Hi, I am using Discovery™ 4100 Starter Kit with 0.55'' XGA DMD. We are using our own optics and did a simple test to focus a fiber laser beam (visible spectrum) to the DMD with an angle of 24 degrees (roughly) with the normal of the mirror, what we got is a reflection in the center (white) together with many similar array images around the center image. And the surrounding array images are colorful rather than white. How can we obtain a clear reflection center only? Why there is so many arrays around it? Thanks.