Low NA Fiber Optic Plate - Angular Filter Demonstration

Light Source Cone Half Angle (°): 20.0

Fiber Numerical Aperture (NA): 0.22

Detector Readings

Original Light Intensity: 100%

Ideal Transmission Intensity: 0%

Estimated Real Transmission: 0%

Peak Intensity: 0

Angular Acceptance: 0°

Note: The calculated transmission is ideal. In real life, a low NA fiber optic plate typically absorbs 40–60% of the light due to scattering and imperfections.

Additional: (1) The real-life transmission also depends on the thickness of the fiber optic plate (FOP).
(2) The real-life transmission will transmit much more collimated light than diffused light.

How it Works

A Low NA Fiber Optic Plate consists of thousands of optical fibers bundled together. The light source emits rays within its cone half angle (CHA), but each fiber only accepts light within its numerical aperture cone, effectively filtering out high-angle rays. Accepted rays are collimated and exit parallel, demonstrating angular filtering.