Laser Doppler imaging - Wikipedia
Laser Doppler imaging (LDI) is an imaging method that uses a laser beam to image live tissue. When the laser light reaches the tissue, the moving blood cells generate Doppler components in the reflected ( backscattered ) light.
Laser Doppler velocimetry - Wikipedia
Laser Doppler velocimetry, also known as laser Doppler anemometry, is the technique of using the Doppler shift in a laser beam to measure the velocity in transparent or semi-transparent fluid flows or the linear or vibratory motion of opaque, reflecting surfaces.
Laser Doppler Flowmetry - an overview | ScienceDirect Topics
Laser Doppler flowmetry is a blood flow measurement method based on the Doppler shift of NIR light scattered by moving red blood cells. It is similar to Doppler ultrasound, which uses the Doppler frequency shift between the sent and detected wavelengths to quantify blood flow speed.
Laser Doppler Velocimetry: Applications & Principles
Laser Doppler Velocimetry (LDV) is a non-intrusive technique used in fluid dynamics research to measure the instantaneous velocity of a flow field. The principle behind LDV is based on the Doppler effect, where the change in wavelength of reflected laser light is proportional to the relative velocity of the target object.
Laser Doppler Anemometry [LDA] The concept of a Doppler shift is familiar to us from the downshift in pitch that we hear as a siren moves towards and then away from us. The faster the moving source of sound, the greater the shift in frequency. This effect is also observed with light.
How an LDV/LDA works - Measurement Science Enterprise, Inc.
A Laser Doppler Velocimeter (LDV), also known as a Laser Doppler Anemometer (LDA), is a type of interferometer that measures the velocity of objects using laser light. The objects can be microscopic particles in a fluid or solid surfaces—the concept is even used in …
Introduction to Laser-Doppler Vibrometry | SpringerLink
Jun 10, 2020 · Laser-Doppler vibrometers with the eye-safe laser wavelength at 1550 nm are well suited to measure vibrations on the human skin. The high dynamic range of laser-Doppler vibrometers enables robust measurements of the skin vibration.
Laser doppler velocimetry (LDV) is a technique in which the velocity of a fluid is calculated from the measured doppler frequency shift of a laser beam scattering from tracer particles in the fluid. The relativistic doppler shift is given, for particles traveling much less than the speed of light, by
Laser Doppler Velocimetry (LDV) - digitalimagecorrelation.com
Laser Doppler Velocimetry (LDV) is a technique which allows the measurement of velocity at a point in a flow field with a high temporal resolution.
Laser Doppler and Phase Doppler Measurement Techniques
Providing the first comprehensive treatment, this book covers all aspects of the laser Doppler and phase Doppler measurement techniques, including light scattering from small particles, fundamental optics, system design, signal and data processing, tracer particle generation, and applications in single and two-phase flows.