473nm vs. 532nm vs. 593nm vs. 635nm vs. 660nm

Milos · Nov 17, 2007

I decided to make this thread as I think many people wander about this.

I'm talking about how much power is need in each of these freqs to achieve equal visibility to human eye.

I'm also asking here what powers of RGB respectively is used to create WHITE LIGHT. How crucial the frequency choices are for RGB white ?

If you own different color lasers, I hope to read your opinions. Please post photos if you can.

**
To start with something specific, how visible is Laserglow VEGA (10mW 593nm)?. What can it be compared to in greens,
and should it be more or less visible than RPL-30mW blue?

Milos · Nov 17, 2007

Re: 473nm vs. 593nm vs. 635nm vs. 660nm

thanks for pics. Pretty cool. Your Aquarius 2mW looks much brighter than 5mW 635nm though! (I take 635nm is one on lower right)
??

I'm unclear about 473nm vs. 635nm.
635nm is about the same apart from 555nm (optimum freq. for human visibility) as 473nm, yet this graph puts 635nm as about 3x brighter.
It basically puts 473nm Blue to be as visible as 650nm reds.

Can someone confirm the accuracy of this old graph. (dates from 1988)

Milos · Nov 18, 2007

Re: 473nm vs. 593nm vs. 635nm vs. 660nm

Yes, that shows better. On first picture green laser affected reds so it wasn't as true of comparison.
Thanks a lot man.

Cyparagon · Nov 18, 2007

Re: 473nm vs. 593nm vs. 635nm vs. 660nm

Those reds are most likely not 5mW though. Most reds will measure from 2-4mW, and all that I own have a value of 3-3.5.

It's quite possible all three are outputting 3mW

Milos · Nov 18, 2007

Re: 473nm vs. 593nm vs. 635nm vs. 660nm

Cyparagon said:
Those reds are most likely not 5mW though. Most reds will measure from 2-4mW, and all that I own have a value of 3-3.5.

It's quite possible all three are outputting 3mW

I was thinking the same thing

Its very true.

By any chance Sawt al Hurriyah, do you have lasercheck ?

philguy · Nov 18, 2007

Re: 473nm vs. 593nm vs. 635nm vs. 660nm

Still, aren't you missing something? Your LCD/CTR will display the dot as a combination of red, green and blue - but not at the wavelength of the dot! And does the camera CCD have a similar wavelength sensitivity curve as the human eye?

So what I mean to say is, the two red dots (650 and 635) are reproduced by one red frequency, and the difference results in "dotting" it with different amounts of blue and green.

Milos · Nov 22, 2007

Re: 473nm vs. 593nm vs. 635nm vs. 660nm

philguy said:
Still, aren't you missing something? Your LCD/CTR will display the dot as a combination of red, green and blue - but not at the wavelength of the dot! And does the camera CCD have a similar wavelength sensitivity curve as the human eye?

So what I mean to say is, the two red dots (650 and 635) are reproduced by one red frequency, and the difference results in "dotting" it with different amounts of blue and green.

good point.
I wander what frequency of Red vs Green vs Blue in nanometers do displays use when creating clean WHITE?

Or.. which RGB white laser would be whiter? One that uses 635nm for red or one that uses 660nm?

philguy · Nov 23, 2007

exactly that's what I have wondered, too before - is there a "conversion algorithm" from RGB Hex values to nm?

Or alternatively, if CRTs/LCDs are all normized to one red/green/blue wavelengt or if my tft will have a different #FF0000 than your CRT.

Milos · Nov 24, 2007

Maybe some video guy on this forum can give us an answer.
Here is another graph showing daylight vs night vision sensitivity to colors.

bridge · Nov 25, 2007

very well topic, wish someone will tell us more.
the rate of R, G,B to got real white with different wavelength, maybe day and night will be differnet

473nm vs. 532nm vs. 593nm vs. 635nm vs. 660nm

Milos

0

Milos

0

Attachments

Milos

0

Cyparagon

0

Milos

0

philguy

0

Milos

0

philguy

0

Milos

0

Attachments

bridge

0

Online statistics

Forum statistics

Share this page