Focus-locking Foldscopes (in the works!)

Have any of you had this difficulty with the Foldscope? After scanning your sample for a few minutes, you find an awesome micro-structure you’ve never seen before. Excitedly, you hand your Foldscope to a friend so they can see it too, and they see… nothing. Not only has the sample gone out of focus, but the lens has moved quite a bit from the location you were just looking at. The Foldscope team has been very much aware of this hurdle, and we have been thinking of innumerable ways to tackle this issue.

I am happy to report that the development of a  focus-locking model of Foldscope is well on its way. Meaning, once you find a cool microstructure and get it into focus, it’s set. You can hand the Foldscope to a friend and they will see the exact same thing you just saw (unless you have a living sample moving about, see the copepod below!).

Here’s an image of the latest prototype at work, and a process I like to refer to as laptop microscopy:

focus lock

I can’t reveal too much right now, as the design is subject to change, but I would like to leave some sample footage of focus locking in action.




8 Comments Add yours

  1. Saad bhamla says:

    I really like the term – laptop microscopy : )

  2. laksiyer says:

    Cant wait to hear more

  3. Manu Prakash says:

    @laks: focus locking – coming soon. The beauty is that it uses the exact same raw material – just paper. We are getting t ready for next round of production; and will also post modifications to current foldscopes to include this feature as well 🙂


  4. Sumitra Tatapudy says:

    This is just what I needed! Thanks for sharing!!

  5. LOUKIA says:

    Can’t wait to get a couple of these, very useful!

  6. Kate Honan says:

    VERY cool! Can’t wait!

  7. bfrieds says:

    @Manu Can’t wait! This will really help with the problems we were having with the Raspberry Pi Foldscope setup!


  8. Matt.Rossi says:

    Very interesting…I find myself twiddling my thumbs in anticipation.

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