comparing 405nm intensity with other colors

[ideas]

Maybe a noob question in the 405nm field, but I dont have much experience with violet ones (just a one night stand with a 100mW 405nm laserpointer from a friend ;D )

But how does a 5mW 405nm dot compare to other wavelengths?
Idem with beam visibility in smoky room?

Based on my knowledge of the peak potentials triggered by lightwaves in our retina it should be

532nm > 473nm > 405nm >> 655nm for equal mW ratings

But I have no 405nm laserpointers (ordered some in the group buy) for a direct comparison

Thanx!

 

[ElektroFreak]

A 5mW 405nm diode would be quite dim, with no visible beam unless a lot of smoke is around. A 5mW red pointer of any red wavelength (635 up to 680nm) would appear a bit brighter than a 5mW 405nm (with some variation due to the fact that not everyone perceives 405nm light the same way), especially at a distance.

 

[Tech_Junkie]

I dont have much experience with violet ones (just a one night stand with a 100mW 405nm laserpointer

I hope you brought protection.. ;D

 

[ideas]

LOL

I always wear protection.. bought this one.. uranium doped on the tip.. for a nice luminous effect in the dark with 405nm and UV

 

[wolfblue]

Look in "Items of Interest " in Sam's Laser FAQ" under "Relative Visibility of Light at Various Wavelengths"

http://www.repairfaq.org/sam/laserioi.htm#ioicav2


--John

 

[randomlugia]

It's about 405-650-532, each one being 4x as bright as the last.

Example: 20mW BR=5mW red
5mW green=80mW BR

 

[Spyderz20x6]

LOL

I always wear protection.. bought this one.. uranium doped on the tip.. for a nice luminous effect in the dark with 405nm and UV

Are those real?
I'm totally gonna buy some

 

[leukoplast]

I have a red that is at about 70mW right now, and brightness wise it blows my 150mW violet out of the water. My 150mW violet might be the same, or less bright than a 5mW green. Although that changes when you fluoresce on things.

 

[wolfblue]

I have a red that is at about 70mW right now, and brightness wise it blows my 150mW violet out of the water. My 150mW violet might be the same, or less bright than a 5mW green. Although that changes when you fluoresce on things.

Yeah, thats closer to the numbers I assume.

2-3mW 532 green=16-20mW 650 red= 80-90mW 405 violet. But The people that really know are the ones who have tried a white laser, like rog8811 and FireMyLaser.


--John

 

[Xer0]

A 5mW red pointer of any red wavelength (635 up to 680nm) would appear a bit brighter than a 5mW 405nm

yeah, but to carry on: 635nm will be brighter then 650

lol, night glowing condoms... cool thing, but not the healthiest ;D

 

[Raybo]

My old eyes seem to prefer the cooler side of the spectrum.

I just recently bought a pair of high powered pointers from Daquin (a red open can and a BR).
I have no problem seeing the BR's beam, the red beam seams very weak to me.

Ray

 

[daguin]

I cannot even see a violet beam (W/O some sort of visualizer) until the output is above 150mW

Peace,
dave

 

[rocketparrotlet]

My blu-ray beam (about 120mW) looked like about 12mW of green to me. Mine was a little "bluer" than most. Sadly, now my green is dead and my blu-ray is down to about 80mW (I'm guessing), so the beam is quite a bit dimmer. Now I can hardly see it unless it's really dark.

-Mark

 

[daguin]

My blu-ray beam (about 120mW) looked like about 12mW of green to me.  Mine was a little "bluer" than most.  Sadly, now my green is dead and my blu-ray is down to about 80mW (I'm guessing), so the beam is quite a bit dimmer.  Now I can hardly see it unless it's really dark.

-Mark

Why is your violet laser getting "dimmer"? Have you tried replacing the lens?

Peace,
dave

 

[rocketparrotlet]

Yes.

It was a "strong" PHR- the diode is just going weak. It sucks. I've tried replacing both the batteries and the lens, and that's not it. Maybe my connections are bad.

-Mark

 

[daguin]

Yes.

It was a "strong" PHR- the diode is just going weak.  It sucks.  I've tried replacing both the batteries and the lens, and that's not it.  Maybe my connections are bad.

-Mark

Do you have an LPM? It would be VERY odd for the power to degrade to the point that you would "notice" it? Usually, it would fail before loosing that much output.

How long have you had it? What current is it being driven by?

Sorry for all the questions, but your situation is different than "normal."

Peace,
dave