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Old 06-22-2014, 06:24 AM #1
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Default Wierd polygonal Zerodur laser lens, what do you think its function was?

I have this weird polygonal lens which has a slight yellow tint to it, because of this I think it is likely made from Zerodur glass.

Can someone tell me what this kind of lens was probably made for? It's uber cool to me and I'm thinking of making a multidiode IR laser light out of it as it has a fairly close focal point. It's completely flat on the other side.

Please share your thoughts, thanks




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Old 06-22-2014, 06:28 AM #2
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Default Re: Please see this wierd polygonal Lens, what for?

Maybe it was a piece in a kaleidoscope? Or a part from a mechanical bug's eye? I would be interested in seeing what a beam looks like when put through that lens.
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Old 06-22-2014, 06:37 AM #3
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Default Re: Please see this wierd polygonal Lens, what for?

The seller told me it came from a large lot of laser lenses and other laser parts which were surplus from a government project.



I took a small low power red laser diode, removed its lens and used this one in its place. When holding it so close to the laser diode that only the center section has the light from the laser diode going through it, it will focus the light into a small spot but not quite as sharp as the original lens I removed from the small ponter. If I pull the lens away from the laser so the whole back end of it is radiated with unfocused laser light, then I have seven tiny little spots focused on the ceiling (my backdrop for it).

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Old 06-23-2014, 01:26 AM #4
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Thats really strange...closest thing i could find was this, from this page. Looks like maybe a combination of the last two? I dunno...really weird. I wonder what would happen if you shone 1 beam into each facet perpendicularly to the flat side of the lens, and vice versa (7 beams onto flat side).
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Old 06-23-2014, 03:48 AM #5
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Thanks, I have no clue what it's purpose was, but it appears to have been made for IR. Here's what a red laser looks like shining through the center section but out of focus. If I were to have seven lasers, each centered under each lens section, there would just be seven points of light, when in focus.

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Old 06-26-2014, 03:47 PM #6
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Not a clue. Not even an educated guess. But my uneducated guess is that it is for fiber injection. Or for beam shaping for some powerful optical tweezers. Or perhaps it was a laser technician's favorite paperweight.
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Old 06-27-2014, 02:01 AM #7
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Kinda looks like the lens on a PIR for an aircon.

Kinda like this:

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Old 06-27-2014, 03:04 AM #8
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

That's what I was thinking. It's probably a fly's eye type lens from some type of military grade motion
sensor.
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Old 06-27-2014, 04:07 AM #9
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

It seemed so exotic I bought it on ebay, but now I can't find a good use for it, but it will be a great paperweight Thank you for your thoughts.
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Old 06-27-2014, 03:28 PM #10
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Perhaps you could use it as a more compact version of your beacon/transmitter project, for to concentrate the beacon function without concentrating it too much.
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Old 06-27-2014, 03:36 PM #11
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Hummm...... I will ponder upon the possibilities
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Old 11-24-2014, 11:55 PM #12
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Think Again. Fill the whole optic with beams in your mind. It goes in the middle of the system of optics.
Not a one of you are close.

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Old 11-25-2014, 01:15 AM #13
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Default Re: Wierd polygonal Zerodur laser lens, what do you think its function was?

Easy for you since you already know what it
is
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