Optotune's laser speckle reducers are nothing other than moving diffusers. But the way they are actuated is absolutely unique. Two innovative technologies are offered, each with its own advantages.

Electro-active polymer LSR

With its launch in 2011, Optotune is the first to commercialize electro-active polymers (EAPs) in the field of optics. The basis of this approach is a thin, elastic membrane that carries a lightweight diffuser in its center and four electrodes surrounding it. Actuated at a 90° phase shift, the electrodes induce a circular oscillation of the diffuser in x- and y-direction. The ultra-compact form factor, minimal weight and the absence of noise and vibrations make this technology particularly attractive for hand-held devices.

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.

• Compact
• Silent
• Low power
• Low vibration

Clear aperture

5 or 10mm

18.5x18.5mm

Diffuser

Optotune polymer

Glass or polycarbonate

Transmission

Oscillation type

2D (circular)

1D (linear)

Oscillation amplitude

300-400um

800um

Resonant frequency

300 or 180Hz

~120Hz (depends on diffuser weight)

Weight

3g

11g

Vibrations

None

Low (depends on mechanical mount)

Cover glasses

Required

None

5 VDC (EAP is pulsed with 300V)

5 VDC (coils are pulsed with current)

• Laser projection displays from cinema to pico        
• Head-up displays
• Beam homogenizer
• Metrology

• Microscopy
• Interferometry
• Lithography