First 445nm laser

keyblade95 · Jul 14, 2015

Hi! I've recently bought a 1.5W 445nm laser diode: it works with 1-1.2A, but no informations about voltage or model. Another questions is what I've to use to focus... Aixiz module can be useful?
I'm quite noob, but more interested and fascinated with lasers :angel:

marcuspeh · Jul 14, 2015

To power the driver, you will need a constant current driver. As for the voltage, it will be around 4.5V to 5.5V for a 445nm laser diode. Just keep in mind that the voltage doesn't really matter as long as the voltage is in that range. Read all the stickes and you should be able to get your answer. For the model, please post the link where you bought the diode from?

fedris321 · Jul 14, 2015

nice new laser.,.
i thinks that's really good...

keyblade95 · Jul 14, 2015

marcuspeh said:
To power the driver, you will need a constant current driver. As for the voltage, it will be around 4.5V to 5.5V for a 445nm laser diode. Just keep in mind that the voltage doesn't really matter as long as the voltage is in that range. Read all the stickes and you should be able to get your answer. For the model, please post the link where you bought the diode from?

I've already got it, it's a variable current regulator capable of support up to 1.8-2.0A. I bought the diode on eBay and the object is no more available now :can:

nice new laser.,.
i thinks that's really good...

Thank you.. Hope to make a good build :thanks:

keyblade95 · Jul 15, 2015

How can I focus the laser? When I put the diode in the aixiz module and I insert 3 element glass lense, the beam is a big circle. Else I'm able to focalize only at a 2/3 inches if I screw completely the lense...

doubleone44 · Jul 15, 2015

Have you tried the lens the other way around? It is probably reversed.

KrowBar · Jul 15, 2015

Unfortunately you haven't given us enough information to be of much help to you. To focus your laser you will need to place a collimating lens the correct distance (approximately the focal length of the lens) from the diode emitter. You might try flipping the lens around if the current orientation does not allow it to get close enough to the emitter. If you can include some pictures and measurements then we might be able to better help you with your issue. For the time being, an unfocused laser might be safer while you wait to get some safety glasses.

marcuspeh · Jul 17, 2015

fedris321 said:
nice new laser.,.
i thinks that's really good...
http://xxxxxxx.xxxxxxx/29/o.png
http://xxxxxxx.xxxxxxx/28/o.png

Just wondering can anyone see the image he linked? It looks like a tracking img to me

mikeylee25 · Jul 17, 2015

Sometimes the original lens for the module you bought is too small and not enough precision. I purchased lens that is a little bit longer than the original that came with it and it made my focusing more precise. Make sure you buy the correct lens for your module though. Hope that helps

Pi R Squared · Jul 17, 2015

marcuspeh said:
Just wondering can anyone see the image he linked? It looks like a tracking img to me

No not visible your right, don't quote posts that have those images.

mikeylee25 said:
Sometimes the original lens for the module you bought is too small and not enough precision. I purchased lens that is a little bit longer than the original that came with it and it made my focusing more precise. Make sure you buy the correct lens for your module though. Hope that helps

Most lenses have a lens barrel that are 10mm length, some are only 8mm and those are mostly the acrylic lenses and are short enough that they have to be screwed in almost all the way and you may not be able to use a focus ring with AixiZ type modules. The 10mm length lenses are much better. There used to be some that were even longer from DTR but he hasn't had them for a very long time. If the lens is a little loose and the internal lens spring isn't enough to keep it tight, you can try the external lens springs sold by Survival Laser or you can use a tiny amount of Teflon/plumbers tape on the lens threads.

Alan

keyblade95 · Jul 17, 2015

Most lenses have a lens barrel that are 10mm length, some are only 8mm and those are mostly the acrylic lenses and are short enough that they have to be screwed in almost all the way and you may not be able to use a focus ring with AixiZ type modules. The 10mm length lenses are much better. There used to be some that were even longer from DTR but he hasn't had them for a very long time. If the lens is a little loose and the internal lens spring isn't enough to keep it tight, you can try the external lens springs sold by Survival Laser or you can use a tiny amount of Teflon/plumbers tape on the lens threads.

Alan

Yesterday I bought this:
http://www.amazon.com/gp/product/B00B6DOA0G?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
As can you read in the product description, it should be the correct length (10mm), right?

Pi R Squared · Jul 17, 2015

keyblade95 said:
Yesterday I bought this:
Amazon.com : 405-G-2 Glass Lens for Aixiz Laser Module 405nm 445nm : Other Products : Everything Else
As can you read in the product description, it should be the correct length (10mm), right?

Yes it should be.

Alan

mikeylee25 · Jul 18, 2015

The lens i bought seems like there is an internal screw of the lens. The side thats inside the module, tried turining but cant turn.is it possible to turn?

marcuspeh · Jul 18, 2015

mikeylee25 said:
The lens i bought seems like there is an internal screw of the lens. The side thats inside the module, tried turining but cant turn.is it possible to turn?

Where did you get the lense and the module?
If you are using Aixiz housing or any other standard module, the lense holder should be m9x0.5 thread

Pi R Squared · Jul 18, 2015

mikeylee25 said:
The lens i bought seems like there is an internal screw of the lens. The side thats inside the module, tried turining but cant turn.is it possible to turn?

You mean the one in the lens itself? Yes but that just holds the lens together, if you are able to unscrew it you can take the lens apart.

Alan

mikeylee25 · Jul 18, 2015

That doesnt help with the precision? To make the point more focused?

First 445nm laser

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