Quote:
Originally Posted by
UltraBlack
Quote:
Originally Posted by
darinp2
Do you disagree that the units for luminous intensity are lumens per steradian angle?
No, I don't disagree.
So, how did the lumens per steradian not go down when blocking 90% of the tiny subpixels that a human can't see any size for?
Quote:
Originally Posted by
darinp2
And since the eye (brain perception) deals only with luminous flux,
Not sure where that can from. Take a candle and put it a ways away. Now focus the beam down to a small angle (like a flashlight). The luminous flux will stay the same (assuming 100% efficiency for the moment), while the luminous intensity for the direction it is pointed will go up. Is it your position that a human wouldn't see a difference because it was only luminous intensity that changed? If not, why would a human notice a difference with a flashlight pointed at them from a far distance between the flashlight focused as normal and taking the focusing lens off so the light source is in the open like a candle?
Maybe we are using different definitions of luminous intensity. Do you disagree with this definition from Wikipedia?
"In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye."
If it is easier we could consider radiant flux and radiant intensity since they have a similar relationship as luminous flux and luminous intensity, but don't require scaling for the eye's perception.
Here is Wikipedia's definition for radiant intensity.
"In radiometry, radiant intensity is the radiant flux emitted, reflected, transmitted or received, per unit solid angle"
Do you disagree that the radiant intensity goes down when shutters cut off 90% of each subpixel?
--Darin