Part Number:DLPLIGHTCRAFTER
Hi,
I am using the DLP LightCrafter Evaluation Module with the light engine removed. I am using a 405nm laser, which I know it technically not in the operating range of the DMD (420nm-700nm), but I've been careful not to send more light than what is advised in the DLP manual for wavelengths below 420nm.
I find that when I shine a clean, collimated beam on the DMD with all the pixels in the "1" state, the reflected beam expands in the horizontal axis (the axis in which the mirrors flip) such that after ~1m, the beam is roughly 10x larger in the horizontal axis than it is in the vertical axis. The also expands when reflected from pixels in the "0" state, or if I shine the beam at a different angle.
I thought that this behaviour could be explained if the mirrors were somehow bent, but if that were the case, I believe I should also see the same beam expansion when the mirrors are in the "flat" state (when the DMD is off), which I don't think I see.
Is that behaviour to be expected? What could possibly cause it, and how can I fix it?
Thank you,
Isabelle