Optical Beam Expander

A keplerian telescope consists of two focusing lenses where the distance between the two lenses is the sum of their focal lengths.

Optical beam expander.

A beam expander can enlarge an input beam by the factor m but it can also reduce it by the factor 1 m with a reversed optical beam path. For more than 75 years edmund optics eo has been a leading producer of optics imaging and photonics technology. Laser beam expanders increase the diameter of a collimated input beam to a larger collimated output beam for applications such as laser scanning interferometry and remote sensing. How to build a beam expander beam expansion or reduction is a common application requirement in most labs using lasers or light sources and optics.

They take a beam of light and expand its size. Usually beam expanders are used to increase the diameter of laser beams. Thorlabs galilean type beam expanders which are available in both fixed and variable magnification options are offered for use in the uv visible near infrared and mid infrared spectral ranges. Thorlabs variable magnification galilean beam expanders are available with either a 2x 5x or a 5x 10x continuously variable beam expansion ratio.

Contemporary laser beam expanders are afocal systems developed from well established optical telescope fundamentals. Our fixed magnification rotating lens optical beam expander. In most cases a beam expander is realized as an optical telescope consisting of two lenses in rare cases of two curved mirrors. Beam expander from shanghai optics.

They are also used to reduce the beam diameter which may be useful when using acousto or electro optic modulators. An optical beam expander also known as a collimator or up collimator is a two or more element optical system that changes the divergence characteristics and the size of the beam. The fixed magnification sliding lens beam expanders are offered with optics that have either narrowband or wideband ar coatings. Beam expanders are optical systems for increasing or decreasing the diameter of a laser beam.

A beam expander will have a design input diameter as well typically a diameter smaller than the maximum input diameter where the optical performance of the beam expander is optimized. Used with collimated light they have important applications in remote sensing interferometry and laser scanning. Two different configurations are common. Beam expanders are optical devices which increases the diameter of the input beam to produce a larger output.