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Bridger Photonics - Model FMCW -Frequency-Modulated Continuous-Wave LiDAR
FMCW LiDAR uses the frequency (i.e. color) of the laser light to determine distance. This method enables the simultaneous measurement of distance and velocity, generating precise location data.
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- Transmit a continuous-wave laser to a portion of the object, where the laser’s frequency is intentionally changed in time.
- Measure the time it takes a certain laser frequency to travel to and return from that part of the object using interferometric techniques.
- Calculate the distance to that part of the object using the constant speed of light.
- Scan the laser beam over the object to determine the distance to all parts of the object and to create 3D imagery.
- Allows for better distance resolution than direct-detect LiDAR, enabling the measurement of fine surface structure.
- Insensitive to ambient light or other LiDARs.
- Velocity sensitivity, enabling the ability to directly measure an object’s speed.
- More complex than pulsed LiDAR.
- Can confuse distance with motion or surface roughness.