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Very cheap low power 445nm

  • Thread starter Thread starter Deleted member 14843
  • Start date Start date
Stuff I have ordered from aliexpress has arrived in about a week on average.
Where do you live? There may be a member near you with an LPM.
 





During checkout it said 2-3weeks. Maybe they just wanted to give themselves extra time. I'm in Salt Lake City, UT.
 
I'm pretty close... I'm in Phoenix, AZ.

EDIT: And I have a semi-accurate LPM.
 
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Cmendoza, are you planning to keep all of them if they turn out to be on or close to spec?
 
If the output power is close to the 100-300mW they state, I'll take one.
 
:crackup:
Ash said:
If the output power is close to the 100-300mW they state, I'll take one.
Click to expand...

Although you do bring up a valid point, seeing as the description is different than the title, I believe we are looking for a 20mw laser.
 
Yobresal is going to do a full eval on one when they come. I'll probably sell one or two of the others. Fenzir and Ash can have first dibs if I sell! If these are really 445nm and up to spec, I imagine someone will organize a bigger group buy.
 
I hate to say it, but I think you'll find that these are 405s. I've seen 405s labeled as 445s all over the place :(
 
Its not the 445nm diode we use thats for sure unless they have corrective optics in there too. Which they dont.

385880802_261.jpg


Does that dot look like a multimode line to you?
 
rhd said:
I hate to say it, but I think you'll find that these are 405s. I've seen 405s labeled as 445s all over the place :(
Click to expand...

But the driver requires 4.5V. That's too low for a violet if it is linear - and if it were a boost driver, you'd think it would be able to handle a more common 3V supply.
 
Cyparagon:939507 said:
rhd said:
I hate to say it, but I think you'll find that these are 405s. I've seen 405s labeled as 445s all over the place :(
Click to expand...

But the driver requires 4.5V. That's too low for a violet if it is linear - and if it were a boost driver, you'd think it would be able to handle a more common 3V supply.
Click to expand...

That's not too low for a violet. While we're used to seeing 6V as a common Vf for the 405s we build with here, that same wisdom isn't true across the board for 405. The really low powered 405s generally have a Vf of 4.5 or 4.8.
 
rhd said:
The really low powered 405s generally have a Vf of 4.5 or 4.8.
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Add in the dropout from the regulator, and it's not possible.

Even if the regulator had no dropout, it would only be powered for 5 minutes - alkaline voltage sags rather quickly.
 
Lasers came today!!!

They are ......................... 405nm and take 2 AAA batteries :(

Not too big a surprise. I'm contacting them to see if they'll make good.

Yobresal, there's no doubt that they are 405nm. Do you still want me to send one?
 
cmendoza said:
Lasers came today!!!

They are ......................... 405nm and take 2 AAA batteries :(

Not too big a surprise. I'm contacting them to see if they'll make good.

Yobresal, there's no doubt that they are 405nm. Do you still want me to send one?
Click to expand...

That sucks. I really wanted a low power 445
 
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