Absolute Distance Interferometry

Gillard, C. W.; Buholz, N. E.; Ridder, D. W.

doi:10.1117/12.7972676

Cited by 20 publications

(5 citation statements)

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“…Our simultaneous fit replaces the cumbersome method of selecting successively shorter synthetic wavelengths to get a better estimate of the length [8,9]. The "best length" is that for which is the smallest, shown at the centre in Figure 1.…”

Section: Length Computation Algorithmmentioning

confidence: 99%

“…As with interferometry using visible light, the largest correction to the optical length is undoubtedly caused by the refractive index of the medium between the cavity mirrors. The reported refractive index of air at 10,6 m wavelength and at a standard atmosphere varies from 1,000 2656 to 1,000 2726 [6,8,17]. A much better value is obviously required if the accuracy achieved with the optical length measurement is to be transferred to a mechanical length.…”

Section: Conversion Of Optical Length To Mechanical Lengthmentioning

confidence: 99%

“…Tilford [7] developed an algorithm for fractional fringe measurements with selected pairs of CO 2 laser lines to make an accurate distance measurement. Several CO 2 laser interferometers based on this idea were subsequently described [8,9]. In these interferometers the laser frequency was locked to the peak of the power profile and sometimes fast switching between adjacent CO 2 laser lines was used to measure the fringe fraction.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A multiple frequency heterodyne technique for the measurement of long gauges

Siemsen¹,

Siemsen²,

Decker³

et al. 1996

Metrologia

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Section: Length Computation Algorithmmentioning

confidence: 99%

Section: Conversion Of Optical Length To Mechanical Lengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A multiple frequency heterodyne technique for the measurement of long gauges

Siemsen¹,

Siemsen²,

Decker³

et al. 1996

Metrologia

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show abstract

“…The variable-wavelength interferometry, which has been developed by many researchers, is one of the most successful approaches [1][2][3][4][5][6][7][8][9][10][11][12]. Pluta applied three different developed methods to determine the initial and current interference orders in the images of fringe field, uniform fringe field and optical Fourier transform of the highly birefringent under study [4,6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Weakly Oriented Polymeric Objects by Extended Fringe Field Interference Method

Sadik

Litwin

2009

International Journal of Polymeric Materials

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An extended interferometric method is suggested to increase the measuring accuracy of the spectral dispersion curves of weakly oriented polymeric objects. This extended method is based on the variable-wavelength interferometry fringe field interference (VAWIFFI). Using this method, the calculation of the initial interference order is more accurate, and it can be determined over a small range of the visible spectrum. The advantage of the extended VAWIFFI method is that it is not necessary to take a certain reference like the zero order fringe and/or the initial coincident configuration. In comparison to the single-and multi-fringe VAWIOFT and Pluta methods, the measurement accuracy of the extended VAWIFFI method is discussed.

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“…Absolute distance measurements over 0-10 m have been demonstrated using a CO2 laser [3,4]. However, because of a long wavelength (10 pm), it is not suitable to measure a length shorter than 1 m with an accuracy to the degree of nanometers.…”

Section: Introductionmentioning

confidence: 99%

Process in absolute distance measurement using a dye laser

et al. 1995

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We have developed a system to measure absolute distance. By stabilizing the output direction of dye laser, improving the accuracy of the wavelength and reducing the non-linear errors caused by stray beams, an accuracy of fl.3 nm and a resolution of 0.2 nm were obtained for a range of 100 mm. setting synthetic wavelengths in a geometric ratio to minimize the number of output wavelengths within a range to be measured, became possible and greatly extended the range. Our proposal seems to be an original one.In our system, as wavelengths could be set free, a systematic procedure, i.e.,

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Absolute Distance Interferometry

Cited by 20 publications

References 0 publications

A multiple frequency heterodyne technique for the measurement of long gauges

A multiple frequency heterodyne technique for the measurement of long gauges

Investigation of Weakly Oriented Polymeric Objects by Extended Fringe Field Interference Method

Process in absolute distance measurement using a dye laser

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