Because the glass is transparent from the back, the camera captures the presenter without seeing the reflected text. Operational Roles and Technology
Modern Autocue systems use a beam-splitter glass—a sheet of glass that is reflective on one side and transparent on the other—set at a 45-degree angle in front of a camera lens. autocue
To avoid looking like they are "reading," professionals use several techniques: How to present Because the glass is transparent from the back,