What do you call the violet 405nm laser in general

Re: What do you call the violet 405nm laser in gen

I mainly say blu-ray, and then tries to explain it's actually a HD-DVD laser

Blu-ray is just so much easier to say than HD-DVD

Re: What do you call the violet 405nm laser in gen

Switch said:

[quote author=LRMNmeyer link=1220660046/20#28 date=1220821431]I usually say violet laser, or to more educated people, blu-ray.

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And to even more educated people HDDVD? [/quote]

and even MORE educated people call it 405 nanometer.

I personally call all kinds of stuff depending on the education level of the person im talking to. It also depends on the point im trying to convey.

Examples:

If im talking about its florescence, i call it a blacklight laser.

If im talking to a Ravens fan (i live in baltimore) i call it a purple laser

if im talking to a girl i call it a... ok i dont talk to girls much...

if im talking to a educated forum member i call it a 405nm (wich i pronounce 'four-o-five nanometer')

If im talking about puting it in a scanner i call it a violet laser (as in RGV)


I will say this, people in the scanner forums refer to it as violet, which is a big deal because if that becomes a laser industry standard then this discussion is moot.
RGV == Red Green Violet, the buck stops there as far as im concerned.  

Re: What do you call the violet 405nm laser in gen

I think of it as a "four-oh-five". I generally call it a violet or purple in person, I generally use them interechangably. On the forum, I'll call it a violet or 405.

Re: What do you call the violet 405nm laser in gen

Switch said:

But still plenty people call it PHR or 803t laser. :-/

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p8ntballer589 said:

I call it my blacklight Laser. Because more people are familier with how a blacklight looks so they relate to that.


I havent voted yet.

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"other" added.

Re: What do you call the violet 405nm laser in gen

i simply call it blu-ray

Re: What do you call the violet 405nm laser in gen

Its not really violet as such, but a high UV. How does High-UV-Ray sound to you?

I just call it a 405nm laser.

Re: What do you call the violet 405nm laser in gen

Things said:

Its not really violet as such, but a high UV. How does High-UV-Ray sound to you?  

I just call it a 405nm laser.

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I thought that only <400nm was considered UV. :-/

Re: What do you call the violet 405nm laser in gen

Blu-v-  

Re: What do you call the violet 405nm laser in gen

405 is not actually"blacklight" or "woods lamp" because its 405 nm

Ultraviolet A, long wave, or black light UVA 400 nm – 315 nm

it IS violet. it is EXACTLY violet. it comes JUST BEFORE ULTRAVIOLET so it IS violet

Re: What do you call the violet 405nm laser in gen

Well, it's not exactly violet or UV. It's borderline either of them. Like 594nm and yellow/orange.

Re: What do you call the violet 405nm laser in gen

405nm would still be classified as long wave UV at the least, violet wouldnt cause stuff to flouresce as easily as any kind of UV.

Who actually said blu-ray was specifically 405nm? It varies from diode to diode, temperature and everything.

Re: What do you call the violet 405nm laser in gen

It's true. JayRob said he had some diodes which were 'bluer' than the rest - maybe 10nm difference.

6 posts to go...

Re: What do you call the violet 405nm laser in gen

VillageIdiot said:

It's true. JayRob said he had some diodes which were 'bluer' than the rest - maybe 10nm difference.

6 posts to go...

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Ultra violet really just means "beyond" violet.  As such it becomes "ultra" violet when it can no longer be seen by the human eye.  The "line" where that takes place is variable.  There is no "hard" agreement on exactly what wavelength is the first "ultra" wavelength.  If it can still be perceived by the human eye it is NOT ultra violet.  405nm is "near" ultra violet.

Some things fluoresce when excited by wavelengths well below 405nm.  Our "green" lasers can make some things fluoresce.  There are several reports in this very forum about this phenomenon.

All diodes vary with manufacturing, heat, power, etc. differences.  The best estimate is that "bu-ray" type diodes produce light at 405nm +-10nm.  So it is accepted that any particular diode could produce anywhere from 395nm-415nm.  There are probably individual diodes that fall outside that range as well.  405nm is the average expected wavelength. from these diodes.  

Yes, some diodes produce light at longer wavelengths.  They are "bluer."  Another cool phenomenon associated with this variability is that since 405nm is so close to the eye's ability to perceive it, the longer the wavelength, the easier it is to see.  That means that it "looks" brighter.  I have a laser that is only putting out 70mW that "looks" brighter than my 170mW lasers!  The spot from the 70mW laser is slightly "bluer" to the eye, but the real difference is only seen when the two lasers are shone next to each other.  The 70mW laser's beam is MUCH easier to see.  It is easily described as "brighter" even though it is less than half as "bright" by measurement.

Peace,
dave

Re: What do you call the violet 405nm laser in gen

I typically call it BluRay, but other times I call it purple/violet. Normally I call it both since when I tell my friend it's a bluray laser, he says it looks purple. ;D