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

Good to hear that!

I hope the post will not damage it on its further journey over the atlantic

Hey benm ill try to pick up a flare rate box and bubble wrap today (Friday) and get it to you ASAP but I don't have your address :yabbem:

Just pm me

bennett326 said:

Hey benm ill try to pick up a flare rate box and bubble wrap today (Friday) and get it to you ASAP but I don't have your address :yabbem:

Just pm me

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A FLARE rate box???

Benito,
You may get burnt...
AND afaik you cant send by flat rate anyway.

The listing. btw, describes some small chips , but none that would make these unusable.
I would suggest you to re=wrap well to avoid any new ones.


The two FS mirrors may be handy if you plan a Lab build like BBs.

enjoy!!!

Hak:na::wave::crackup:

hakzaw1 said:

A FLARE rate box???

Benito,
You may get burnt...
AND afaik you cant send by flat rate anyway.

The listing. btw, describes some small chips , but none that would make these unusable.
I would suggest you to re=wrap well to avoid any new ones.


The two FS mirrors may be handy if you plan a Lab build like BBs.

enjoy!!!

Hak:na::wave::crackup:

Click to expand...

:crackup: :crackup: LOL

and way ahead of you i packed this thing to where you could sit on it and it would be ok

oh and dont worry i wore my fire resistant gloves :tinfoil:

BTW there are flat rate int. boxes it cost 13.95 for a small one max weight 4 pounds. it was cheaper than using a regular box....

Yes USPS flat rate boxes work for international shipping. There is just lower weight limits and they cost more, but it's still usually cheaper than trying to do a normal express mail package.

USPS flat rate is pretty much the cheapest way to ship internationally and have tracking. Your only other option that's cheaper is a first class mail parcel. But there is zero tracking options with that.

qumefox said:

Yes USPS flat rate boxes work for international shipping. There is just lower weight limits and they cost more, but it's still usually cheaper than trying to do a normal express mail package.

USPS flat rate is pretty much the cheapest way to ship internationally and have tracking. Your only other option that's cheaper is a first class mail parcel. But there is zero tracking options with that.

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Tracking.? How.? I was told you can not get tracking international unless you ship Express mail.

Priority mail i cannot get tracking on this where iam at.:thinking:

How do you get tracking on priority mail.?

PS. I don't ship using On-line labeling and stuff. I do it by hand.

lazeerer said:

Tracking.? How.? I was told you can not get tracking international unless you ship Express mail.

Priority mail i cannot get tracking on this where iam at.:thinking:

How do you get tracking on priority mail.?

PS. I don't ship using On-line labeling and stuff. I do it by hand.

Click to expand...

You have to physically go to the post office and request your priority mail package be "registered" to get tracking, it also provides some insurance coverage I believe. Not very cheap, starts at like $10.50 per package, which almost makes EMS mail a better choice for only a few more dollars. I print my labels at home so that's not an option, only EMS comes with tracking that way. When printing out your own international priority mail labels they give you what's called a "tracking" number but it's really just a customs number that no one scans for us. These usually being with the letters LJ, the only thing I ever see updated is the post office's "acceptance" of the parcel, so you can at least prove you shipped it.

clif said:

You have to physically go to the post office and request your priority mail package be "registered" to get tracking, it also provides some insurance coverage I believe. Not very cheap, starts at like $10.50 per package, which almost makes EMS mail a better choice for only a few more dollars. I print my labels at home so that's not an option, on EMS comes with tracking that way. When printing out your own international priority mail labels they give you what's called a "tracking" number but it's really just a customs number that no one scans for us. These usually being with the letters LJ, the only thing I ever see updated is the post office "acceptance" of the parcel, so you can at least prove you shipped it.

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Ah ok, thanks for clearing that up, Clip.
I was always told I could not get a tracking # for priority packages going international.
However, I print my postage...

Funny story about the "LJ" customs codes;
I ordered some components from Moh earlier this week.
USPS sent me a notification saying that it was an "international package" and it had a "LJ" code. :thinking:
I'm interested to see where it goes.... :crackup:

rocket689 said:

Ah ok, thanks for clearing that up, Clip.
I was always told I could not get a tracking # for priority packages going international.
However, I print my postage...

Funny story about the "LJ" customs codes;
I ordered some components from Moh earlier this week.
USPS sent me a notification saying that it was an "international package" and it had a "LJ" code. :thinking:
I'm interested to see where it goes.... :crackup:

Click to expand...

Perhaps someone out there will get a free laser surprise package in the mail from Moh :san:
Hopefully it was just some freak error or something.

clif said:

Perhaps someone out there will get a free laser surprise package in the mail from Moh :san:
Hopefully it was just some freak error or something.

Click to expand...

Yea. Lol.

It wasn't anything exciting...just a handful of SMD resistors.
I hope it was an error, though.

I dint know where to post this So i figure this would be a good place since it has to do with cheap Optics.

So I dint really know what i was doing with correcting the beam so big thanks to Bionic-Badger for all the help he gave me. He is a Great Guy.:beer:

So I wanted to pick up some Correction optics that i can put in a Host. The ones from MI just would not fit. So Bionic-Badger reminded me about Surplusshed.<<< Great store.:bowdown:

So Going through there site i picked up these 3 cylindrical lens.

Plano Convex Lens:PRECISION PCX CYLINDRICAL LENS 19MM X 25MM, 19MM FL - Surplus Shed

&

2 Plano Concave

PRECISION FUJI 13MM SQUARE PCV CYLINDRICAL LENS -17MM FL - Surplus Shed
PRECISION PCV CYLINDRICAL LENS 25MM X 13MM X -12.7MM FL - Surplus Shed

They did not have any double concave lenses that would work for my purpose so Bionic-Badger said these should work also but might have less focus. But they do work Just fine.

I also on a side Note have a set of DR. Lava correction optics coming too. Cant wait to get those in to try out.


So Like I mention before I have Never done this before and my setup was ruff just to get a feel for it but i can say that these optics work Great.

I paid a total of ~$22 for them with the discount last week but regular price if you want to play around with them to see what you get is ~$27 Shipped in the USA.

So My test setup was Using a 405-G-1 Lens. As i I plain to suck out as much power as i can from the diode then correct it. I dint have my 650-G-1 lens at the time so here where the results i got.

I got ~10% Loss. With Both of the Plano Concave lenses. Not bad at all.

Here was the First Setup:







So you all remember my first tests of the 500mW ML501P73 here:
http://laserpointerforums.com/f50/first-look-500mw-mitsubishi-ml501p73-635nm-638nm-diode-69702.html
Here was a Picture taking of the 405-G-1 lens before correction:

At 76mm.


Now Corrected::wave:


I was so Impressed with this. The Optics where 4 inches way from the aperture and the G1 lens was focused to infinity. I have not yet testing with an AixiZ lens but i will latter on for you guys. Again my setup was Not perfect so results might be better when i get it properly setup.


Also I noticed something that there more away i put the optics the better the Correction turned out.

Here was this setup with the Other Optic: "10 inches away"


The Results:


It was Much Harder to get it right on this setup. There was times where i got the dot as low as 27mm but had had stuff coming off the dot so i was not sure if that was normal for it to do that or i dint have it lined up correctly or what so the 32mm you see corrected was with a clean "dot". Iam going to play around with it more and see what i can get. Both the optics produce nearly the same correction. I dint test the smaller one in the second setup much but to the eye they are about the same.


This is all i have for now. Its really fun doing this and very Exciting when you get it right and you see the correction. SO with these optics once i find the sweet spot for them i will post so more numbers and pictures.

Hope this Helps at all.

Thanks For Looking. :beer:

Hey that's nice work! I grabbed one of those Fuji plano-concave lenses but didn't have any convex lenses with a shorter focal length except that one lens on the long brass holder in that Mi-Lasers kit that I had to turn sideways. It seemed to work, but not great. The results you have are pretty good.

Can you measure how much loss you get right after the concave, and then after the convex? I was hesitant to get one of those convex ones because it states that it is uncoated. A coated one might give you an extra 5% or so.

Also, how far from the aperture is that beam spot? Is that like 40ft?

On another note, I wish I didn't have to "spread around" rep before giving more to the people I want to.

Looks nice too!

How did you determine the proper distance between the two lenses? Just by experimentation, or did you manage to calculate the distance vs beam reduction?

Bionic-Badger said:

Hey that's nice work! I grabbed one of those Fuji plano-concave lenses but didn't have any convex lenses with a shorter focal length except that one lens on the long brass holder in that Mi-Lasers kit that I had to turn sideways. It seemed to work, but not great. The results you have are pretty good.

Can you measure how much loss you get right after the concave, and then after the convex? I was hesitant to get one of those convex ones because it states that it is uncoated. A coated one might give you an extra 5% or so.

Also, how far from the aperture is that beam spot? Is that like 40ft?

On another note, I wish I didn't have to "spread around" rep before giving more to the people I want to.

Click to expand...

Thanks. Could not have done it without your Help.

Sure I can test Each lens separate and let you know the Loss difference. Ill test all 3 that i got. When I get off of work today i will test the Power Drop for each lens for you and report back.:beer:


Its the Exact same distance from my other thread that i did. Its A little over 20 Feet.

Also i want to mention that last night i tested a 445nm laser with a 405-G-1 lens and here is the "Dot" at the same distance a little over 20 feet. "This is Un corrective."

Un-Corrected 445nm "Dot" at 20 feet with a 405-G-1 Lens.


So It appears that with a Little More Precises aligning i might be able to get it to be Exactly or very close to how a 445nm Dot Size with a 405-G1 is. Which Is Not bad at all considering its a Multi-mode diode.

Benm said:

Looks nice too!

How did you determine the proper distance between the two lenses? Just by experimentation, or did you manage to calculate the distance vs beam reduction?

Click to expand...

Thanks.

Since this was my first time attempting anything like this it was all experimenting. I found that "Still not 100% positive on this" with these optics the sweet spot between having the lenses be way to far out and not being able to fit it inside a handheld or to close to the aperture where its not doing much correction that ~4 inches from the Aperture is the sweet spot.

This Sweet spot is Right in the Middle when the "Fast Axis" When holding it Vertical slowly turns to Horizontal."If that makes any sense" "Please correct me if this is not the fast Axis".

I think with the optics i tested with from "SPS.com" this is the Best spot to use them at if your setup is going to be in a handheld. However As seen in Post # the feather away i go from the aperture with the lenses the better the correction is. Its not Much of an Improvement but if your setup will allow it i would experiment more with a longer position to see what you get.

Since iam attempting to put this in a handheld, i was going for as short as focal length as possible with the best correction i can get.

When i get my 650-G-1 lens back iam going to see what results i get with that. The 650-G1 give a ever so slightly smaller "Dot" then the 405-G-1 lens. Hopeful i can get better results with.

I will test with a 3 element lens tonight also for you guys.

Dr.Lava Optics should be in any day now and will be nice to see if they will work any better then these. I will Update when they get in with Results.

Theoretically:

The MI optics from the OP have something like 4x magnification and a subsequent 75% reduction in divergence.
The Dr. Lava lenses have a 3x magnification and a subsequent 66% reduction in divergence.
You should be getting 1.3x magnification and a subsequent 23% reduction in divergence.

Cyparagon said:

Theoretically:

The MI optics from the OP have something like 4x magnification and a subsequent 75% reduction in divergence.
The Dr. Lava lenses have a 3x magnification and a subsequent 66% reduction in divergence.
You should be getting 1.3x magnification and a subsequent 23% reduction in divergence.

Click to expand...

For what optics.? Iam confused.