Is there an experimental way to determine the distance of the sensor plane to the exit pupil? (acuracy a few milimeters with distances between 10-70 mm)
Why I want this In my lab I am working with a highly angle sensitive sensor, I need the distance of the exit pupil so that I can calculate chief ray angles for different positions on the sensor.
What I have Tried
Using a thin lens assumption and assuming that a collimated beam of light. The angle at which the angle enters the lens (measured from optical axis) is related to the exit pupil and the position of the light spot on the sensor
exit pupil = (distance of spot from center)/tan(incident angle)
Is my approximation valid to determine the position of the exit pupil
If not, what is a simple way to get a good approximation of the distance.