microlenses

You can stack extension tubes to accomplish closer focusing distances. When you need to acquire a little closer to your subject, just screw a +1 diopter close-up lens on your standard camera lens. If that doesn’t allow you to get close enough, swap it for higher magnification, or combine the filters. But most lenses will…

can be achieved using on this method. However, this process requires expensive equipment and complicated procedures to produce the mask on the wafer. Besides, the control precision of the mask fabrication technology should be improved to meet certain requirements in the miniaturization of lenses. However, the optical system is hard to be miniaturized since it…