in the middle of the decade in Germany. At the end of the decade, robotic systems were added to accelerate the process of measurement and correlation to FEA models,[9]​ since to carry out this correlation there must be a sufficiently large number of nodes to satisfy the needs of experimental modal analysis") and that in turn satisfy the finite element model (FEM). This technology, 3D robotic vibrometry, is being widely used in advanced countries to accelerate the engineering and product development process and to solve problems related to quality control in a short time. One of "such examples is the use of 3D vibrometry to detect fatigue grooves in metal structures using Lamb waves").

2010 to Present

In recent years, advances in technology require more precise and demanding mechanical measurements, among them are: RF MEMS), civil structures at long distances, stress measurements.

RF MEMS are widely used in telecommunications and other applications, they require and demand mechanical measurements that previously seemed practically impossible in the GHz range. For this purpose, the Ultra High Frequency Vibrometer (UHF) was developed[10]​[11]​.

Other needs at the other end of the structure scale require dynamic measurements on very large structures such as windmills for electricity generation, tall towers, bridges and other civil structures.[12]​ The recently designed RSV (Remote Sensing Vibrometer) is a long-distance vibrometer and allows identification of defection forms at very low frequencies.[13]​

On the other hand, advances in robotic stations are making it possible to measure stresses[14]​ on surfaces using 3D scanning vibrometers with more precision and accuracy than before.

1990 to 2000

After 1990, more sophisticated arrangements began to penetrate the world market. Heterodyne designs using more complex interferometers such as the Mach-Zender shown in figure 2. Safer lasers such as HeNe 632nm visible with power of less than 1mW (class 2) were also used.

The advantages of this new technology allowed measurements to be made in a greater number of applications such as data storage (hard drives), automotive, aerospace, biomedical, defense, etc. At the beginning of this decade, the first Scanning Vibrometer was introduced, which uses mirrors in two angular axes to direct the laser beam in XY axes to make dynamic tracking measurements on surfaces.

The first versions of this system made measurements only in sinusoidal mode. In the mid-90s, the first scanning vibrometer with full spectral measurements up to 200KHz was introduced to the market. This version could provide frequency responses"), transfer functions"), dynamic coherence and other functions.

This decade provided a proliferation of non-contact measurements in a wide variety of applications in the following areas: automotive (brake systems, chassis, suspensions, bodies, tires, exhaust systems, valves and motors, bearings, etc.) in microelectronics (heads in suspensions on hard disks, topographic measurements on disks) in the fields of MEMS (Micro-Electromechanical Structures). The discipline of non-destructive testing and evaluation (NDE and NDT) received a great boost during this period. Vibrometry allowed observation and aided understanding of how certain types of waves propagate and how they are related to the formation and propagation of grooves and defects in different types of materials[3].

In biology and medicine, particularly important discoveries were made in the areas of hearing in reptiles and batrachians[4]​ and later in humans with measurements in the middle ear[5][6]​ and internal ear first in temporal bones and later with live measurements in the tympanic membrane and then during surgical procedures to corroborate middle ear implants.[7]​.

2000 to 2010

A number of industries were making measurements for products in the areas of production and quality long before the year 2000. However, it was during this decade that measurements using laser Doppler vibrometry became much more widespread, especially in the area of household appliance products (toothbrushes, atomizers, washing machines, dryers, air conditioning compressors, etc.), transportation (gearboxes and differentials, compressors, ventilation systems, brake systems[8]​), micromirrors, valves. for microfluidics, length and velocity measurements in the steel and metals industry and many more.

This decade also provided the refinement of vibrometers for out-of-plane, in-plane dynamic scanning microstructure (MEMS) measurements, and measurements for surface metrology.

Scanning Vibrometry continued to mature given the needs of engineers in research and development in the areas of dynamics. The main problem was to accelerate the mechanical and dynamic tests in order to provide the information to the researchers in charge of modeling (FEA). This need is very evident in the aerospace[8]​ and automotive industries. For this purpose, techniques for surface measurements and static topography in three dimensions (3D) without contact were applied and were coupled and added to 3D vibration measurements. The result was the introduction to the market of vibrometers to measure in three dimensions 3D both in topography and dynamics in the middle of the decade in Germany. At the end of the decade, robotic systems were added to accelerate the process of measurement and correlation to FEA models,[9]​ since to carry out this correlation there must be a sufficiently large number of nodes to satisfy the needs of experimental modal analysis") and that in turn satisfy the finite element model (FEM). This technology, 3D robotic vibrometry, is being widely used in advanced countries to accelerate the engineering and product development process and to solve problems related to quality control in a short time. One of "such examples is the use of 3D vibrometry to detect fatigue grooves in metal structures using Lamb waves").

2010 to Present

In recent years, advances in technology require more precise and demanding mechanical measurements, among them are: RF MEMS), civil structures at long distances, stress measurements.

RF MEMS are widely used in telecommunications and other applications, they require and demand mechanical measurements that previously seemed practically impossible in the GHz range. For this purpose, the Ultra High Frequency Vibrometer (UHF) was developed[10]​[11]​.

Other needs at the other end of the structure scale require dynamic measurements on very large structures such as windmills for electricity generation, tall towers, bridges and other civil structures.[12]​ The recently designed RSV (Remote Sensing Vibrometer) is a long-distance vibrometer and allows identification of defection forms at very low frequencies.[13]​

On the other hand, advances in robotic stations are making it possible to measure stresses[14]​ on surfaces using 3D scanning vibrometers with more precision and accuracy than before.