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Old 07-25-2017, 03:31 AM #545
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Default Re: 505nm and 480nm diode RESULTS

Look at the cyan cartridge from your nearest inkjet printer. It's a sky blue. As far as I see, that's something in the ~480-500nm range. Wikipedia calling 520nm cyan is categorically wrong. Show your 520nm pointer to any random guy on the street, and he'll tell you it's green. Even my 511nm pointer is a pretty obvious green.


According to the CIE color space (briefly mentioned above), if 520nm were cyan, then 520nm plus 650nm would make a purple. That is undeniably false.


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Old 07-25-2017, 03:34 AM #546
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Default Re: 505nm and 480nm diode RESULTS

I can say the same about 502nm ^
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Old 07-25-2017, 04:36 AM #547
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Default Re: 505nm and 480nm diode RESULTS

Good point, my apologies guys

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Old 07-25-2017, 10:05 AM #548
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by badboybilly View Post
Has anyone seen this colour comparison of wavelengths very strange!

wavelength colors
That's a strange one indeed, I've never seen that particular comparison, but it's about useless until you're into the 500nm + range, and then it's probably iffy.
It looks like as they go through the 400nm range, they keep repeating a sequence of 6 or so colors over and over. Definitely bizarre!
I've got to admit, that is a nice looking "green" 440nm that they're showing!
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Old 07-25-2017, 10:15 AM #549
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by BowtieGuy View Post
That's a strange one indeed, I've never seen that particular comparison, but it's about useless until you're into the 500nm + range, and then it's probably iffy.
It looks like as they go through the 400nm range, they keep repeating a sequence of 6 or so colors over and over. Definitely bizarre!
I've got to admit, that is a nice looking "green" 440nm that they're showing!
Yeah, at first I didn't know if this was a parody of what wavelengths were supposed to look like or if they simply did a huge screw-up and never noticed? Either way, this is what I use for my signature. The color it shows for the wavelengths is almost on point with what I see, so it's uber reliable. (at least for my eyes)

Edit: I've noticed some people put their 515 pointers as much "bluer" then what it really looks like. I just turned mine on awhile ago, and it's absolutely, positively green. According to the tool, 515 actually DOSEN'T have any blue in it, just some leftover red rgb(31,255, 0)so it's as pure green as you're gonna get, unless you have a 510 diode like Lifetime17, that's PURE GREEN. 515 is certainly less yellowish-green then 532 but by itself it looks pretty much like how I have it listed in my sig.

https://academo.org/demos/wavelength...-relationship/

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Old 07-25-2017, 05:46 PM #550
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Default Re: 505nm and 480nm diode RESULTS

It's interesting how people here are defending what they see as colors when comparing wavelengths of light. It is always going to vary from individual to individual. I like to have two lasers going to compare wavelengths as colors because, to me, it is only in the comparison that one can see the differences. Just my 2 cents.
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Old 07-25-2017, 08:26 PM #551
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by paul1598419 View Post
It's interesting how people here are defending what they see as colors when comparing wavelengths of light. It is always going to vary from individual to individual. I like to have two lasers going to compare wavelengths as colors because, to me, it is only in the comparison that one can see the differences. Just my 2 cents.
Everyone's eyes are different, yep

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Old 07-25-2017, 08:54 PM #552
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Default Re: 505nm and 480nm diode RESULTS

Quote:
Originally Posted by paul1598419 View Post
It is always going to vary from individual to individual.
Show me someone that sees 520nm as sky blue/cyan, and I'll show you someone that has a diagnosable color vision disorder.
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Old 07-25-2017, 09:23 PM #553
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Default Re: 505nm and 480nm diode RESULTS

I never tried to make the point that 520nm would look sky blue, or any color blue to anyone. It looks green to me and most everyone else who isn't red/green color blind.
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Old 07-26-2017, 05:34 PM #554
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Default Re: 505nm and 480nm diode RESULTS

Real quick can someone confirm the pinout of the 505nm diode before I pop this?
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Old 07-26-2017, 05:38 PM #555
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Default Re: 505nm and 480nm diode RESULTS

Should be the same as op post.. case nautral
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Old 07-26-2017, 05:39 PM #556
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Default Re: 505nm and 480nm diode RESULTS

Thanks, didn't see it specified "both diodes"
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Old 07-26-2017, 05:47 PM #557
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Default Re: 505nm and 480nm diode RESULTS

Which diode do you have? What number is printed on the can?
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Old 07-26-2017, 05:48 PM #558
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Default Re: 505nm and 480nm diode RESULTS

Sb147ec9
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Old 07-26-2017, 06:19 PM #559
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Default Re: 505nm and 480nm diode RESULTS

The SB1573N91 diodes are case positive. NOT case neutral. Do not get them confused.

The SB1473N91 are case neutral. There is another version of this diode....SB147EC91 and it is also case neutral.
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Old 07-26-2017, 06:22 PM #560
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Default Re: 505nm and 480nm diode RESULTS

Paul,

So they do NOT follow the diagram at the beginning of this thread?
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