Teleprompter Product

Overview

A teleprompter is a mirror trick that lets on-camera talent read a script directly into the camera lens, appearing to look the viewer in the eye while staying on-message. The Optical Block—a half-silvered pane of glass mounted at a 45° angle in front of the camera—reflects the light from a monitor image downward into the talent's eyes, while the glass is transparent enough to let the camera see through it. The talent sits in front of the camera and sees the script scrolling on the Display Monitor, mounted just above the lens. To a viewer at home, it looks like the talent is staring directly at the camera; in reality, they are reading off a live text crawl just a few centimeters in front of their face.

Professional studio teleprompters have evolved from literal mirrors to precision optical systems. The Beamsplitter Glass Plate is optically coated so it reflects about 50% of the monitor light while letting 50% of the camera light pass through, striking a balance: the text must be bright enough to read under hot studio lights, but not so bright that it washes out the image on the camera side. The Display Monitor sits on an articulated arm and provides scrolling text fed by a Scroll Control Electronics controller. The Remote Control Unit—typically a wireless foot pedal or hand device—lets a prompter operator (a dedicated crew member) watch the talent and advance the text at a natural speaking pace.

How it works

The talent sits at camera height, a few feet in front of the lens. The Camera Lens Mount clamps the entire assembly to the camera support (or matte box rods), positioning the beamsplitter so that the monitor image is reflected downward and aligned with the camera lens optical axis. When the prompter operator presses the Remote Control Unit, the Scroll Control Electronics increments the script display on the monitor, and the next line appears in the talent's peripheral vision as they speak.

The key to reading convincingly is the Tilt Adjustment: if the beamsplitter is angled wrong, the talent looks too high or low relative to the camera. The friction hinge lets the operator tilt the whole optical block by a few degrees so the text lines up exactly with the camera lens, and the Sunshade Hood blocks ambient studio light from washing out the monitor image and destroying contrast.

Professional setups use Brightness Potentiometer to dial in the right monitor brightness for the ambient light, and some teleprompters have a Video Scaler Chip that can take any video input (VGA, HDMI, SDI) and scale it to fit the monitor resolution. The operator reads the script from a laptop or iOS app, feeds it to the teleprompter, and uses the foot pedal to advance in sync with the talent's voice. This is a real-time collaboration: if the talent fumbles a line and has to re-read it, the prompter operator quickly scrolls back; if the talent ad-libs and moves ahead, the operator catches up.

The Optical Block is the magic: it must be coated to the right reflectance ratio, and it must be glass (not plastic) so it doesn't distort or age. The Optical Frame holds it rigid and the Glass Mount Holder keeps it at precisely 45° to both the camera and the monitor image. A misaligned beamsplitter is visible to the camera as a ghost image, and a dull or scratched glass gives the talent a dim script line that is exhausting to read under bright lights.

Newsroom and broadcast use

In a typical broadcast news studio, a row of three to four cameras points at an anchor desk. Each camera has its own teleprompter, and behind each camera sits a prompter operator with a laptop running news automation software (like iNews or Vizrt Mosart). As the director cues the next package or live interview, the prompter operator loads the script and waits for the anchor to start reading. The operator's job is to match the scroll speed to the anchor's cadence—too fast and the anchor races ahead, too slow and they stall waiting for the next line. Many large stations have two prompter operators per camera so one can prepare the next story while the other is actively scrolling.