Lichtkeils

Lichtkeils, also known as light wedges, are optical components designed to split a beam of light into two separate beams. They are typically made of a transparent material, such as glass or plastic, and are shaped like a wedge. The angle of the wedge determines the separation angle between the two outgoing beams. When a light beam enters a Lichtkeil, it undergoes refraction at both surfaces. The difference in the refractive indices of the material and the surrounding medium, along with the wedge angle, causes the beam to diverge.

Lichtkeils are used in various optical systems where beam splitting is required without significant loss of light intensity. Applications include optical instruments like spectrometers, interferometers, and some types of beam expanders. They can also be found in certain illumination systems or in specialized imaging setups. The primary advantage of a Lichtkeil is its ability to create two distinct beams from a single source, which can then be manipulated independently or used for comparison purposes. The degree of beam separation is precisely controlled by the geometry and material properties of the Lichtkeil.