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  Glossary Of Laser Engraving and Cut Terms [1]
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Limiting Aperture  A limiting aperture is an optical component or device used to restrict or control the size of a light beam or optical path by blocking or reducing the passage of light rays beyond a certain diameter or area. Limiting apertures are commonly used in optical systems, cameras, telescopes, microscopes, lasers, and photonic devices to control the amount of light entering or exiting the system, improve image quality, reduce aberrations, and enhance contrast and resolution.

Limiting apertures can take various forms, including physical apertures, diaphragms, stops, irises, and filters, and may be adjustable or fixed depending on the application requirements. By precisely regulating the size and shape of the light beam, limiting apertures help optimize optical performance and achieve desired imaging or measurement outcomes.

 
 
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