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Part Number: DLP650LNIR
I'm using a collimated NIR laser with a DMD chip and I want to eliminate the diffraction effects from my projected image. My setup is a common projection system where I'm imaging the surface of the DMD chip.
Is there a common way to reduce the coherency of the laser? Would dithering work?
Thanks for your help!
Welcome to the DLP section of the TI-E2E forums.
So as I understand your setup, you are using a collimated NIR laser to illuminate a DMD and then a lens after the DMD to re-image the surface of the DMD on a screen or production surface of some kind.
A lens should re-converge the diffraction patterns back to a coherent image at the focus of the lens.
Is your lens coated for NIR? If not this could introduce unwanted reflections at the lens.
What diffraction effects are you experiencing? A picture would be very helpful, but I know that could be a little challenging in the IR.
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