445nm in a Jayrob Key Chain Host

While I was building over the weekend, I built a little something for me. I had a Jayrob Key Chain host here.

http://laserpointerforums.com/f64/fs-key-chain-cr2-build-kit-schweet-42773.html

Also, I wanted a lower output 445nm laser. With the Jayrob Key chain host taking only a single CR2 battery, this seemed like just the ticket.

I set the driver at only 275mA. It is putting out 50mW with the stock AixiZ acrylic lens. I'm not too worried about the survival of the lens at 50mW

Without further ado, here's the pics





There is some smoke in the air here



At 50mW (after lens) there are still multiple lines in the raw output. I'm going to try making an actual lecture pointer at even lower current. We'll see if it will go down to a single line at lower current


This was a fun one.

Peace,
dave

Very cool build

What's the lasing threshold for the diode? Would make a very cool lecture pointer!

You should throw on an ez focus adapter for some ez focusing at your lecture, NIce build as always Dave.
-Sarge

Asherz said:

Very cool build

What's the lasing threshold for the diode? Would make a very cool lecture pointer!

Click to expand...

The lth is ~200mA

dieselmarine said:

You should throw on an ez focus adapter for some ez focusing at your lecture, NIce build as always Dave.
-Sarge

Click to expand...

For a lecture pointer, I use a fixed focus ("infinity") and a momentary switch on the side. This one has a "clicky" in the tail

I have to wait for some more flexdrives to arrive to build the lecture pointer

Peace,
dave

Very nice.

I have been wanting to do one in a 10280 keychain but I settled for a 10440 SS host that is on the way that I plan to set around 500mA.

Maby you could try the 10280 keychain for your lecture pointer? It has a momentary switch.

^ Or put it in a Leadlight host, i'll bet it will look incredible with ~50mW of 445nm coming out of it

Nice one Dave...

Hey at 50mW's in the dark, is your 445 Key Chain still visually brighter than a class 4 12X?

Edit: I see you answered this question in the other thread... (sorry about asking twice)
Answer: http://laserpointerforums.com/f65/list-445nm-diodes-51897-6.html#post762135