Long gauge block interferometer using two frequency-stabilized lasers

Mikael Frennberg; M. Johansson; Stefan Kaellberg; U. Karn; Leslie R. Pendrill

doi:10.1117/12.323122

30 September 1998 Long gauge block interferometer using two frequency-stabilized lasers

Mikael Frennberg, M. Johansson, Stefan Kaellberg, U. Karn, Leslie R. Pendrill

Proceedings Volume 3477, Recent Developments in Optical Gauge Block Metrology; (1998) https://doi.org/10.1117/12.323122
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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.

Citation Download 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, (30 September 1998); https://doi.org/10.1117/12.323122

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