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  • Proceedings of the International Quantum Electronics Conference and Conference on Lasers and Electro-Optics Pacific Rim 2011
  • (Optica Publishing Group, 2011),
  • paper C727

Aperture Area Metrology Using Confocal Laser Beam Scanning Technique

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Abstract

In precision optical radiometric and photometric measurements, one of the limiting factors is an accurate knowledge of the area of a beam limiting aperture. The world’s most accurate radiometric measurements are currently realized with a relative standard uncertainty of order 10−4. To achieve this level of accuracy it is essential to measure apertures with the same relative standard uncertainty. We present a computer controlled absolute aperture-area measurement system based on a confocal laser beam scanning technique. In this system, a precision aperture is scanned utilizing a tightly focused beam and precision translation stages.

© 2011 AOS

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