What is a beam expander?

Light or laser beam expander is a scientific tool that allows parallel light or laser beams to spread to become a larger output beam. The tool is used in a way similar to the use of binoculars and produces a straight line of telescopic beams or prismatic rays, such as rays that can be seen how light is reflected outside the crystal aspects. Beam expanders are used in laser physics and almost dozen scientific applications that use their output rays for measurement, such as laser micromachining, slicing solar cells, long -distance shooting and other scientific experimentation in several fields. Their beam enlargement without affecting chromatics and intentionally avoiding focus, allowing the smallest applications, as in microscopes, to the greatest measurement of astronomy. Developed from the established optics of the telescope have high transmission and low distortion. Expanders can handle the light from the ultraviolet spectrumthrough all visible areas and into infrared areas and can reduce the amount of length necessary in the telescope. They are designed for configurations of variable and fixed outputs with controls of the column settings.

For a small background, optical telescopes are either refractory or reflecting. Refractive telescopes are licking light using lenses that bend or lick light, while reflecting binoculars use large optical mirrors to reflect light. The beam expander is basically a telescope with the principle that the ratios of the divergence of the beam and the expansion of the beam have the same factor. The lower beam expanders are built on the design of Galileo telescope with a negative input and a positive lens set. However, there are Kepler's telescope desik are GNS that have a middle hole, focusing lens and two positive lenses that are very long, telescopic expandery beam.

designs for laser beam expanders create the location of image and lenses lenses that are the opposite of their location in Kepler's telescope. The input beam of the column is focused on the location between the lenses, where the laser heat accumulates and warms the air, leading to the distortion of the wave, so the Galilean design is often preferred to prevent distortion. Since the laser beam of the expander will increase the laser input using the set expansion power, it will reduce the divergence of the beam at the same power and at a long distance the beam of the column will be smaller.

What is called a hybrid optical design of extra-cakes in rays expanders follow the standard ray of beam with a convex lens, shaped as a curvature of the human eye that creates a multiple prismatic effect. These widespread rays can be up to very long distances, yet it seems very thin when viewed from an angle. These line lighting are used in interferometric processes to performMeasurement in optical and engineering metrology and is also used in nuclear physics, particles and plasma.