Idea was sparked from this topic: https://photonlexicon.com/forums/sho...e-have-spekcle
There appear to be some affordable speckle reducers here: https://www.optotune.com/products/la...eckle-reducers
There is one "but" here, the price of the despeckler depends on its aperture, so the smaller the laser beam the smaller the despeckler can be.
The DMD chip I have is 11mm in one axis, sadly a bit more than the stock aperture they have. So the typical setup as in laser scanner projectors of combining R, G, B lasers with dichros won't do because the beams will be collimated before reaching the despeckler and slightly larger for it. Two lenses could be used before and after tghe despeckler to make the beam small to fit the despeckler aperture then back to the size needed, however this won't work with two element lenses as only one wavelength will be properly collimated. To work with 3 colors the number of lenses will take up space and be costy. Any workaround ideas to this?