New Approach in Interferometric Length Measurements
نویسندگان
چکیده
Interferometric length measurements without parallax error, based on the phenomenon of the reproducible wringing, are demonstrated. Using reproducible wringing together with the slave-block technique, accuracy level below 1 nm can be obtained for blocks of a few mm length with small flatness deviation. Phase change correction determination with sub-nm uncertainty is achieved for blocks up to 100 mm. Comparing the results of the double-ended method on a transparent reference plate with the reproducible wringing results, measurements without parallax error can be performed in the general case with a nm uncertainty.
منابع مشابه
All-Fiber Interferometer for Chromatic Dispersion Measurements
Abstrucf-A new all-fiber interferometric method for chromatic dispersion measurements in meter-length single-mode fibers is presented. In a Michelson setup a reference fiber is used whose physical length is varied so as to obtain an adjustable optical delay. Time resolution, ease of manipulation, and mechanical isolation are considerably improved with respect to conventional interferometers. Re...
متن کاملN-slit interferometer for secure free-space optical communications: 527 m intra interferometric path length
The N-slit interferometer is demonstrated to function with an intra interferometric propagation path length of 527.33 m. Interferograms representing several interferometric characters, corresponding to N = 2, 3, 4, and 5, were recorded at the interferometric plane located at the end of an open air propagation range. Interferometric computations, based on the application of Dirac’s notation, wer...
متن کاملMultifrequency Interferometric Imaging with Intensity-Only Measurements | SIAM Journal on Imaging Sciences | Vol. 10, No. 3 | Society for Industrial and Applied Mathematics
We propose an illumination strategy for interferometric imaging that allows for robust depth recovery from intensity-only measurements. For an array with colocated sources and receivers, we show that all the possible interferometric data for multiple sources, receivers, and frequencies can be recovered from intensity-only measurements provided that we have sufficient source location and frequen...
متن کاملMultifrequency Interferometric Imaging with Intensity-Only Measurements
We propose an illumination strategy for interferometric imaging that allows for robust depth recovery from intensity-only measurements. For an array with colocated sources and receivers, we show that all the possible interferometric data for multiple sources, receivers and frequencies can be recovered from intensity-only measurements provided that we have sufficient source location and frequenc...
متن کاملSimultaneous Water Vapor and Dry Air Optical Path Length Measurements and Compensation with the Large Binocular Telescope Interferometer
The Large Binocular Telescope Interferometer uses a near-infrared camera to measure the optical path length variations between the two AO-corrected apertures and provide high-angular resolution observations for all its science channels (1.5-13 μm). There is however a wavelength dependent component to the atmospheric turbulence, which can introduce optical path length errors when observing at a ...
متن کامل