The formula to calculate the Exit Pupil (EP) is:
\[ EP = \frac{D}{M} \]
Where:
The exit pupil is a term used in optics to describe the virtual aperture in an optical system. It is the point where the light rays coming from an object converge into the viewer’s eye through the optical system, such as a telescope or binoculars. The size of the exit pupil determines the amount of light that enters the eye, affecting the brightness of the image. It is typically measured in millimeters and can be calculated by dividing the diameter of the objective lens by the magnification of the system.
Let's consider an example:
Using the formula to calculate the Exit Pupil:
\[ EP = \frac{50}{10} = 5 \, \text{mm} \]
This demonstrates that with a diameter of the objective lens of 50 mm and a magnification of 10, the exit pupil would be 5 mm.