The OEM version of Optotune's laser speckle reducer comes with a minimal housing and is available with or without drive electronics.

The most important parameter is the choice of diffuser angles. Standard diffuser angles of 1°, 4.3°, 8.5° and 17° are available. The LSR consists of a dynamic diffuser and optionally a subsequent static diffuser. The latter is recommended when no homogenizing optics follow the LSR to increase the speckle reduction factor. Finding an appropriate system layout is key to effective and efficient speckle reduction. Our application note contains several suggestions, suitable for a variety of applications.

Optotune’s standard diffusers are made of a proprietary polymer, which offers a transmission range of 240 to 2500nm at a typical transmission of 93% and damage threshold of 300W/cm2. The diffuser itself is not coated, however VIS and NIR coated cover glasses are available as a standard. It is also possible to work with glass diffusers if they are similar in size and weight.

With an oscillation frequency of 180 Hz and an amplitude of about 400um, the 10mm aperture model is the preferred choice for applications with frame rates below 180Hz or for the human eye.

Design possibilites

Optotune has custom designed speckle reducers to suit diverse requirements. On the large side, diffusors of 50x20mm size have been actuated at >60Hz for head-up displays. On the small side, an LSR as tiny as 9x6x1mm has been prototyped for pico-projectors. 
Contact us to discuss options for your application.