Having trouble focusing Blu-ray

[desslok]

Hi all, I got my Blu-ray working last night, but I can't seem to focus it down. Seems like the smallest I can get the spot is about 8mm. Now it's in an AIxiz housing and the lens has had the opening enlarged inside, where you cut the little hole in the black plastic bigger. Is that would could be causing this? It does this no matter how much current. I have tried it from about 26 mA to about 37. I tried to take a picture but it seems to overexpose and you can't really make out the dot. I have 2 more aixiz housings on the way. Does anyone else have any other ideas.

Thanks in advance,
Steve

 

[member02]

try another lens, or try removing lens assembly and looking at the lens yourself... I'm suggesting the lens is the fault, i've seen how easy these plastic lens' can be ruined.

take a picture of the laser projected onto wall without lens, and a picture of the laser with the lens focused to make a dot about 3-4"s wide

this will help us figure out what's the problem.

 

[desslok]

Seems I need to use a better camera, the webcam i am using just seems to be blinded by the light, can't really make out the dot.  When I remove the lens altogether, I get a large circle with a noticably brighter "band" down the center, but it basically blinded the camera completely.  The pic below is of the dot adjusted to about 3-4 inches as suggested.

 

[rog8811]

All of my bluerays have focused when the lens is around 1/2 to 3/4 of the way into the housing, the difference between big dot/fine dot is a fraction of a turn of the lens. ..... is the window on the LD in place??? I have one where the lens was broken so I removed it, the dot on that one is a lot messier than the others...

I hope that is of some help.

Regards rog8811

 

[jake21]

i just got my br diode from the gb and it works great but it has brite that looks yellow around the dot?

 

[chido]

i just got my br diode  from the gb and it works great but it has brite that looks yellow around the dot?

What current are you driving it at, I heard that happens when you don't put enought current in it.

 

[rog8811]

That is certainly what I found with my first blue ray, uped the volts and the yellow went away..

Regards rog8811

 

[desslok]

Dang. found out why I was having trouble focusing it. It was in the housing crooked. I left the circuit board on so I couldn't really tell just how crooked it was.

 

[jake21]

i dont no how to read my meter yet on how to check current here is a pic of my meter and where do i measure current on my driver

 

[jake21]

on the right side the red wire is going to the batt the balck also, on the left is going to be hooked to the br so when i have it hooked up to the br, what wires do i measure from for current

 

[rog8811]

Here you go..... don't forget to short the capacitor before connecting the LD. what ever the meter reads in mv is the same number of ma....

Regards rog8811

 

[desslok]

is something wrong with that 317? It looks like it's melted in the pic...

 

[jake21]

no wheni had it in the box lil hot glue got on it

 

[jake21]

i dident have a 1 ohm resistor i used a 10 ohm resistor and hooked it up like the pic above and set the meter on 200m and it measured out to be 00.1

 

[Gazoo]

Jake set your meter on the 200ma's scale. This means the switch should be pointing to the 200m on the right hand side of your meter. Then separate the wires I have circled in the picture. Run your meter leads to the wires and that will give you your current.

 

[jake21]

this is what i got now and it reads 00.0 the red wire thats off is the pos wire for the driver