Instantaneous Phase Measuring Interferometry

Smythe, R.; Moore, R.

doi:10.1117/12.7973301

Cited by 184 publications

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“…In addition, in the laboratory circumstance, the measurement precision of laser polarization interferometry is higher than that of laser heterodyne interferometry, and therefore the former has a wide prospect for applications in the high precision measurement. Investigations on the main error sources as well as their mechanisms in the laser polarization interferometer, which help to reduce the measurement nonlinearity and hence improve the measurement precision, are of high necessity.The simultaneous phase-shifting interferometer (SPSI) uses a four-channel simultaneous phase-shifting technique to avoid the direct current (DC) drift influence, which further widens its application range [4,5] . The nonlinear error caused by the imperfect properties of optical elements in SPSI is the key factor that restricts the improvement of measurement precision.…”

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confidence: 99%

“…The simultaneous phase-shifting interferometer (SPSI) uses a four-channel simultaneous phase-shifting technique to avoid the direct current (DC) drift influence, which further widens its application range [4,5] . The nonlinear error caused by the imperfect properties of optical elements in SPSI is the key factor that restricts the improvement of measurement precision.…”

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confidence: 99%

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Effect of asymmetrical transfer coefficients of a non-polarizing beam splitter on the nonlinear error of the polarization interferometer

Zhao

Tan

Liu

2010

Optoelectron. Lett.

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The mechanism of a non-polarizing beam splitter (NPBS) with asymmetrical transfer coefficients causing the rotation of polarization direction is explained in principle, and the measurement nonlinear error caused by NPBS is analyzed based on Jones matrix theory. Theoretical calculations show that the nonlinear error changes periodically, and the error period and peak values increase with the deviation between transmissivities of p-polarization and s-polarization states. When the transmissivity of p-polarization is 53% and that of s-polarization is 48%, the maximum error reaches 2.7 nm. The imperfection of NPBS is one of the main error sources in simultaneous phase-shifting polarization interferometer, and its influence can not be neglected in the nanoscale ultra-precision measurement.The polarization interferometry is superior to heterodyne interferometry in the nonlinear performance [1][2][3] . In addition, in the laboratory circumstance, the measurement precision of laser polarization interferometry is higher than that of laser heterodyne interferometry, and therefore the former has a wide prospect for applications in the high precision measurement. Investigations on the main error sources as well as their mechanisms in the laser polarization interferometer, which help to reduce the measurement nonlinearity and hence improve the measurement precision, are of high necessity.The simultaneous phase-shifting interferometer (SPSI) uses a four-channel simultaneous phase-shifting technique to avoid the direct current (DC) drift influence, which further widens its application range [4,5] . The nonlinear error caused by the imperfect properties of optical elements in SPSI is the key factor that restricts the improvement of measurement precision. In-depth discussions have been carried out by previous researches [6] , but the measurement nonlinearity caused by asymmetrical transfer coefficients of NPBS has not yet been discussed.In this paper, the mechanism of a NPBS with asymmetrical transfer coefficients causing the rotation of polarization direction is analyzed and calculated, and its influence on the nonlinear error of SPSI is also discussed.

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confidence: 99%

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Effect of asymmetrical transfer coefficients of a non-polarizing beam splitter on the nonlinear error of the polarization interferometer

Zhao

Tan

Liu

2010

Optoelectron. Lett.

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“…4,5 Dynamic interferometry techniques enable taking all necessary interferometric data simultaneously to determine phase in a single snapshot. [6][7][8] These instruments have been designed with the purpose of measuring phase data in the presence of vibration and air turbulence. 9,10 Interferograms can be captured in "real" time.…”

Section: Dynamic Interferometermentioning

confidence: 99%

Dynamic visible interferometric measurement of thermal fields around living biological objects

Creath

Schwartz

2004

SPIE Proceedings

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Dynamic interferometry is a highly sensitive means of obtaining phase information that can determine phase at rates of a few measurements per second. The sensitivity of these phase-measurement instruments is on the order of thousandths of a wavelength at visible wavelengths enabling the measurement of small temperature changes and thermal fields surrounding living biological objects. Temperature differences are clearly noticeable using a visible wavelength source because of subtle changes in the refractive index of air due to thermal variations between an object and the ambient room temperature. Living objects can also easily be measured over a period of time to monitor changes as a function of time. This technique has many promising applications in biological and medical sciences for studying thermal fields around living objects. In this paper we compare differences in thermal fields measured with dynamic phase-measuring interferometry surrounding room temperature and body temperature inanimate objects as well as living biological objects at data rates of many measurements per second.

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“…In order to implement this system under such conditions the optics would have to be redesigned to generate all four phase steps at once. This can be done with a system utilizing four separate TV cameras [6].…”

Section: Conclusion and Future Plansmentioning

confidence: 99%

The Development of an Electronic Holography System

Stetson

1990

Review of Progress in Quantitative Nondestructive Evaluation

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Instantaneous Phase Measuring Interferometry

Cited by 184 publications

References 0 publications

Effect of asymmetrical transfer coefficients of a non-polarizing beam splitter on the nonlinear error of the polarization interferometer

Effect of asymmetrical transfer coefficients of a non-polarizing beam splitter on the nonlinear error of the polarization interferometer

Dynamic visible interferometric measurement of thermal fields around living biological objects

The Development of an Electronic Holography System

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