Laser speckle reducers (LSR) & beam homogenizers
Optotune's laser speckle reducers are nothing other than moving diffusers. But the way they are actuated is absolutely unique.
Applications:
Laser speckle reduction
Beam homogenization
Reluctance force LSR
Launched in 2016, the reluctance force LSR is particularly suitable for applications that require large format glass diffusers. 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.
Advantages:
Compact design with integrated actuator
Works with different diffusor materials
Driving electronics integrated on flex-cable
Robust design for harsh environments
Long operational lifetime
Reluctance force LSR
Large 2D LSR for automotive HUD
Optotune can customize LSRs based on its new voice-coil actuation platform that supports large clear apertures and large circular amplitudes in 2D. The devices can be driven with power-efficient PWM drivers. If needed, closed-loop control can be added. Such devices are suitable for de-speckling in head up displays (HUDs) when placed in the intermediate image plane. Please contact Optotune if you are interested to learn more about our development kit and a customization project.
| Specification | Reluctance force LSR |
|---|---|
| Clear aperture | 18.5x18.5mm | Diffuser | Glass or polycarbonate | Transmission | Up to 98% | Oscillation type | 1D (linear) | Oscillation amplitude | 800um | Resonant frequency | ~120Hz (depends on diffuser weight) | Weight | 11g | Vibrations | Low (depends on mechanical mount) | Cover glasses | None | Electronics | 5 VDC (coils are pulsed with current) | Operational lifetime | >40'000 hours |
