lab laser to handheld possible?

dead · Dec 19, 2009

Hello,
is it possible to transform a lab laser(50 or 80mw 473nm o-like) into a handheld laser?
Thanks
Greets dead

HIMNL9 · Dec 19, 2009

It depend ..... if is an AC powered one, is difficult, except if you find some miles of extension cable

..... if is a 5V unit, is possible, but you still end with a "box-type" unit, difficult to fit it in a barrel/tube host .....

DashApple · Dec 19, 2009

Hi

As HIMNL9 said if its ac it will be hard , the o like modules are AC in and have a SMPS and diode driver in the psu unit , it would be very hard to make smaller .

Cyparagon · Dec 19, 2009

It's possible but quite a bit of work and you'll be left with a rather large unit.

photonaholic · Dec 19, 2009

Why can't one disconnect the power supply and use a DC supply to power the head?

Then you could still achieve a somewhat reasonable size field laser?

HIMNL9 · Dec 19, 2009

Cause in the lab units, usually, the PSU integrates also the driver ..... in the diode holder / heatsink, there's no drivers.

But can be built an alternative driver, this yes .....

DashApple · Dec 19, 2009

you could make a new smaller driver but then the tecs and that would need to be powerd the head istself couldnt be made smaller as it desinged to be made/run like that , a small high current driver would be ok for the pump diode depending on the power of the diode like in the 2 watt portible ir made by someone on this forum , but cooling would be another problem

Tech_Junkie · Dec 19, 2009

That probably Dark (Tyler) trying to figure out how to make a hand held blue LMFAO. He promised someone one LOL.

mfo · Dec 19, 2009

Yeah but Tyler don't make good on his promises. He just takes your money then tells you his mom died. This way you'll feel sorry for him, be patient with him and by the time you snap and ultimately want your $ back it'll be too late to file a paypal claim.

lasersbee · Dec 19, 2009

Or he's trying to prove us wrong about his "expert abilities"...

Jerry

Arayan · Dec 19, 2009

dead said:
Hello,
is it possible to transform a lab laser(50 or 80mw 473nm o-like) into a handheld laser?
Thanks
Greets dead

also depends on the power input, otherwise you could try with an inverter and a "big" battery

photonaholic · Dec 20, 2009

Arayan said:
also depends on the power input, otherwise you could try with an inverter and a "big" battery

I tried running this very laser from an Inverter, no luck!

What I am saying is why not just build a battery powered supply and connect it where I marked the wire.

Leave the old supply in a drawer back home.

HIMNL9 · Dec 20, 2009

Cause you need to build a battery powered DRIVER, not power supply .....

I mean, the wires that go from the board to the diode module, are directly connected to the diode, wihout any kind of current stabilizer, in these lab units ..... the driver and current regulator is part of the circuit on the pcb.

BTW, that one looks similar to an AC power supply

You can use the bare module and take away the pcb in your pics, but you need to build a constant current driver, set for the current of your diode (usually a c-mount, in these units), so you need to know also what current you need for it, ofcourse.

Then yes, you can do it, in this way.

photonaholic · Dec 20, 2009

HIMNL9 said:
Cause you need to build a battery powered DRIVER, not power supply .....

semantics...... To the diode the power supply IS the driver (I know, technically the battery is the power supply and the driver goes between that and the diode.)

I mean, the wires that go from the board to the diode module, are directly connected to the diode, wihout any kind of current stabilizer, in these lab units ..... the driver and current regulator is part of the circuit on the pcb.

I know that

BTW, that one looks similar to an AC power supply

Because it is - it also will not work on an inverter

You can use the bare module and take away the pcb in your pics, but you need to build a constant current driver, set for the current of your diode (usually a c-mount, in these units), so you need to know also what current you need for it, of course.

Then yes, you can do it, in this way.

I am aware of that too, I would hook a driver to the power leads from the laser head and a battery, then all I would have is a big bulky pointer.... BUT with an awesome duty cycle!

HIMNL9 · Dec 20, 2009

What type of inverter have you tried ? ..... some have sinusoidal output at the right frequency, and must work ..... some other (cheap ones) have square outputs or "pseudo sinusoidal" ones, with spikes and high frequency ..... these last cheap ones worth only for resistive loads, and your power supply is NOT a resistive load, so you can risk from just not working correctly to burn it

My ex-boss blowed a high cost multimeter, with a similar mistake, trying to measure 300V out from a PWM 1HP brushless motor driver with the multimeter on 500V AC scale ..... the internal scale of the multimeters are usually planned for 50 or 100 Hz at maximum, and the driver was 50 KHz ..... the multimeter made a funny "vreeeeee" noise for a second, then blowed up (and i let you imagine the face of him, and the laughs around LOL

)

photonaholic · Dec 20, 2009

Yes it was a very "cheap" inverter, and it is the kind with choppy square wave output. (any inverter under $100 is square wave)

It powers CFL lamps, (My main reason for getting it, we own 100 acres and spend a lot of time in the woods during the summer, so I charge up a big 12 volt battery and use it to run lights in the woods during the summer.)

I unplugged the laser as soon as it did not fire.....

LOL at the multimeter accident, hope it was not an expensive one.

lab laser to handheld possible?

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