Part Number: DLPLIGHTCRAFTER
Hi everyone,
We are facing a problem, when using Lightcrafter EVM in the “Stored Pattern Sequence” mode, where we use a set of binary random masks. The DMD device for some reason displays a set of dark stripes.
To explain closely - we use binary random masks (containing pixels of 0 or 255 intensity) with a given resolution (for example 80x80). The masks are resized for the Lightcrafter native resolution (608 x 684 pixel) and sent to Lightcratfer to be displayed (single image time of about 0.1 s).
We have checked that the resized arrays (608x684 pix.) look as expected. When we send such images to Lightcrafter to be displayed in the sequence mode, we observe a strange fence-like pattern to occur between the mask pixels. Interestingly, such pattern becomes clearly visible only when we average several patterns.
For a comparison, I attach:
(i) a numerical average of 10 random masks sent from Matlab in a Stored Pattern Sequence mode to the DMD (no stripes present)
(ii) an image of the DMD captured with a camera with sufficient exposition assuring the masks averaging (visible stripes in the zoomed image).
Do you have any explanation for this? Would it be possible to get rid of it?
Thanks,
Karel