DTR
0
- Joined
- Jun 24, 2010
- Messages
- 5,680
- Points
- 113
2W M140 445nm Laser Diode
It occurred to me I don't have a testing thread up on the M140 even though it has been with us for a long time so here is one I threw together tonight and I will update it with more info soon. This can be a thread for testing and general discussion on the M140 diode.:beer:
There are a lot of used diodes out there being sold as new. Here is a quick guide to make sure you know what you are getting. First the spacer can tell a lot. There have been three spacers that have been used on the M140. First was the short spacer these were used from 2010-2012 for about a year and a half before being phased out. If you receive a short orange spacer there is near zero chance the diode is not pulled from a used high mileage projector. Second is the long orange spacer. These were in blocks from 2012 to the beginning of 2015 when production in China was ceased and moved to Japan. It is possible that you could see a diode pulled from a new projector with this spacer but it is getting very rare to find new stock projectors someone has been sitting on for over a year now. The current projector is manufactured in Japan and has a red spacer that is plastic very hard compared to the soft orange rubber spacers from the ones made in Japan. Your diode if purchased as new it really should have this spacer. The picture does not show it as well as I would like but in person you can pretty easily pick them out by eye.
Here is a quick power test on the M140 using a G-2 glass lens.
Here is a thread showing when we first discovered this diode.
A-140 vs. M-140 vs. H1600
Here are some pictures of the guts of this new diode next to the old.
The M140 on the right, A140 on the left.
The A140 had three bond wires to carry the current.
The M140 has four bond wires giving it the ability to run at higher currents and have greater ouput.
On the M140 there is a circle above the bar code. This is on the back of the diode right next to the pins.
It occurred to me I don't have a testing thread up on the M140 even though it has been with us for a long time so here is one I threw together tonight and I will update it with more info soon. This can be a thread for testing and general discussion on the M140 diode.:beer:
There are a lot of used diodes out there being sold as new. Here is a quick guide to make sure you know what you are getting. First the spacer can tell a lot. There have been three spacers that have been used on the M140. First was the short spacer these were used from 2010-2012 for about a year and a half before being phased out. If you receive a short orange spacer there is near zero chance the diode is not pulled from a used high mileage projector. Second is the long orange spacer. These were in blocks from 2012 to the beginning of 2015 when production in China was ceased and moved to Japan. It is possible that you could see a diode pulled from a new projector with this spacer but it is getting very rare to find new stock projectors someone has been sitting on for over a year now. The current projector is manufactured in Japan and has a red spacer that is plastic very hard compared to the soft orange rubber spacers from the ones made in Japan. Your diode if purchased as new it really should have this spacer. The picture does not show it as well as I would like but in person you can pretty easily pick them out by eye.
Here is a quick power test on the M140 using a G-2 glass lens.
Here is a thread showing when we first discovered this diode.
A-140 vs. M-140 vs. H1600
Here are some pictures of the guts of this new diode next to the old.
The M140 on the right, A140 on the left.
The A140 had three bond wires to carry the current.
The M140 has four bond wires giving it the ability to run at higher currents and have greater ouput.
On the M140 there is a circle above the bar code. This is on the back of the diode right next to the pins.
Last edited:
I really appreciate the info you share. Sometimes I get readings that don't seem right. First thing I do is "go see what DTR got". Helps me a lot. Thank you. :beer:
