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Author Topic: Laser Diode Lens Test  (Read 5271 times)

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Laser Diode Lens Test
« on: May 11, 2013, 06:29:11 AM »
While fine tuning the focus of a new lens for my laser diode the other day, I decided to test how fine a spot the lens was focusing too.  This is a dried pinto bean with the maximum height of the letters at .025 inches / .635 mm high.  I think I could have done even smaller engraving if I had reduced the laser power more, but I ran out of play time.  :D

John



Offline Chaoticone

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Re: Laser Diode Lens Test
« Reply #1 on: May 11, 2013, 11:15:42 AM »
Unreal!  :o  That's just tiny!  Take a picture of a set of calipers set to .025 for a visual.............. that picture is great but doesn't do it justice.  Maybe stretch a hair across the writing long ways?

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

My guard dog is not what you need to worry about!
Re: Laser Diode Lens Test
« Reply #2 on: May 11, 2013, 03:35:43 PM »
Thank Brett,
Good advice.  Here's a couple more pics - best I can do with a makeshift closeup lens.

John
Re: Laser Diode Lens Test
« Reply #3 on: May 11, 2013, 03:39:07 PM »
Hey Jeff,
Post your rice grain pic.

John

Offline RICH

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Re: Laser Diode Lens Test
« Reply #4 on: May 17, 2013, 07:15:19 AM »
Like those small pic's.
BTW, smallest letters you can achieve will be based on the thickness of the lines making up the letter or number.
RICH
Re: Laser Diode Lens Test
« Reply #5 on: May 19, 2013, 08:45:05 AM »
Hey Jeff,
Post your rice grain pic.

John

Darn, I don't know how I missed this thread and your request John.  :-[

Here it is. I used an old version of Bobcadcam to generate the code and hot melted the grain of rice to a piece of anodized aluminum. Good thing my name is not to long.  ;D

Jeff

Extensivly Re-worked/Re-designed/Modified Servo K2CNC KG-3925 and the Mini Laser Engraver