Hey, guys! Today we are making diy face masks. One option uses cotton pillowcase fabric as well as coffee filters. These are not a substitute for N-95 facemask, they only offer some protection. But ...

DIY photolithography using a direct write laser machine. This is a maskless technique (similar to projection lithography) to ...

Abstract: We demonstrate a versatile thin lensless camera with a designed phase-mask placed at sub-2 mm from an imaging CMOS sensor. Using wave optics and phase retrieval methods, we present a general ...