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pashok
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Join Date: May 2010
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Fresnel Lense

05/29/2010 11:18 PM

Would like to have information on how to produce fresnel lense and the machines which are used to produce fresnel lenses.
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lyn
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#1

Re: fresnel lense

05/29/2010 11:39 PM

These are normally produced by injection molding.

Unless they are glass, of course.

Have you done any research, other than coming here?

Like maybe Googling fresnel lense?

Fresnel lens - Wikipedia, the free encyclopedia

My God! Are you all totally helpless??????????????????
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pashok
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#2
In reply to #1

Re: fresnel lense

05/30/2010 12:04 AM

Thanks for your reply.Can the die cavity of mold fill with hot runner system giving all the details?The material used is PMMA.I read that compression molding can also be used for this.Also tooling is very critical.

regards

ashok
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lyn
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#3
In reply to #2

Re: fresnel lense

05/30/2010 9:29 AM

"Can the die cavity of mold fill with hot runner system giving all the details?" Yes, if the proper grade of acrylic is used. "I read that compression molding can also be used for this." It can be. Cycle times will be much longer.

You could also mix your own liquid PMMA and pour it into an open top mold and cure it. This would be the slowest process.
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DVader1000
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#4
In reply to #3

Re: fresnel lense

05/30/2010 10:03 AM

Scary thought. It sounds like he wants to set up a plant to produce Fresnel lenses without knowing how it's actually done.

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lyn
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#5
In reply to #4

Re: fresnel lense

05/30/2010 10:08 AM

For people such as this, ignorance of the facts is rarely a deterrent.

At least he hasn't asked how to hook up the 440V service, yet.
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DVader1000
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#6
In reply to #5

Re: fresnel lense

05/30/2010 8:15 PM

Now that would be really bad.

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bioramani
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#7
In reply to #6

Re: fresnel lense

05/31/2010 12:47 AM

That reminds of the story about an electrical maintenance chap called in to set right a HT line blown down in high wind. He asks his helper to move aside one of the bare cables lying on the ground. The helper pushes it aside and asks what next. The electrician says,' Then the other one must be the HT cable'. Bioramani

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DVader1000
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#11
In reply to #7

Re: fresnel lense

05/31/2010 8:45 AM

Good one.

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gsuhas
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#9
In reply to #5

Re: fresnel lense

05/31/2010 1:33 AM

Mark Twain has said "To be successful, you should be ignorant and confident". OP has bot these, he will be successful.
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wangito
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#12
In reply to #1

Re: fresnel lense

05/31/2010 6:54 PM

you wrote...

My God! Are you all totally helpless??????????????????

No, just lazy. Will not even go to the spell checker.

Wangito.

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bioramani
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#8

Re: Fresnel Lense

05/31/2010 1:00 AM

http://www.fresneltech.com/pdf/FresnelLenses.pdf http://www.fresneltech.com/tooling.html bioramani

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Tornado
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#10

Re: Fresnel Lense

05/31/2010 3:07 AM

For that matter, the spelling "lense" was a likely tipoff of naiveté.

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Anonymous Poster
#13
In reply to #10

Re: Fresnel Lense

06/14/2010 9:23 AM

En Espanol:

Spoken: Lense

Written: Len se

Translation: Len itself

Len: Applied to soft, untwisted silk.

Translation: Applied to soft, untwisted silk itself.

Comprende?
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Tornado
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#14
In reply to #13

Re: Fresnel Lense

06/14/2010 10:39 AM

¡Muchas gracias!

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Users who posted comments:

Anonymous Poster (1); bioramani (2); DVader1000 (3); gsuhas (1); lyn (3); pashok (1); Tornado (2); wangito (1)

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