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Proceedings Article

Long gauge block interferometer using two frequency-stabilized lasers

[+] Author Affiliations
Mikael Frennberg, M. Johansson, Stefan Kaellberg, U. Karn, Leslie R. Pendrill

Swedish National Testing and Research Institute (Sweden)

Proc. SPIE 3477, Recent Developments in Optical Gauge Block Metrology, 35 (September 30, 1998); doi:10.1117/12.323122
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From Conference Volume 3477

  • Recent Developments in Optical Gauge Block Metrology
  • Jennifer E. Decker; Nicholas Brown
  • San Diego, CA, USA | July 19, 1998

abstract

The design and construction of a laser interferometer using the method of exact fractions for high-accuracy calibration of gauge blocks up to about one meter in length, are described. The interferometer is based on the classical Michelson arrangement. A two-mode stabilized He-Ne laser emitting light at a wavelength of 633 nm is the primary wavelength reference for the interferometric length measurement, since its frequency is calibrated by heterodyne measurement with an iodine-stabilized He-Ne laser at 633 nm which is used to maintain the national meter standard. A second two-mode stabilized He-Ne laser, at a wavelength of 543 nm, is used in order define the absolute length. The estimated standard uncertainty for interferometric length measurements is about 50 nm for a 1 meter gauge block. Results from trial measurements made on various gauge blocks, including a bilateral comparison, are reported.

© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Mikael Frennberg ; M. Johansson ; Stefan Kaellberg ; U. Karn and Leslie R. Pendrill
"Long gauge block interferometer using two frequency-stabilized lasers", Proc. SPIE 3477, Recent Developments in Optical Gauge Block Metrology, 35 (September 30, 1998); doi:10.1117/12.323122; http://dx.doi.org/10.1117/12.323122


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