Graduate Contrast-Calculation between two planes

[QuestionsAsker101]

Hi there, I am new to the Forum!

I have a little bit of a tricky Problem. I am trying to calculate the Contrast between two planes as seen here:

So I started by cutting the Problem in two Parts.
Part 1, The Monitor:

I know the Luminance of the Monitor X, and the reflectivity of the semi-transparent Plane A2 20%.
Therefor I know that I can now get the Luminance of the semi-transparent Plane by Assuming it as a plane with a smaller Surface A2* with the Luminance of 20% of the Monitor, because the distance of the monitor and the plane is very Small.

So this is where the Problems beginn: I don't know how to factor in the distance of the plane to the Eye, so that i can later compare it to the Plane A1.

The second Part of the Problem is the Wall:

The wall is seen from the same angle omega as the semi-transparent plane. The light that passes through the semi-transparent plane gets a factor of 0.34 from the degree of transmission.
I know how to calculate the luminous flux of the Wall, but can't quite get how to transfer the luminous Flux to a unit, that i can compare to the Luminance of the Monitor.

Can anyone here help me?

 

[Andy Resnick]

Hi there, I am new to the Forum!

I have a little bit of a tricky Problem. I am trying to calculate the Contrast between two planes as seen here:

Is your setup like "Pepper's Ghost"?

https://en.wikipedia.org/wiki/Pepper's_ghost

 

[QuestionsAsker101]

Is your setup like "Pepper's Ghost"?

https://en.wikipedia.org/wiki/Pepper's_ghost

Yes... I would like to calculate how bright my Display has to be to be visible in a Room with 1200lux.