we don't need to use the full resolution of our DMD (only about half of the vertical resolution is used), I was wondering if there are any ways to alter the effective FOV of the projector.
For example, if we are only using the center portion of the DMD, I would like to eliminate the top portion that is not being used. That way we wouldn't need to add a physical object to absorb the unwanted light. I've attached an illustration - Ideally the blue area would be masked off.
One potential solution I can think of is masking off parts of the DMD with an absorptive black material. Otherwise, we could also try to alter the optical design to change the aspect ratio, that would also preserve all the output as opposed to throwing out unusable light.
Do you have any other suggestions? or experience doing this?
