Etalons, beam splitter cubes, Faraday isolators, retroreflectors, collimators, and lenses with volume Bragg gratings belong to the group of special optics. These optical components are used in special laser applications.
Beam splitters are used to split a beam into two parts; they can be of differing intensities if necessary.
Parallel incident light that hits the hollow retroreflector will be returned with great accuracy to the light source. Hollow retroreflectors are also known as cat’s eyes.
To stabilize the wavelengths of high power laser diodes, laser diode arrays, and in measurement devices.