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

Mirror

Mirror

𝜆

Target

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.

Mirror

Mirror

𝜆

Target

When light hits the target, it reflects in all directions.

Small part of it reflects back into the laser.

Mirror

Mirror

𝜆+∆

Target

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).

Mirror

Mirror

𝜆+∆

Target

The VZ innovative SMLD IC tracks the power changes and deduces velocity and distance to the target. 

 

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