For 90 percent of the movie, we used a beam splitter camera.

Some of the light continued forward through the beam splitter, and the rest was forced into a sharp right turn.

These are used as beam splitters in many optical instruments.

Next, as shown in the bottom diagram, a second beam splitter is introduced at the top right.

Detect these photons after they have been mixed together using a beam splitter.

Note also the precise orientation of the beam splitters.

The prism can therefore be used as a polarizing beam splitter.

A hole mirror or a beam splitter are options to collect a return signal.

A beam splitter separates the light into reference and measurement beams.

Inside the camera, a beam splitter separates the light from the scene into red, green and blue light.

A wide laser or light beam is first shot at the beam splitter.

The Fresnel reflection from the first surface of the mirror acts as a beam splitter.

Instead, the signal is distributed using beam splitters.

The relative minus sign appears because the beam splitter is a unitary transformation.

Squeezing: Squeezed vacuum is injected into the dark port of the beam splitter.

These beams travel to mirrors, reflect, and then recombine at the beam splitter.

This means that when the two beams combine at the beam splitter, they destructively interfere.

The color of the light coming from the beam splitter let the researchers know if they succeeded with the entanglement swapping.

One can either use two distinct lasers or one laser source and a beam splitter.

The apparatus also contains an infrared laser, beam splitters, and many feedback control loops.

The researchers mix the two light beams in a beam splitter, and look for simultaneous detector clicks.

The transmitted beams from two infrared sources are superimposed onto an internal beam splitter.

The other 50% of the overlapped signal passes through the beam splitter and onto the compensation detector.

The photons that go one way never leave Alice's instrument, but simply get sent bounced off a mirror and returned to the beam splitter.

The second variable in the experiment is the time of arrival of the photons at the beam splitter.