skip to content


LDV Poster - FM

Interested in Laser Doppler Velocimetry (LDV) or Phase Doppler Particle Analysis (PDPA)? We can send you a free poster to display in your office or lab.

Request A Free LDV / PDPA Poster »

PowerSight Solid State Laser-based LDV System

Request A Quote Accessories Related Products Required Components

TSI's pre-configured one-component, two-component or three-component (1D, 2D or 3D) Laser Doppler Velocimetry (LDV) system, with the new PowerSight Solid State Laser, will get you up and running in a hurry. This new and improved setup features the PowerSight module, which includes the latest in solid state lasers, transmitting and receiving optics, and all control electronics for use as a standalone solution. 


Product Details

In fact, all three of TSI's LDV systems now combine state-of-the-art solid state laser technology and the patented and proven signal processing techniques, in order to provide reliable, accurate measurements for your research. Additionally, the new Microsoft® Windows® 7 64-bit based FlowSizer-64 software with the system allows you to easily navigate the software, in preparation for your demanding measurements. Results are made available instantly, allowing you to make adjustments if needed.

Request Free Full-Size LDV Poster

Features and Benefits

  • TSI's compact PowerSight module -- using the latest in solid state laser technology --  is configured for 1D, 2D and 3D arrangements to measure u, v and w components of the velocity in your flow field
  • Easy-to-use FlowSizer™ Data Acquisition and Analysis Software included- Microsoft® Windows® 7 64-bit compatible
  • Easy to upgrade from 1D to 2D and 3D configurations
  • High power lasers provide high SNR for high speed and complex flows
  • Coupled with the PowerSight module, fiber optic probes offer flexibility of the fiber optics arrangement, allowing measurements in underwater conditions, hostile environments and large wind tunnels
  • Beam expanders can be fitted onto the PowerSight module, providing long focal distance for flow measurements in large facilities
  • The PowerSight module is also configured for Phase Doppler measurement, providing simultaneous droplet size and velocity, like the PDPA system configuration 


  • Wind tunnels
  • Turbulence measurements
  • Water channels
  • Non-contact velocity measurements
  • Measurements in combustion, flames, rotating machinery
  • Field studies


    Resource Center

    • What is the difference between focal length and focal distance of a lense?
      Focal distance refers to the distance from the front of the lens to the beam crossing point (see figure).   To define the focal length, the lens is replaced by a line, AB. The positon of the vertical line is such that the two parallel beams are deflected, as shown in the figure, so that the two beams cross. The distance measured from this line AB to the focal point is referred to as the focal length of the lens. For the case of a thin lens (thickness of the lens/focal length is small), the value of focal length and focal distance are almost the same. For the case of a thick lens, the location of the line AB will be noticeably different from the front of the lens. Hence, the focal length and focal distance will differ.
    • What is the relationship between the velocity component measured and the frequency (Doppler) of the signal?
      The component of velocity that lies in the plane of the beams and normal to the bisector of the two laser beams of a dual-beam system is measured by an LDV system. From the following figure, the component of velocity measured is uy. If 2kappa is the angle between the two beams, the fringe spacing, df for the dual beam LDV system is:df = lambda / (2 sin kappa)where lambda is the wavelength of light.If fD is the Doppler frequency of the signal generated by the passage of a particle with velocity u (see figure) through the measuring volume:fD = uy / df Hence, the frequency of the Doppler signal is proportional to velocity.

    Required Components

    If you are seeing this, then the pnlEUCookieScripts is working