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FrozenGate by Avery

Inexpensive, decent correction for 300mW Mitsubishi 635nm laser @ 94% transmission

Cyparagon said:
I got a set a few years back. I'll go try it out.

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Replicated :beer:

I got about 4% loss. Magnification is around 3x. I tested divergence at 7 meters, but evidently 7 meters isn't long enough to test divergence. You end up focusing to that point instead of infinity. I was able to get it down to 0.14mRad which isn't possible :o I don't think 33ft will be much better. In theory it should be around 1-1.2. Advantages over Dr. Lava lenses: slightly cheaper, fits larger beam, already mounted, will potentially ship faster.
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I believe most diode lasers have short Rayleigh Lengths < 33ft. Therefore you should be good to go when you measure beam size a 33ft.
 





qumefox said:
I honestly wouldn't dally long.. however, the only real use for these would be people building projectors... Of which there aren't many of here. So I doubt they'll vanish 'over night' unless someone posts it over at PL too. heh.
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And who would do such a thing.:scared:
 
Just a little heads up; I have found these exact sets for sale at a cheaper price. :)

On the Meredith website, the sets are $39 plus ~ $16 shipping via UPS ground.
For 2 sets, shipping is ~ $18.

On Meredith's Ebay store, the same sets are $34.95 per set.
Shipping is $5 for the first set (USPS Priority Mail); free shipping each additional. :D

Here's the link to the ebay sale page for these optics sets:
LASER OPTICS LOT MIRRORS LENSES mounts optic dpss hene diode light show | eBay

I just bought 2 and there are 9 sets available as of this posting!! :eek:
Jump on 'em quick,guys! :wave:
 
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rocket689 said:
Just a little heads up; I have found these exact sets for sale at a cheaper price. :)

On the Meredith website, the sets are $39 plus ~ $16 shipping via UPS ground.
For 2 sets, shipping is ~ $18.

On Meredith's Ebay store, the same sets are $34.95 per set.
Shipping is $5 for the first set; free shipping each additional. :D

Here's the link to the ebay sale page for these optics sets:
LASER OPTICS LOT MIRRORS LENSES mounts optic dpss hene diode light show | eBay

I just bought 2 and there are 9 sets available as of this posting!! :eek:
Jump on 'em quick,guys! :wave:
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Thats Meredith instruments on ebay. I wonder way they have it like that.

I always Wondered if that was them.
 
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Well, the website and the ebay page have the same pictures and the same descriptions for the mounted optics set; word for word.

The company name and address are the same as well on both website and ebay page.

Sooo, I believe both pages are the same Meredith. ;)
 
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rocket689 said:
Well, the website and the ebay page have the same pictures and the same descriptions for the mounted optics set; word for word.

The company name and address are the same as well on both website and ebay page.

Sooo, I believe both pages are the same Meredith. ;)
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Wouldn't you think that they would charge more on ebay since all the fee's and stuff.

Nice find.:)
 
I thought so, as well.
But, to my surprise, it was a better deal.

Hey, I'm not gonna complain! :D
 
I had 2 sets in the cart, ready to checkout when I saw they had an Ebay page.
So, I almost bought them at the higher price as well...
Sorry I didn't find them faster. :p
 
Plano convex lenses are found in cosioe projectors.. And i'm pretty sure bi-concaves are also..
Can anyone confirm this? Would the ones found there be unsuited due to the exact dimensions needed? Not an expert on this..
thanks :yh:
 
Humphry said:
Plano convex lenses are found in cosioe projectors.. And i'm pretty sure bi-concaves are also..
Can anyone confirm this? Would the ones found there be unsuited due to the exact dimensions needed? Not an expert on this..
thanks :yh:
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It may be possible with optics from Ka$i0 units, but it would take some time to experiment for effective configurations.
You would also need to design some adjustable mounts for the optics.

P.S. There are still 9 sets on the Ebay page... :D
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices
 
it happens, but i was charged 13 for shipping thankfully not 18

20$ would have really mad me mad LOL
 
bennett326 said:
it happens, but i was charged 13 for shipping thankfully not 18

20$ would have really mad me mad LOL
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Hmmm.... interesting. If I purchased any 1 item, shipping was like $15.90
If I purchased 2 items, it was about $17.80.
3 was like $18.50.

I suppose that shipping price depends on your location. :thinking:
 
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