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.
Used to limit the wavelength ranges in laser cavities.
To collimate the beam of laser diodes.
