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Old 07-15-2010, 03:16 AM   #26
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Default Re: Laser "microscope"

Very cool-I've never tried eating M blue though lol, I suppose it's not poisonous?
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Old 07-15-2010, 03:20 AM   #27
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Default Re: Laser "microscope"

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Very cool-I've never tried eating M blue though lol, I suppose it's not poisonous?
Nope. It's safe.
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Old 07-15-2010, 03:31 AM   #28
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Default Re: Laser "microscope"

New thing to try...
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Old 07-15-2010, 03:50 AM   #29
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Default Re: Laser "microscope"

Here is the experiment done by Arbor Scientific. The narrator unfortunately misidentifies the wavelength of the laser; but the experiment works perfectly. The water acts as a small lens and assists in magnification. Bill

YouTube - Green Laser Microscope
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Old 07-15-2010, 04:12 AM   #30
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Default Re: Laser "microscope"

I'll try it that way next! However i must do it with a "dead" battery else my laser will incinerate the poor creatures.
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Old 07-15-2010, 04:14 AM   #31
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Default Re: Laser "microscope"

Try using a Wicked core or another 5mW 532. Bill
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Old 07-15-2010, 04:16 AM   #32
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Default Re: Laser "microscope"

My 5mw is on loan to a friend. Maybe i could use my Hene, but it would have to be in a dark room.
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Old 07-15-2010, 08:28 AM   #33
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Default Re: Laser "microscope"

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Here is the experiment done by Arbor Scientific. The narrator unfortunately misidentifies the wavelength of the laser; but the experiment works perfectly. The water acts as a small lens and assists in magnification. Bill

YouTube - Green Laser Microscope
Yeah, they're pretty close to the images I was seeing. And the same drop of water idea too.

Damn, now I want a laser with a frequency of 650nm. :P
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Old 07-15-2010, 01:35 PM   #34
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Default Re: Laser "microscope"

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Yeah, they're pretty close to the images I was seeing. And the same drop of water idea too.

Damn, now I want a laser with a frequency of 650nm. :P
You mean red? LASER DIODE MODULE, 650NM 4MW 3VDC | AllElectronics.com
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Old 07-15-2010, 02:02 PM   #35
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Default Re: Laser "microscope"

btw, frequency isn't a measurement of distance.

Try using hard-disk platters from a junked hard drive. Put your specimen on it, and focus laser to a point (assuming low power so you don't fry your sample).

I didn't see details as you did with your cell, but I did see quite a bit of magnification.
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Old 07-15-2010, 03:23 PM   #36
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Default Re: Laser "microscope"

Uranium: I doubt the image you obtained is of a cell. It looks like a common interference pattern caused by a small object or pit on slide. The cell's nucleus it too small. Once you get a near diffraction limited sized spot the energy density would be so high you'd cook the cell.

The Arbor Scientific video is the way to go. I'm going to try it this evening.
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Old 07-15-2010, 07:16 PM   #37
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Default Re: Laser "microscope"

Success!!

Here's a picture of the new projector:


The laser is attached to a tripod head using a rubber band (15-20mW 635 nm - you don't need or want a powerful laser for this). I adjusted the focus so most of the drop was hit by the laser stripe. I'm using an eyedropper. There's an alligator clip (with tape attached so the teeth of the gator clip don't damage the bulb of the dropper) used to squeeze out a drop of water. Cut out a hole in some cardboard to suspend the eyedropper.

Here are a couple videos. First video has some larger fleas. Second video has smaller spots which may or may not be bacteria sized critters. I don't think there's enough magnification.

I don't want to go swimming any more. There's a lot of stuff in the water!




Last edited by flogged; 06-26-2012 at 12:44 AM.
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Old 07-15-2010, 10:16 PM   #38
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Default Re: Laser "microscope"



renilla guassia pleuromamma luciferase bioluminescent coelenterazine
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Old 07-16-2010, 04:37 AM   #39
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Default Re: Laser "microscope"

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btw, frequency isn't a measurement of distance.
Of course I know that 650nm isn't a measurement of frequency. wow.

It was what the guy said in the video, hence the ":P" at the end of my post.
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Old 07-17-2010, 02:12 AM   #40
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Default Re: Laser "microscope"

Maybe with 1 watt of 445 there would be flaming water fleas followed by a melting eye dropper......
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Old 07-17-2010, 02:15 AM   #41
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Default Re: Laser "microscope"

This is truly one of the coolest things that you can show elementary school children with just 5mW of power. It's a great experiment with lots of "WOW" factor. Bill
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Old 07-17-2010, 04:13 AM   #42
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Default Re: Laser "microscope"

Double post? Lol.
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Old 07-17-2010, 07:21 AM   #43
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Default Re: Laser "microscope"

Alright, so after playing with the HeNe setup, I realized, I don't care if bacteria die! So I set up my highest power green. After turning it on and looking at the wall, I shat bricks. wow. 8 feet across of nothing but little bacteria, moving, fighting, feeding.

The setup,



The video
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Old 07-17-2010, 07:27 AM   #44
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Default Re: Laser "microscope"

HOLY SH*T! Was that a cat?








J/K that was f$cking awesome! I'm still watching this, it's SO crazy! I have to do this later!
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Old 07-17-2010, 07:32 AM   #45
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Default Re: Laser "microscope"

It was a cat. Little thing didn't know what to make it.
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Old 07-17-2010, 11:06 AM   #46
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Default Re: Laser "microscope"

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Originally Posted by Uranium View Post
Alright, so after playing with the HeNe setup, I realized, I don't care if bacteria die! So I set up my highest power green. After turning it on and looking at the wall, I shat bricks. wow. 8 feet across of nothing but little bacteria, moving, fighting, feeding.

The setup,



The video
YouTube - Missy Elliott - Pass That Dutch
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Old 07-17-2010, 04:45 PM   #47
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Default Re: Laser "microscope"

No need to quote that huge image, but okay.
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Old 07-19-2010, 06:34 AM   #48
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Default Re: Laser "microscope"

Uranium: How high was the laser power during that video?
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Old 07-19-2010, 05:41 PM   #49
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Default Re: Laser "microscope"

(...)

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Old 08-21-2010, 03:26 PM   #50
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Default Re: Laser "microscope"

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Uranium: How high was the laser power during that video?
250mW

Also,
Laser microscope projection - Hack a Day

Last edited by Uranium; 08-21-2010 at 06:01 PM.
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