Recent content by Fioda

Thanks again! Here are the images of the airy discs. They are not so bad, are they? However, the trap is still not working properly, and when the beads are trapped (most of the time they go out of the trap but sometime they stay there), they are out of focus. Probably, I can overcome that...

Hi Andy, thanks for your answer. I did what you told me (using a viewer card). I finally could trap beads again BUT out of focus... besides, the laser does not look perfect (I attached a photo). How can I improve the focus of the laser? How can I get rid of residual aberrations?

Hi! I have the following problem: the optical tweezers attract beads but when the beads get to the trap, they are repelled. Furthermore, when once in a while a bead gets trapped, it goes out of focus. The tweezers are coupled to an inverted optical microscope. They are made with an IR laser...