received 2 different color aixiz lenses??

[sometoymachine]

Poop. I hate to bug people, but I need that lens. :-/ Well thanks for your help everyone.

 

[hakzaw1]

^^^ I can replace that for you- send a PM w/ your addy-- I owe AixiZ a lot of favors- btw all 'wrong coated' lenses got or can be replaced. afaik the ones going out now are all good..

 

[hakzaw1]

Actually this might not be true. If it was one of the 445 batch that ended up with the wrong coating, it's fairly useless for both 405/445 AND reds.. I had of the few of the miscoated ones and I thought the same.. that I could just use them for reds, but when I tested them on 660's, their performance was way below even the uncoated acrylics that come with the aixiz modules.


If you ordered a 405/445 lens and got a blue tinted one, get it replaced.

If you read the reviews on testing you will see that the acrylics out -preform the glass, but in a 445 diode they absorb heat- darken-- then absorb even more and then smoke and melt-not a good thing-(Greenmechanic saw smoke at 40 seconds of the first run at 1 W)_-- but more mWs until that happens.
glass is more scratch resistant and is cleanable- plastic --not so much.

 

[qumefox]

If you read the reviews on testing you will see that the acrylics out -preform the glass, but in a 445 diode they absorb heat- darken-- then absorb even more and then smoke and melt-not a good thing-(Greenmechanic saw smoke at 40 seconds of the first run at 1 W)_-- but more mWs until that happens.
glass is more scratch resistant and is cleanable- plastic --not so much.

I was referring to using the wrong coated (blue tinted) 405/445 lenses for 650's.. Not 445's. Reds shouldn't UV damage acrylic like the blues do. I was just saying the wrong coated 405/445 lenses suck no matter what the wavelength and should be returned/replaced.

Though I really hate that aixiz ditched their old 405 coating.. At 405, it was about 15% better than acrylic. The new broadband coated for blues perform about the same as acrylic.

 

[hakzaw1]

^^^ me too -no more half thread 405s from AixiZ( i asked) altho some are still in stock from other sources--maybe O-like?

 

[sometoymachine]

Hakzaw, thanks so much for the lens. That was really nice of you to send it to me. I noticed that the one you sent has what appears to be a deeper retaining ring in it than the typical aixiz glass lens. Is this a modified lens assembly, or am I seeing things?

 

[daguin]

This lens question is really more complex that "red vs. blue."

In addition, there are several variations of the lens nut.

Test the lens with a laser and an LPM.

Peace,
dave

 

[Benm]

Afaik there are (at least) 3 aixiz glass lenses that are very similar in dimensions etc on the market, but have different coatings:

- designed for red
- designed for 405 nm
- designed for 400-450 nm

Telling the difference between them is not very easy by just looking at the coating. Depening on the angle your are look from, the color is different since these are dielectric coatings.

I don't know if looking at details in the metallic part of these lenses would be helpful either - they all seem to be more or less the same as far as the room for the actual glass lens is concerned, so its feasible that lenses coated for a specific wavelength are sold in slightly different metal enclosures.

Unfortunately aixiz does not mark their lenses for their intended wavelength, so if you mix them up, the best way to find out which is which is probably simply trying each one with a power meter.

 

[qumefox]

I just know the batch of aixiz 405/445 lenses I ordered that had the bluish coatings sucked bad both 405nm (15%-22% WORSE than acrylic testing the lenses I had) and 650nm (24%-33% WORSE than acrylic)

The correct yellowish coated aixiz lenses scored right around the same as acrylic at 405nm, but still sucked at 650nm, as expected.

 

[Benm]

Are you sure you didn't swap them around?

You can somewhat guess the nature of the coating by looking straight onto the lens with a lamp behind you. The color reflected should be opposite of the color the lens was designed for.

With the 400-450 coated lenses it should be yellowish, with the 650 lenses is should be bluish.

But this only works when you have the light source behind you, so you're looking at a reflecion close to a normal angle. If you look at the coating from the side, it could be totally different.

 

[sometoymachine]

My lens situation has been cleared up now. The original was correct. The replacement was yellowed, so it was the wrong coating. Hakzaw1 cleared it up though. Sent me the correct lens. Still, I was wondering why the lens nut retaining ring was a lot deeper than the other. Didn't know if anyone else had receive a slightly different lens.

I unfortunately won't have access to a power meter. Would be interesting to see if there was a difference though.

 

[qumefox]

Are you sure you didn't swap them around?

You can somewhat guess the nature of the coating by looking straight onto the lens with a lamp behind you. The color reflected should be opposite of the color the lens was designed for.

With the 400-450 coated lenses it should be yellowish, with the 650 lenses is should be bluish.

But this only works when you have the light source behind you, so you're looking at a reflecion close to a normal angle. If you look at the coating from the side, it could be totally different.

No I didn't swap anything around, and the sample size was 10 'blue' 405/445 lenses and 10 'yellow' lenses. the 'yellow' lenses were ok at 405 but sucked at red, as they should, while the 'blue' lenses sucked at both. However the proper aixiz glass 650nm lenses did ok at reds, again, as they should. So i'm not sure what wavelength the wrong coated 445 lenses were coated for, but it certainly wasn't 405 or 650.