Thickness and Refractive Index Measurement of a Lamina with a Michelson Interferometer*

Jeppesen, Myron A.; Taylor, A. M.

doi:10.1364/josa.56.000451

Cited by 9 publications

(4 citation statements)

References 1 publication

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“…Different types of mica exhibit different refractive indexes and dispersion depending on the place of origin. For the muscovite mica generally used in the SFB technique the difference in the dispersion profiles and the variation in the refractive index at λ = 5471 Å do not exceed 10%. ,, …”

Section: Referencesmentioning

confidence: 96%

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Thin Films of Liquid Crystals Confined between Crystalline Surfaces

and

Kumacheva

2000

J. Phys. Chem. B

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This paper reports on a study of thermotropic liquid crystals (LC's) confined between two crystalline surfaces studied using the surface force balance technique. A quantitative approach based on measurements of the wavelength splitting (WS) of fringes of equal chromatic order was proposed, which allows the study of orientational transitions in LC films. Reasonable agreement was found between predicted and experimentally measured WS in moderately thick LC films. Optical properties of the LC's were studied experimentally for different orientations of the confining surfaces as a function of the film thickness, humidity, and duration of the experiment. It was shown that upon progressive confinement the medium-range forces in the layer noticeably increase when the twisting angle between confining surfaces increases. It was demonstrated that increase in humidity diminishes anchoring of the LC's to the surface.

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Section: Referencesmentioning

confidence: 96%

“…The wavelength dependence of the refractive indexes of mica can be found from a Sellmeier equation 20 by measuring n o,m and n e,m at selected wavelengths and fitting experimental data to eq 3 to find parameters A and B . In this work, we used A = 1.5154, B = 9255 for n o,m ; and A = 1.5044, B = 8478 for n e,m . , …”

Section: Introductionmentioning

confidence: 99%

Thin Films of Liquid Crystals Confined between Crystalline Surfaces

and

Kumacheva

2000

J. Phys. Chem. B

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“…Two-arm interferometers (e.g., Michelson and Mach-Zehnder interferometers) [1,2] belong to the non-common-path category, where the reference and object beams travel through different paths. Therefore, this category of interferometers suffers from the noise caused by environmental perturbations.…”

Section: Introductionmentioning

confidence: 99%

Polarization phase-shifting Newton interferometer without errors caused by polarization crosstalk

Trịnh¹,

Lin²,

Chen³

et al. 2014

Sensors and Actuators A: Physical

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“…The object is illuminated by a broadband light source, and the frequency-or wavenumber-dependent response of the object on the remitted light is detected with a photodetector-array spectrometer or by tuning the wavelength. 7 Spectrometric techniques have already been used to measure the anomalous dispersion of gases and metal vapors, 8,9 the thickness and refractive index of laminae, 10,11 the film thickness of semiconductor layers, 12 the absolute displacements, 13 and recently the group delay on laser mirrors. 14 The distance information is contained in the width of channels in the spectrum.…”

Section: Introductionmentioning

confidence: 99%

Wavelength-tuning interferometry of intraocular distances

et al. 1997

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We describe basic principles of wavelength-tuning interferometry and demonstrate its application in ophthalmology. The advantage of this technique compared with conventional low-coherence interferometry ranging is the simultaneous measurement of the object structure without the need for a moving reference mirror. Shifting the wavelength of an external-cavity tunable laser diode causes intensity oscillations in the interference pattern of light beams remitted from the intraocular structure. A Fourier transform of the corresponding wave-number-dependent photodetector signal yields the distribution of the scattering potential along the light beam illuminating the eye. We use an external interferometer to linearize the wave-number axis. We obtain high resolution in a model eye by slow tuning over a wide wavelength range. With lower resolution we demonstrate the simultaneous measurement of anterior segment length, vitreous chamber depth, and axial eye length in human eyes in vivo with data-acquisition times in the millisecond range.

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Thickness and Refractive Index Measurement of a Lamina with a Michelson Interferometer*

Cited by 9 publications

References 1 publication

Thin Films of Liquid Crystals Confined between Crystalline Surfaces

Thin Films of Liquid Crystals Confined between Crystalline Surfaces

Polarization phase-shifting Newton interferometer without errors caused by polarization crosstalk

Wavelength-tuning interferometry of intraocular distances

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