Quantcast
Channel: Laser Pointers
Viewing all 5560 articles
Browse latest View live

Violet laser 303 gets super weak

$
0
0
Hey there,

I'm in rage, because my second violet laser 303 got extremely weak. I've heard that this often happens to violet lasers.
The biggest problem is that I don't have access to the driver.
Is this repairable and if so, how?

(I've fully charged the batteries)

Ordered some new round bar.....

$
0
0
looks like it's finally gettin' delivered. Anybody want a host that'll hold ~300 18650's? :eg:

[IMG][/IMG]

Hello from Belgium!

$
0
0
Hi Guys,

Greetings from Belgium!.

New around here as you can see.
Registered on this board to get some more info on this stuff but most primarily is that i need to get a high powered lasers(think 3000mW at least)

Why you would ask... for destroying this pest anemones 'aptaisia' in my reef tank.

Stuff is taking over fast...and i need to act fast as well..:gun:

rgds,

Kenny

Ebay sucks

$
0
0
I ordered a 50mW SLD3232VF and what did I receive? -a tiny 5mW diode!
Then I ordered a 200mW SLD2327VF and got the 50mW one (!!!!!!!), which is the least reliable diode ever!! (my 2 dead violet 303s died)
The ebay sellers are simply lying bustards...

Attn Dam drivers: Dam Delays on the Dam Road due to Dam construction

Adjustable Test Load

$
0
0
So I've dabbled with adjustable test loads before, using discrete components. However due to the method of operation the actual V-drop would take some time to actually go into effect, preventing it from reproducing the actual way laser diodes function... Aka, It'd be super high resistance for a split second, and then it would come down to the actual drop you desire.


So, as an alternative...

http://tinyurl.com/gplg4f6

What looks an awful lot like this circuit diagram you might ask?

An LM337 negative voltage regulator.


Since it uses a PNP transistor as its pass element it more accurately represents the way laser diode drops work, at least, in theory.

If anyone has a switching driver, an oscilloscope, the parts, and some extra time I'd be super appreciative if someone could test out my theory! I don't have any switching drivers on hand currently otherwise I'd try it out myself.

If anyone wants to comment, on whether they think this would work or is complete sillyness then please do!

Laser bundle

$
0
0
Hi folks,
Been absent awhile, work keeps coming and I've changed hobbies (race quads). I have for sale two high power lasers. 1 445nm 7w nubm44 @ 5a with a DTR driver and 35mm heatsink in an attack head flashlight host ready to go. Also included a 6+w 445nm diode in a DTR 35mm heatsink, Chinese driver and attack head host ready to build. 1 has 3ele lens, the other a g2. Also includes a survival lasers test load and 2 sets (4) 18350 efest batterys and charger. Both diodes have less than 1 hr burn time. Willing to ship to a trusted middle man. $300 takes all, I'll pay shipping to middle man.
ALL OFFERS CONSIDERED

WILL ALSO INCLUDE: RANDOM LENSES, DRIVERS AND ETC.

Attached Thumbnails
Click image for larger version

Name:	2017-01-06 13.07.41.jpg
Views:	N/A
Size:	76.6 KB
ID:	54298   Click image for larger version

Name:	2017-01-06 13.07.20.jpg
Views:	N/A
Size:	194.1 KB
ID:	54299  

LIGO The Absurdity of Detecting Gravitational Waves


New to lasers, need some help finding one to buy

$
0
0
Recently I've been really interested in lasers. I've been trying to find a green laser that has a visible beam that can light matches atleast, and maybe more. I'm looking to stay within a 70-100 dollar price maximum. Not sure where to purchase or which MW to purchase, any ideas? Thanks!

Strange feeling in eye after using laser ?

$
0
0
Hi everyone !

I have a 1,5 watt 445 laser made by Blord a long time ago, he also sent me some red goggles.(like these 200nm-540nm Laser Safety Goggles - $68.00 : Laser Pointer Store, Your Lucky Laser Pointers, Powerful Laser Pointer for sales)

I always wear the goggles, but i feel like somehow, when I burn something close of me, the intense brightess of the blue laser is affecting me.

it feels like it's tiring my eyes even if i use the laser less than 1 min.

Someone has similar experience ?

I am the new girl

$
0
0
With havin so much content and articles do you ever run into any problems of plagorism or copyright infringement? My site has a lot of exclusive content I've either authored myself or outsourced but it looks like a lot of it is popping it up all over the internet without my agreement. Do you know any methods to help protect against content from being ripped off? I'd definitely appreciate it.

Here is my homepage: borrowing with bad credit history

NUBM08 @ 4A ElectricPlasma build

$
0
0
Just thought I'd show your the current work on a gift I intended for my brother for xmas. This is a top heavy (carbon fiber wrapped potato masher) host that looks amazing! I really think the handle is unique.

I bought a host from ElectricPlasma before Xmas and it arrived ~23rd of December. Under a week shipping, which is a miracle by Canada Post!

Today the diode and driver came in the mail from DTR (Jordan) which is nearly 8 days shipping. Very good considering new years and it being Intl. post etc etc.. !!


Today I polished and cleaned the top of the host so that it had a mirror finish.
I accomplished this with very fine steel wool and some Cerium Oxide polish.
Getting the shine took about a good 45minutes - 1hr by hand.

I am still awaiting one more part to complete the build.
Construction pics and beam shots will come shortly. Stay tuned !

Attached Thumbnails
Click image for larger version

Name:	IMG_1524.JPG
Views:	N/A
Size:	110.0 KB
ID:	54302   Click image for larger version

Name:	IMG_1521.png
Views:	N/A
Size:	486.7 KB
ID:	54303   Click image for larger version

Name:	IMG_1523.JPG
Views:	N/A
Size:	118.8 KB
ID:	54304   Click image for larger version

Name:	IMG_1522.JPG
Views:	N/A
Size:	114.1 KB
ID:	54305  

Greetings!

$
0
0
Hi there LPF!

I've been lurking for a few weeks, reading as much as I can and (I think) learning a ton about this whole laser hobby. I'm starting to run into some questions that I'll post in due time, but for now I just wanted to say "hi!" and introduce myself.

My end goal is to develop a safe method to utilize laser light for a more efficient vaporizer. (Safe being the operative word, of course).

I also just received a 1W 405nm eBay special that I will take some pictures of soon. My next step is to start putting together some pieces to do a real build!

Well, that's it for now--keep the awesome content coming! :thanks:

Fiber coupled laser beam very wide

$
0
0
How would I got about making a 660nm fiber coupled laser that has a super wide beam while aimed at a wall look more like a laser pointer, it is 500mw so I want to make it burn but I'm not sure how to make the beam into a focused point thank you!

Transverse Electric Mode

$
0
0
I've been doing some recent research and studying on lasers and I was just wondering: what exactly is the difference between transverse electric modes? I understand popular diodes like the M140 may transition between different modes, but what exactly makes it so different?

1W 450nm eBay Special

$
0
0
Specs:
450nm
1W (claimed)

Link: New Aluminum 1W 405nm Blue Laser Pointer Pen Power Beam Burn Cigarette + Glasses | eBay

Paid: $50.95 (free shipping)

Purchasing Experience: 2/5
I received the laser ahead of schedule, so that was nice. However, the packaging was done very poorly--the protective foam was just scrunched up and the pieces were jammed in the box. Including The projector filters were just bouncing around loose in the box along with the glasses (for which there was no proper spot). The photos were taken after I unpacked the pieces and repacked them properly.






They also sent me the wrong laser! Inspecting the labelling led me to discover that I actually had been sent a 450nm laser. Return process is underway, so hopefully I'll get it sorted out, but in the meantime, it gives me an opportunity to try out this one too.



Host:
All aluminum construction. Feels pretty solid in my hand though not especially comfortable to hold.
Nicely machined and lubricated threading.
Power button is on the back. It's a toggle switch with a rubber cover and a nice "click".

Batteries: 2x16350s included. The cheap no-name blue ones.

Lens: Probably acrylic? (I don't know how to tell)



Diode: Not too sure what they've stuck in this guy, but again, here's a picture:



Beam:
I don't have a way to measure the beam strength, unfortunately, but I do have pictures:




Summary: I feel like I got a pretty solid deal for what I paid, despite the obvious cheap components.

Well, hopefully you liked the pictures, even though my text wasn't very helpful!

Thanks for reading! :beer:

M-140 Driver Question

$
0
0
Hi LPF,

I'm working on assembling some pieces to do a 510 thread mech mod build, and I'm pretty sure I'll pick up an M-140 unit from DTR's shop: https://sites.google.com/site/dtrlpf...m-h1650-diodes

However, I'm not sure which driver to go with... :thinking:

Of the pre-built modules, there's the X-Drive and the Nano drive. On DTR's website it says they both take an input voltage of 2.5-6V, but the Driver Compendium thread lists the X-Drive as 3.7-16V. I'm assuming this is the bucking version, otherwise it would be listed as the X-Boost? There was no info I could find about the Nano drive.

From what I'm seeing it looks like this diode should be driven at about 4.9V for maximum output. So I'm thinking I should either drive it with 1x18650 and a boost driver, or 2x18350s and a buck driver.

Can somebody help me understand what would be the optimal setup, and which of the options that DTR offers would be the most appropriate?

Thanks in advance! :o

Mirror cutting

$
0
0
I would be interested, how many Watts it takes to burn through a mirror. 1kW lasers are known to manage it, however I've seen a couple of vids, where blue lasers do the job.

How to deal with Trolls (& scammers)

$
0
0
Need I say more... you must watch from beginning to end.
This is brilliant! :beer:

Brought to you by TED..


My DIY orange laser

$
0
0
Here I'd like to share my experience of building a real orange laser! this is a pulsed laser, that uses pure neon as a lasing medium. As far as we know, pure neon can lase only at one IR line in CW mode, mixing it with helium is needed to get visible output. Red he-ne lasers are the most widespread, he-ne of other colours are much more rare, their gain and output power are low. But everything changes when you apply high voltage very short pulses to the tube with pure neon. It begins to lase at various wavelengthes including red (626 nm), orange (614, 594 nm) and green (540 nm)!! Moreover, lasing is superradiant without any mirrors, because gain is extremely high! On the other hand, output pulses are very short (approximately 1 ns), pulse energy is quite low too. Anyway, the simplicity of the laser motivated me to try to make one. I had a broken LE Nitrogen laser tube and brought it to the local neon sign shop. I asked the glassblower to fill it with pure neon at the pressure of 1 Torr or somewhat lower. The appendix on the tube is the getter, to burn the crud out from the gas. Then I installed this rebuilt tube into the nitrogen laser frame, removed the mirrors and attached it to the nitrogen laser supply. And it works! The lasing line is 614 nm, as it is the strongest one according to russian literature. When I split the beam with the diffraction grating I didn't find any other lines. Lasing is superrardiant, adding mirrors doesn't affect performance. The high voltage pulse should be shorter, on the PSU with "fresher" thyratron lasing was more stable and brighter.

Here is the video from youtube: https://youtu.be/42HIzaLnx40

According to the same literature it is worth trying to fill with neon old long (at least 1 meter) He-Ne tube as it can give good lasing at green 540 nm line. Only after building this unit I found Mark Csele's article about building a neon laser from small he-ne tube.

And here are some photos of my setup.

Attached Thumbnails
Click image for larger version

Name:	DSCN3265.JPG
Views:	N/A
Size:	291.5 KB
ID:	54307   Click image for larger version

Name:	DSCN3267.JPG
Views:	N/A
Size:	225.2 KB
ID:	54308   Click image for larger version

Name:	DSCN3272.JPG
Views:	N/A
Size:	237.1 KB
ID:	54309   Click image for larger version

Name:	DSCN3273.JPG
Views:	N/A
Size:	209.3 KB
ID:	54310   Click image for larger version

Name:	DSCN3279.JPG
Views:	N/A
Size:	403.3 KB
ID:	54311  

Click image for larger version

Name:	DSCN3289.JPG
Views:	N/A
Size:	278.9 KB
ID:	54312   Click image for larger version

Name:	DSCN3293.JPG
Views:	N/A
Size:	282.3 KB
ID:	54313   Click image for larger version

Name:	DSCN3294.JPG
Views:	N/A
Size:	356.7 KB
ID:	54314  
Viewing all 5560 articles
Browse latest View live