40mW Sanyo 635nm LDs on Ebay

[midias]

Looks like the seller stopped selling them

Too bad looks like he ran out. I think he only have about 30 to start

 

[Blord]

He has at least 100 units to start with. In Q&A he offers someone 100 diodes for $2000.

 

[midias]

He has at least 100 units to start with. In Q&A he offers someone 100 diodes for $2000.

True but it looks like he sold out at 32 units for this auction

 

[Braddubya]

I havent found a spec sheet on these but I was reading that if you drive the 5mW 635nm to higher ranges such as 7mW it changes the spectrum to nearly 650nm... is that the same case for these diodes? Id like the high power but its pointless if it changes the spectrum to only a few nm below a standard red.

 

[Blord]

The link to the spec is in the first message of this thread.

 

[Braddubya]

The link to the spec is in the first message of this thread.

duh

Thanks!

According to the spec sheet the diode is already 640nm at anything above 10mW and continues to increase from there. :cryyy:

Im assuming 650nm diodes are similar and operate above 650nm so thats what accounts for the noticeable difference in appearance...or at least I hope.

 

[midias]

duh

Thanks!

According to the spec sheet the diode is already 640nm at anything above 10mW and continues to increase from there. :cryyy:

Im assuming 650nm diodes are similar and operate above 650nm so thats what accounts for the noticeable difference in appearance...or at least I hope.

The spec sheet in the first thread quotes the wave length at 638nm typ at 40mw at approx 20c

 

[Blord]

Dilda 200mW 650nm diode on the right, Sanyo 40mW 635nm diode on the left.

 

[Braddubya]

Wait whats in the middle? They all look the same as far as spectrum to me but I know cameras can be deceiving. A 5mW 405nm on my camera looks as blue as a 445nm.

 

[Blord]

In reality there is hardly differences between the reds but the hue is slightly different. But the camera will noticed the hue.

You should read the other thread, http://laserpointerforums.com/f50/quiz-guest-wavelength-red-laser-58722.html

 

[Braddubya]

Holy over packing!

Diode sandwiched between two pieces of foam inside a hard plastic box wrapped in 5 layers of bubble wrap inside a much bigger cardboard box.

Obviously I cannot complain!


Would one of these drivers be suitable for this diode?

http://cgi.ebay.com/2pcs-constant-c...ultDomain_0&hash=item53e52b7820#ht_845wt_1139

 

[aryntha]

Anyone got a good current for driving these? Maybe 110 - 130mA? Thouigh I'm more interested in 40mW of real 638 than pushing that to say, 60mW of 645.

May try putting one of these in a Jayrob 18650 kit.. Overkill? Sure...

 

[ElektroFreak]

I'd go with the spec sheet. There was one in the picture in the auction.. I zoomed in on it and it lists nominal current at 100mA.

 

[Blord]

I am running it at 120mA continiously in the Sentorch host without problem. I am going to lower the current. Maybe 90mA-100mA. The lower the temperature the better is the color.

Last night I put one in the frige and the red color was very orangish. It was just a one-time test. I want to keep the diode longer life

 

[midias]

Anyone got a good current for driving these? Maybe 110 - 130mA? Thouigh I'm more interested in 40mW of real 638 than pushing that to say, 60mW of 645.

May try putting one of these in a Jayrob 18650 kit.. Overkill? Sure...

Nominal is 100ma for 638nm at 20C. I am driving mine at ~103ma and the color is very nice. Driver below and build thread below

http://laserpointerforums.com/f50/46mw-635nm-pointer-lots-pictures-58578.html#post828074

 

[midias]

duh

Thanks!

According to the spec sheet the diode is already 640nm at anything above 10mW and continues to increase from there. :cryyy:

Im assuming 650nm diodes are similar and operate above 650nm so thats what accounts for the noticeable difference in appearance...or at least I hope.

This diode is ~638nm at 40mw at 20C typical