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FrozenGate by Avery

PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please sub

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Cheap meter, I wonder how well it holds up. The sensor area looks discolored, that has me wondering what's up with that. I keep seeing product names like this which are horrible, no flow, unsophisticated and the range button missing the e. Here in Qatar I see the same silliness with their business names when they translate them to English, just doesn't come out well. Looks interesting, great price, just wish they would do better with the details, makes me wonder how well it was built in every other respect too.

Thanks for the link and photo, it is interesting. Regarding your earlier post about the reflector, I hadn't seen that for laser diodes yet to more closely match the uneven divergences, but sounds right to me, if it's done with glass bending the light into the shape you want through glass densities, you can do the same thing with reflector shape too.
 





Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

These are a great deal, 79 dollars shipped and he has a lot of them:

https://www.ebay.com/itm/Newport-Op...ens-System-Assembly-718-0520-NEW/391962426750

These are meant for a 1.5 um NIR fiber laser input, inside there is a caged lens which slides in and out to focus to infinity. I believe these were made for airport cloud height measurements. There are similar units on ebay with a box mounted on one side, all the box has in it are some mirrors and a IR photodetector. The collimation lens is huge at three inches.

The seller I bought one from a couple of years ago told me they had a "W" AR coating, so they can probably be good for a couple of VIS wavelengths. When I get my LPM set up, I will test to see how much loss through it at R,G and B too, but as beam expanders go, this is as high quality stuff I've ever owned.

Specs from another listing of the same unit:

Designed for 1550nm
Entrance aperture 3”
FC input connector
2W CW operation
Solenoid input voltage 12V
Divergence: 0.8mrad
Click to expand...

It says 2 watt CW is the power rating, but there is nothing in it to cause a problem if running 10 watts NIR, heck, 50, from what I can see. I know, 1.5 um isn't a wavelength we normally see much power in with diodes, but it might work for some other NIR wavelengths where you could run more power.

 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

430nm Diode

Last I chatted, they still have 6 left. Half a grand a piece though...
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Definitely. I bought one.

This is what they have left
428.7nm, 55mW/175mA
428nm 50mW/170mA
428.2nm 55mW/170mA
431.7nm 50mW/115mA
432nm 50mW/115mA
432nm 65mW/180mA
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Oh, they've binned them by wavelength and power. Some seem to be more efficient than others. What wavelength did yours measure and at what current? You might have already told me this, but I didn't realize they were binning them too.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Mine is rated 428nm/70mW @170mA
 
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Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

It will likely stay around there if you heat sink it well. Even at 200 mA. I guess you wanted a lower wavelength one, as I might have looked at the efficiency and picked one out from that. The more efficient ones seem to be a tad higher than 430nm.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

That was the plan, I wanted to go with something lower. Just a hunch these will be bluer than I'm imagining it to be. I could be off, but a 4nm difference also probably won't mean too much in this part of the spectrum
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I guess we'll find out. :yh:
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I bet it'll be quite purple. I have a low 445nm that some (non-laser) people label as purple.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I have a 445nm that measures 443nm. It looks a bit violet next to a higher wavelength 445nm one. It is sort of cool.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I still love 405nm for the color.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Yeah, the higher power ones I can see the beams from. Lower 405nm lasers are not very visible to me. I have an 80 mW one that lights up things that fluoresce, but the beam and dot are nothing to write home about.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Wide price ranges on what looks about the same..

Cheapest was $26--active cooled head and free $hip-- 'claims' to be 5.5W ---5500 mW and both analog and TTL.

well for starters all analog is also TTL.-----*BUT* there is a switch marked 'TTL/analog-'- on several versions..as high as $200

I will meter one asap--(paid today)
another odd thing- in the listing it sez-'used' 'new' and 'brand new'

https://www.ebay.com/i/302773791684...&rk=8&rkt=30&sd=192488753227&itm=302773791684

and focusable.
full description from listing--

Description OF PRODUCTS:

1,Wavelength:445nm~450nm

2,Output Power:5500mW/5.5W (Max)

3,Adjust the focus:Yes(By fingers),<0.5mm;

4,Working Voltage:12V;

5,Power supply:>4A;

6,TTL:Yes (TTL Modulation: Make sure input TTL level PWM dightal signal)

7,TTL signal input 0~5V input.(0V OFF/5V ON)

8,Analog:Yes; (In driver board have one TTL/Analog Change-over switch)

9, Frequency for TTL control:0-20KHz;

10,Duty cycle:input 1%-100%;

11,Cooling mode:Heatsink and Fan

12,Material:Metal

13,Lens:Glass

14,White cable at "+",Yellow cable at "-";(driver board had showing words for "+" and "-")

15,Size:Laser Module:90*40*40mm;Driver board:72*35*28mm;

16,Package:1 X 450nm 5500mW laser module with Analog/TTL Driver board


Features:

* It can adjust the focus(By Fingers),smallest dot <0.5mm;

*Can carving wood (so easy);

*Can be use for CNC;

*It can burn plastic,paper,balloons,cigarettes,wood and so on;

*Pointer distance >5000M;

*Can work continuousely >12
''''

not 100% sure what 10,Duty cycle:input 1%-100%;
^^that means.

ALSO a .5mm spot is small for these lasers afaik..


>>>>>>>>>>>>

OOPs
just noticed that this seller has zero feedback--bye-bye $26
 

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