Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

How to Register on LPF | LPF Donations

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

Wow, beautiful! Tks for posting those pix diachi.

Here's Brad's photo of the spectrometer, I had a hard time finding it again because it was a link, kept going back too far in the thread. Thought it was an embedded pic.



Atomicrox, no problem getting a spectrometer, I bought plenty of these units, 15 total :) I wanted to make sure we nabbed some for members who might want them later, if this spectrometer works out well, if not, I have lots of DPSS project parts!
 
Last edited:





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

Alaskan said:
Wow, beautiful! Tks for posting those pix diachi.

Here's Brad's photo of the spectrometer, I had a hard time finding it because it was a link, kept going back too far in the thread.



Atomicrox, no problem getting a spectrometer, I bought plenty of these units, 15 total :) I wanted to make sure we nabbed some for members who might want them later, if this spectrometer works out well, if not, I have lots of DPSS project parts!
Click to expand...


Kinda want to see if I can fit one of my FC diode bars in one of these housings, with room left over for some optics, Vanadate, KTP etc... Squeeze 3-4W of 532nm out of a host that size.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

If you do that I will duplicate it, I have all of the parts I need already.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
If you do that I will duplicate it, I have all of the parts I need already.
Click to expand...

I only have the diodes, I think the coatings are damaged on my KTPs so they may no longer be good. Still need vanadate, mounts (a milling machine would be nice to have for that...) and mirrors. Still haven't got around to redesigning my diode driver so that it actually works either.

Not sure what bars you have (i.e. a FAP, or raw FC bars like the ones I have, a FAP would be too large I think), I have two of those shown in my signature, they may fit.
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I haven't been thinking about the laser yet, but maybe I should. There are a lot of good parts in one of these. I imagine when more arrive I will be able to make at least one working 473nm DPSS laser. Of course, after I've got the spectrometer working.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Paul, I'd like to see you do that, I will follow that later too :)

diachi, I have some FAP800 units, but I was thinking of using one of my 15 watt C mount diodes, if I can find a way to get its output to be more rounded. I've heard they aren't very good pumps because the power at the edges and center can warp the crystal some causing problems. I was really thinking of everything else, I have a selection of KTP crystals already coated and a few very nice large vanadate crystals too. Lots of other small parts needed too, mounts, TEC's, etc.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
Yep, there weren't any photo's of the spectrometer in there, although that is of interest to me too. I really wanted to see that DPSS module the most right now, I didn't want to ask Paul to open it up, he's already volunteering enough of his time, but truth be known, that was what I wanted to see the most right now.

Although I am hopeful the spectrometer can be used in a range useful to us for VIS, even better if it can go longer, but I'm not too hopeful for even the full vis range right now. I've been wanting a spectrometer for a couple of years, so perhaps my peaked interest in the DPSS portion shouldn't be on the top of my mind.
Click to expand...

Top down pics of the innards of the 473nm setup.

0830171744.jpg



0830171744a.jpg



0830171744b.jpg


EDIT: Same layout as the pics attached to post 4 on that PL thread and their pics are better quality.
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Well, I got the spectrometer out today and then started looking at the pdf files and other information sent along with it. It uses an RS232 connector for interfacing with a computer with applicable software to run this thing. I see a possible problem in that the "free software" to run it might not work at all. This would necessitate someone purchasing the software from the manufacturer. It could, in theory, be shared among all the users of this spectrometer. Well, back to the fight.
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

paul1598419 said:
Well, I got the spectrometer out today and then started looking at the pdf files and other information sent along with it. It uses an RS232 connector for interfacing with a computer with applicable software to run this thing. I see a possible problem in that the "free software" to run it might not work at all. This would necessitate someone purchasing the software from the manufacturer. It could, in theory, be shared among all the users of this spectrometer. Well, back to the fight.
Click to expand...


Why wouldn't the free software work? :undecided:
 
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

I haven't looked at it yet, but after reading what the seller has done in attempting to get it to work gives me pause. They opened the spectrometer and it came up with a large binary compression dump of data at a baud rate of 9600 bps. This caused errors and "distortion of data". It was found that if it was closed and reopened at a baud rate of 115,200 bps they were able to link to MS Excel. I have gone to the B&W Tech website and found BWSpec which looks like it was made to run this without problems. I am still trying to figure out what they sent and if it is even compatible with this spectro. So far, I am not encouraged.
 
Last edited:
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
2 (Two) High Power M140 Laser Diodes 4.2W 2.1W ea. Blue 465nm | eBay

H140? Never seen that one before, says 2.1 watts at 465 nm. Another ebay scam seller or legit?
Click to expand...

He says not the M140 in the descrip, but writes M140 in the title :D

Just read casios 2011 press release for their H series projectors...this caught my eye:

Quote:
Laser & LED Hybrid Light Source
CASIO’s new projectors achieve high brightness without the use of a high-pressure mercury lamp containing mercury, a substance which has a negative effect on the environment, by projecting three colors through a DLP chip – red emitted by a high-lumen red LED, green converted from blue laser light, and blue emitted by a high-lumen blue LED.* The light source has a lifespan of approximately 20,000 hours, reducing maintenance and cutting operating costs. In addition, the projectors reach maximum brightness in no more than five seconds, and no cool-down is needed when turning them off.

- green converted from blue laser light :thinking:

CASIO projectors ? Press
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

jnrpop said:
He says not the M140 in the descrip, but writes M140 in the title :D

Just read casios 2011 press release for their H series projectors...this caught my eye:

Quote:
Laser & LED Hybrid Light Source
CASIO’s new projectors achieve high brightness without the use of a high-pressure mercury lamp containing mercury, a substance which has a negative effect on the environment, by projecting three colors through a DLP chip – red emitted by a high-lumen red LED, green converted from blue laser light, and blue emitted by a high-lumen blue LED.* The light source has a lifespan of approximately 20,000 hours, reducing maintenance and cutting operating costs. In addition, the projectors reach maximum brightness in no more than five seconds, and no cool-down is needed when turning them off.

- green converted from blue laser light :thinking:

CASIO projectors ? Press
Click to expand...


Green is from a spinning phosphor wheel partially covered in a green phosphorescent material. It has gaps for the blue to pass through and phosphors where there aren't gaps. When the blue hits the phosphor you get green light.

Edit: Just ordered for myself:

570 assorted 0805 capacitors
3400 assorted 0805 resistors
1 LTC1257 SO-8 - 12 bit DAC
1 LTC1257 DIP8 - 12 bit DAC
5 TLC271CP DIP8 - Op-Amp
10 TLC271CD SO-8 - Op-Amp
5x IRF540N - Power MOSFET

Gotta love eBay sometimes. Hoping those are all of the other parts I need to get my driver up and running, though I'll need to do some more design/testing. Been a while since I hand soldered SMD stuff too, thankfully I'm not bad at it.
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Love ebay to find parts like that at reasonable prices, if you dig deep enough. What driver is that you are building, for what? On tht "H140" my guess is it's an M140 at 445 nm, not 465.

E: I'm probably going to start miffing some folk off using this thread to chat about ebay stuff instead of posting links to goodies.
 
Last edited:
Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please

Alaskan said:
Love ebay to find parts like that at reasonable prices, if you dig deep enough. What driver is that you are building, for what? On tht "H140" my guess is it's an M140 at 445 nm, not 465.

E: I'm probably going to start miffing some folk off using this thread to chat about ebay stuff instead of posting links to goodies.
Click to expand...


20A digitally controlled diode driver. Going to try and get it working with a single MOSFET instead of a bunch of BJTs. Original design used a 100 position digital pot for control, this one's using the 12 bit DAC with internal 2.048V reference. I've made some other "improvements" too, I'll need to make a few changes to the schematic and ask a couple more experienced people to look over it for me.

20A continuous may be pushing it for a single IRF540 in linear operation, but we'll see.
 
Last edited:
You must log in or register to reply here.


Back
Top