reflection mirror from a old Hardrive disc

Discussions on optics for laser cutter/engravers

Re: reflection mirror from a old Hardrive disc

Postby Robert Williams » Sun Jan 29, 2012 10:40 pm

What material should used to protect/store these mirrors?
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Re: reflection mirror from a old Hardrive disc

Postby a542002 » Sun Jan 29, 2012 10:44 pm

the best is lens cleaning wipes and a zipper bag
greetings
walt


Robert Williams wrote:What material should used to protect/store these mirrors?
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Re: reflection mirror from a old Hardrive disc

Postby Greolt » Mon Jan 30, 2012 12:59 am

Can someone clarify for me,

On reading this thread, I have the impression that some hard drives have a suitable platter material and most don't.

Would this be correct? If so, is there any indication of which drives to look for.

Thanks,

Greolt
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Re: reflection mirror from a old Hardrive disc

Postby Robert Williams » Mon Jan 30, 2012 1:45 am

GREOLT

Samsung SP 1604N... one aluminum platter.
Hatachi deskstar... two aluminum platters.

Robert
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Re: reflection mirror from a old Hardrive disc

Postby twehr » Mon Jan 30, 2012 3:08 am

Mine was a stock drive from a DELL.

I believe you may actually may fond that most are OK. Since most dead drives are essentially free, just rip one open and see what you have.
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Re: reflection mirror from a old Hardrive disc

Postby a542002 » Mon Jan 30, 2012 10:44 am

ok guys
all hardrive discs are usable the most discs have the base from a aluminium alloy and the mirroring coat is a special alloy what has cobalt in it.
only some high expensive ones ar made from silicon base.
it does not matter which one
the mirrors what comes out of any of them are superior especially when it comes to dust collection they are collecting far less dust but cleaning is much easier because the mirror coat is so hard i have try a comparison the gold coated mirror s can not be cleaned with a regular lens cleaning wipes because they are very sensitive against scratches they have to be cleaned with alcohol or aceton never dry, the disc mirror can be cleaned off with a dry soft cloth and no scratches.
some harddrives have two or more disc in it depending on the memory size with them there are even more mirrors comming out.
ok sofar
greetings
walt
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Re: reflection mirror from a old Hardrive disc

Postby Greolt » Mon Jan 30, 2012 1:28 pm

Thanks for that info.

Tomorrow I will bust open a couple of drives and have a look.

Greolt
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Re: reflection mirror from a old Hardrive disc

Postby a542002 » Mon Jan 30, 2012 1:49 pm

look for the HD which have thick disc ( about 1/16) this ar the best in regards to the mirrors because it does not need then any piece for distance
greetings
walt


Greolt wrote:Thanks for that info.

Tomorrow I will bust open a couple of drives and have a look.

Greolt
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Joined: Wed Oct 19, 2011 9:37 am

Re: reflection mirror from a old Hardrive disc

Postby artwood_decor » Wed Feb 15, 2012 2:32 pm

Those of you using the new mirrors made of hard drive platter, can you please keep us informed how they taking the "new job".
Any issues?
Do they get burns?
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Re: reflection mirror from a old Hardrive disc

Postby twehr » Wed Feb 15, 2012 6:28 pm

artwood_decor wrote:Those of you using the new mirrors made of hard drive platter, can you please keep us informed how they taking the "new job".
Any issues?
Do they get burns?


I am currently using these for 2 of my 3 mirrors (simply haven't taken time to replace the final mirror yet). I continue to get top performance out of mine. I think they are LESS prone to dirt, smudges, smoke, etc. They are also MUCH easier to clean and less apt to be scratched in the process.
tim
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