VSM
Groundbreaking contactless laser sensing technology
SMLD
self-mix-laser-diode
The first and only SMLD IC in the market. Simple optical design, low-cost, and small form-factor.
Tiny design- Superior Accuracy
Micron-scale motion and shape sensing.
Measuring velocity, distance and vibration
SMLD In brief
The laser diode contains a cavity, with a stable wavelength (𝜆). Light bounces between the two mirrors.
A small fraction of the light passes the front mirror toward the target.
When light hits the target, it reflects in all directions.
Small part of it reflects back into the laser.
The cavity is affected by the reflected light, thus causing a small change in wavelength (𝜆+∆), which results in a shift in power consumption (P).
