Old 07-15-2011, 09:50 PM #1
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Default Linear Defraction Grating

Hey, I was just wondering if I could learn a little more about these linear defraction gratings. I've seen them used on YouTube, and I wanted to get one to mess around with. The only place I can find them are places that sell them in bulk, so you have to pay around $50 for them. Can anyone explain how they work, and where to buy them individually or in small packages, instead of hundreds at a time?


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Old 07-15-2011, 09:53 PM #2
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Default Re: Linear Defraction Grating

These work - and are cheap:
Diffraction Grating Slide Linear 1000 l/mm Lamp / Laser | eBay
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Old 07-15-2011, 09:58 PM #3
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Default Re: Linear Defraction Grating

5+ Dollars for 1? The bulk sites sell them for $0.14 each?!? Thanks, I'll keep on looking just in case.

Anything on how they work?

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Old 07-15-2011, 10:00 PM #4
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Default Re: Linear Defraction Grating

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Originally Posted by Sajid View Post
5+ Dollars for 1? The bulk sites sell them for $0.14 each?!? Thanks, I'll keep on looking just in case.

Anything on how they work?
Key word there is bulk
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Old 07-15-2011, 10:01 PM #5
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Default Re: Linear Defraction Grating

Yes, but it makes you wonder how much these things cost to produce. If they sell them that cheap, they must be cheaper to produce, at least to some extent.
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Old 07-15-2011, 10:04 PM #6
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Default Re: Linear Defraction Grating

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Originally Posted by Sajid View Post
Yes, but it makes you wonder how much these things cost to produce. If they sell them that cheap, they must be cheaper to produce, at least to some extent.
They cost them near nothing, but the guy who gets 2.99 each, just buys a 50 pack at $0.14 a piece and can resell them for $3 knowing if you just want one, you have to use him
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Old 07-15-2011, 10:28 PM #7
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Default Re: Linear Defraction Grating

Pretty much anything you buy.. Even cars... will be cheaper in bulk. When you want small quantities.. Expect to pay more per item.. It's just the way things work.

Think of it like this. It takes roughly the same amount of time and work to package and ship 1 of them as it does 100.. Meaning with only 1, the full cost of that time is included in that single part, and with 100, it's spread out over 100.. Therefor the per part price of the 100 is considerably less than that of 1.

Any kind of retail place is going to be like that. Going to radio shack and buying 10 resistors will cost pretty much the same price as buying 1000 of them in bulk from some electronic parts distributor.. But it just depends on if you really /need/ 1000 of the same kind and value resistors or not.
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Old 07-15-2011, 10:56 PM #8
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Default Re: Linear Defraction Grating

i get mine from www.rainbowsymphony.com they have ones with resolution of 13,000 lines

i have it in 8"x6" sheet and i have slides.

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Old 07-16-2011, 02:54 AM #9
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Default Re: Linear Defraction Grating

Quote:
Originally Posted by Sajid View Post
5+ Dollars for 1? The bulk sites sell them for $0.14 each?!? Thanks, I'll keep on looking just in case.

Anything on how they work?
Yeah keep looking.... $5.00 instead of $50.00 just doesn't make
any sense...
Maybe you can find a free one in the garbage....

Jerry
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Old 07-16-2011, 03:01 AM #10
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Default Re: Linear Defraction Grating

Do you have a problem with me laserbee? Because if you do, I would appreciate you telling me instead of acting like a five year old. I already stated that I would forget about what ever it was that pissed you off the first time, but if you want to hold a grudge, your loss. I can't believe someone so high up on a forum rank has the ability to act this childish.


Anyway, thanks for the links and info everyone, you actually helped.
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Old 07-16-2011, 07:20 AM #11
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Default Re: Linear Defraction Grating

i got a bunch from chem class...
he has a large sheet for light demos and let me cut off a small corner around 2"x 2"
he even has those "diffraction glasses" (TOTALLY TRIPPY) and i took some of those too
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Old 07-16-2011, 03:22 PM #12
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Default Re: Linear Defraction Grating

Quote:
Originally Posted by Sajid View Post
Do you have a problem with me lasersbee? Because if you do, I would appreciate you telling me instead of acting like a five year old. I already stated that I would forget about what ever it was that pissed you off the first time, but if you want to hold a grudge, your loss. I can't believe someone so high up on a forum rank has the ability to act this childish.
Speaking of 5 year olds.................... I'll give you 10...

You complain about needing to spend $50.00 for a bulk purchase
to merely get one (1) Diffraction Grating....

Then a member shows you a place to get one (1) Diffraction grating
for $5.00... (at 1/10 the price) and you complain because YOU WANT
it for the bulk price of $0.14 ea....

Wake up and smell the coffee... maybe you don't know how it works
in real life.....
The more of something you buy.... The lower the price per item... but
you are required to buy a lot of items to get that cheap price for each
item....

YOU CAN NOT BUY ONLY ONE (1) GRATING AT THE CHEAP BULK
BUY PRICE WITHOUT BUYING THE REST OF THEM...

That is so easy to understand even a 10 year old could understand
that...
Even if you stamp your feet and hold your breathe until you turn
blue... and demand a Diffraction Grating for $0.14....

IT"S NOT GOING TO HAPPEN........

BTW....I thought you left the Forum on June 19.....
http://laserpointerforums.com/f37/ca...tml#post926033



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Old 07-17-2011, 04:47 AM #13
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Default Re: Linear Defraction Grating

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5+ Dollars for 1?
Um...if you're worried about spending $5 on a grating then you're in the wrong hobby. Seriously. This is NOT a cheap hobby, and never will be.
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Old 07-17-2011, 06:27 PM #14
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Smile Re: Linear Defraction Grating

Hey people, I found some high quality gratings Diffraction Gratings :: Dragon Lasers

they're more expensive, but they look about 50 times more durable and well built than the cardboard ones for 7 bucks.

I'm not shying away from spending five bucks, I just want to spend it on something that will last, and will work well throughout. The other ones were cardboard and plastic, looked almost disposable.

Thanks to everyone who gave a [civil] response.

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Old 07-17-2011, 07:15 PM #15
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Default Re: Linear Defraction Grating

Er. They're optics. How 'durable' do they need to be? The cardboard sleeves are just to give you a way of handling them without actually touching the diffraction material. If you think you can just throw these in a box with other junk and them not get ruined, then you'll likely find that's not the case regardless of how much you pay for them or where they come from.

And I don't particularly like ovaltine.
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