A different take on a laser projection microscope

[Dusjagr] has another take on building a laser projection microscope. Last year we saw a laser-based microscope that shined the beam of light through a water droplet which contained the subject to be magnified. The droplet bent the focused beam of light and projected the magnified contents onto a screen. Now that’s pretty neat and [Dusjagr] has used that method himself. But most traditional microscopes use glass slides to contain the subject and this new version now makes that possible.

A bit of experimentation led [Dusjagr] to the discovery that a lens re-purposed from a webcam can achieve similar focus results as a water droplet. The video after the break shows the apparatus seen above in action. The laser shines through the lens, then through a slide that contains a water sample from a nearby pond. The image is clear, albeit completely bathed in green.

For us the most interesting part of [Dusjagr's] writeup is his discussion of the limits of laser amplification based on the wavelength of light the diode puts out.


  1. xeracy says:

    well you wont catch me drinking pond water again…

  2. therian says:

    @xeracy leave open bottle water for a day and you find same stuff, eggs fly in air everywhere

  3. thelackey3326 says:

    You can’t fool me! I know a lightsaber when I see one!

  4. Jim Lund says:

    Bacteria and other um sized objects can be seen in a visible light microscope. After all, that’s what the common microscope is used for. Optics quality is usually the limiting factor.

  5. rasz says:

    so what happens when one leans over the microscope and shines laZ0r right into ones eye?

  6. r_d says:

    @Jim Lund:
    Technically, this is also a visible light microscope. I suppose you meant _conventional_ visible light microscope.

  7. Ryan says:

    Holy shit that is scary

  8. cogworkz says:

    I still think someone needs to try this with a UV laser projected onto a glow in the dark surface.

    Since the UV laser will charge the phosphors it will act like a photographic plate. Long exposure laser microscopy. :)

    If someone tries this, be sure to kill the lights after a short exposure so you can see/photograph the image.

  9. zool says:

    crazy nematodes

  10. 0.zer0 says:

    I’m guessing that that laser has a low output. Otherwise, wouldn’t it be cooking the sample?

  11. Kris Lee says:

    Is the laser nessesary or you could use some conventional strong light source?

  12. supershwa says:

    If the laser can damage your eye…would it not cause harm to any of the lifeforms in the water sample?

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


Get every new post delivered to your Inbox.

Join 97,511 other followers