Home > Terms > English, UK (UE) > Beam Expander
Beam Expander
An optical device that increases beam diameter while decreasing beam divergence (spread). In its simplest form consists of two lenses, the first to diverge the beam and the second to re-collimate it. Also called an upcollimator.
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- Part of Speech: noun
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- Industry/Domain: Industrial machinery
- Category: Laser equipment
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