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Hi, This pinout looks a lot like the pinout used by 405nm laser diodes used for scientific/lab laser sources... Often, the other non-case pin is a built-in photodiode for direct optical power measurement.. Can anyone with one of these do some measurements to see if there is anything connected...

The tube assembly will be light, and comparable in weight to the bare hamamatsu tube, but the real kicker is the HV supply, and associated insulation. I would suggest that this is where the weight will be in your (and in hamamatsu's) design. How many kvp are you looking at for emitted energy? I...

These pics are straight from Sam's laser faq site. I think it is a Samsung mech. The dual lens and optical path is why I am interested in it. Cheers, Pete

Hi, I am trying to identify this sled, since it might be useful in something I am working on. Cheers, Pete

Hi k-shell, This may be a bit off-topic, but the design you are using for x-ray production... Seems like an awfully complicated way to do it. Looks like you have to make the x-ray generating vacuum tube anyway (the thing with the MC plate, electron multiplier and target), so why bother with...

Greets all, I am finding a desperate need for space, and have zero time for tinkering since our new addition to the family arrived 2 weeks ago. I am considering selling off the huge Coherent Innova 20 laser I got a while ago. Since buying it a few months ago, I have tested the individual...

After a bit of investigation, it appears that the 10 digit number is not a batch number, but a unique serial number. I am fairly sure the more significant digits indicate a product line (e.g. their standard part numbers, proprietary builds, etc), and the leas significant 5 or so digits are the...

Unfortunately, there is no definite way to ID which of the Nichia commonly/publicly available datasheets (if any) apply to these harvested diodes. There are no part number markings of any kind (apart from the barcode), either inside or out on these diodes. Pete.

Thanks, I probably should have searched a bit more before posting... I like your design, but it is a little large for my needs. I am looking to construct a laser head with peltier cooling, etc. for microscopy use. I'd like the total diameter of the head to be no more than 1 inch, lightweight...

Just wondering if anyone has developed/is selling a small LD host, with a peltier device and thermistor sensor. Preferably also with a 3 pin socket for the LD package. Pete.

If people can get this quality of monochrome image, I can decode them. The number on the supposed 8x diode is: 1101313481 I have edited my numbers list (earlier post in this thread) to add this one. A clear pattern is emerging. I am wondering if I should start a new thread to track these...

OK, found a tool to manually create a monochrome matrix that represents the 2d barcodes, and I have found that all of them have this 10 digit format number. The earliest diode (pre bluray/hd-dvd diodes) is the Nichia 25mw out of the Coherent Radius. It's number is 1000692694 The next diode is...

@meatball: The reason the pics arent that good (can looks black) is that these were taken with the "joke" microscope (Olympus SZH 10). The illumination (to name just one weakness) leaves MUCH to be desired. At some stage we will rework all the optics on this scope. If we were to use our custom...

Just in case anyone is interested.. Here are some pics of an older (and dead) 25mw supposedly genuine Nichia LD, out of a Coherent Radius 405nm laser. Note the big square pink-looking power monitor photodiode at the rear of the laser chip. Also worth noting is the COMPLETE LACK of ANY...

I've ID'ed the 2d barcode type used on the BDR-205 diode. It's Datamatrix (ECC200), format 1 (12 x 12). This should actually be easier to read than the micro QR codes, since more readers support it. Again, it looks highly likely that it is a 10 numeric digit code, with heaps of error correction...

Hmmm... BDR-205 LD has a VERY different 2d barcode... Not Micro QR, and MUCH smaller. It'd be worth checking if the 6x and 8x writer diodes have this oddball barcode format as well... Pete.

Here's the supposed new Nichia 100mw... Pete.

OK, just took a couple of microphotos of the barcodes from an older (and dead) 25mw supposedly Nichia LD out of a Coherent Radius host, and a supposedly new, supposedly 100mw, supposedly original Nichia LD (it has long leads with no signs of having ever been soldered or used). Maybe someone...

Some more info (from the barcode reader's diagnostic read mode): These laser diode barcodes are: Micro QR code: Version M4 (17 x 17 Modules) Mask Pattern Reference #0, Error Correction level "Q" Data Field: 10 Data & 14 checks in GF(256), 0 erasures and 1 errors I imagine that the error is a...

OK, prepare for a letdown. Read the barcode.. It is a single numerical (decimal) string. It says 1101039184 Probably a batch number. Still, it may help with batch tracking. I'll have a go at reading some of the other ld packages I have, and see if they say anything different. Pete.