Optotune’s laser speckle reducers are nothing other than moving diffusers. But the way they are actuated is absolutely unique.
Laser speckle reduction
Reluctance force LSR
The basis of this approach is a single thin steel structure that is brought into resonance by pulsing an actuating coil with current, which generates a strong reluctance force. Thanks to a high q-factor large amplitudes in the range of 800um are achieved at low power consumption even for heavy glass diffusers. Optotune’s LSR-4C speckle reducer has an aperture of 18.5×18.5 mm and is especially suitable for applications where high laser powers and large beam diameters are used. The diffusor is mounted in a thin steel frame. As part of a larger metallic structure the frame is set into motion by the reluctance force, generated by the oscillating magnetic field of a driving coil. If required, the LSR-4C can combine two oscillating diffusors rotated by 90°, realizing optimized despeckling in both directions.
Compact design with integrated actuator
Works with different diffusor materials
Driving electronics integrated on flex-cable
Robust design for harsh environments
Long operational lifetime