Gazoo
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- Joined
- Jun 9, 2007
- Messages
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You will be very happy with the acrylic lens. I still have some more testing to do, but it is at least as good of a burner as the Aixiz lens.
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That is the procedure I was hoping for. Yes, I will put it on 250 mA for a while and get my feet wet but I know me. It won't be long until I try to push it just a little. It did not occur to me that each would have such variation. That is the kind of information I need. That tells me I need to be careful even if I am confident of my heatsink and current quality. It also gives me a clue as to what to look for to see the beginnings of failure. That is exactly the kind of experience based info I want.Hemlock Mike said:Pushing a LD to higher power involves using a power meter and other meters to graph the Po / Ild curve and find the knee where added current gives no more output.
Another way to see it is to carefully advance the drive and watch for the beam to start going crazy, bluring, mode hopping, whatever you see going wild --- Back off. Don't do this without monitoring the current and GOOD heatsinking ( or spare diodes!). Running over limits posted elswhere on this forum will shorten diode life. It's a real mix of power, lifetime and sudden death.
I don't recommend going over 250 mA. That will give you a good laser and your diode may max out at 250 mA.
That's why no one gives absolute settings -- every diode is different and that's part of this hobby When you push to the max, you need to do the math.
Mike
Oh Yes !!! What is "off scale" is for you to determine !!! Science at work.
Good news. I wondered about that. I saw that you had swapped out the lens of the Aixiz module on one and saw that the specs for the glass and acrylic lens housing was the same so I figured I had a backup plan. Thanks Gazoo.Gazoo said:You will be very happy with the acrylic lens. I still have some more testing to do, but it is at least as good of a burner as the Aixiz lens.
Good idea. You can see fluctuations better with that. I may also try dropping it onto an old photocell with a large dot just to see what it reads. Not that it will tell me anything other than a comparison value but I don't have a meter in my budget right now and the cell is just sitting in a drawer.Hemlock Mike said:Jes --
My target is black paper -- yes paper ;D
The trick is to not focus it on the beam dump - My dot there is about 2". I focus it pretty good into the wattmeter to make sure all the photons get registered to vote!
Mike
Good news indeed. Sucks about the dead diode though. Be careful with your last LD.Gazoo said:Hello Jim,
Well the good news is even better. From what I am seeing the acrylic lens is a little bit better than the lens in the Aixiz module. Before when lighting white headed matches, I had to aim the beam between the head of the match and the paper to get the match to light. With this lens, when properly focused it will light the match when aimed directly at the head. This is only from a foot away but most of my testing had been fairly consistent, so I am sure this lens is a better burner. And lighting a safety match is so instant it's unbelievable. So we definitely have a winner here..
I popped the Aixiz module off of my heatsink cooler and am going to mount the block on it with my open can diode. The driver in my flashlight maintains current at 240ma's. I want to push the diode a little more and see what it will do cooled. I wish I would not have screwed up the diode I was harvesting last night. I recall slipping with the dikes into the can and I am certain that is what ended it. It is a nice led now..