Results 211 to 220 of about 8,745 (262)
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Applied Optics, 2008
A new application of the optical vortex birefringence compensator has been presented. Two parameters of elliptically birefringent medium, an ellipticity angle and an optical path difference, can be measured simultaneously in the setup based on the C polarization type singularities generated using two Wollaston compensators.
Władysław A, Woźniak +1 more
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A new application of the optical vortex birefringence compensator has been presented. Two parameters of elliptically birefringent medium, an ellipticity angle and an optical path difference, can be measured simultaneously in the setup based on the C polarization type singularities generated using two Wollaston compensators.
Władysław A, Woźniak +1 more
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Measurements of birefringent media properties using optical vortex birefringence compensator
Applied Optics, 2007We present some applications of the optical vortex birefringence compensator, based on the C polarization type singularities generated using two Wollaston compensators. The theory and experimental results of birefringent media properties measurements are presented.
Monika, Borwińska +2 more
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Birefringence imaging with imperfect benches: application to large-scale birefringence measurements
Applied Optics, 2000We describe a birefringence measurement bench that allows fast two-dimensional measurements of low-birefringence fields in large transparent samples. We present calculations that show that, even when a birefringence bench exhibits defects (nonideal components, misalignments, etc.), measurements can be performed under realistic conditions without any a ...
G, de Villèle, V, Loriette
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Direct measurement of the birefringence of AgGaS2
Optics Communications, 1972Abstract We report a direct measurement of the birefringence of AgGaS 2 by the use of a fringes technique. Correct use of the very special properties of this crystal enabled us to define the absolute order of the interference fringes in each sample. Our results are compared to the previously published data.
C. Schwartz +3 more
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Birefringence Measurement of Liquid Crystals
Optica Acta: International Journal of Optics, 1979The cylindrical cell method for determining the refractive indices of liquid crystals is described. This method is based on the use of a cylindrical cell composed of a pair of semi-cylindrical prisms and the measurement of the incident angle dependence of transmitted light intensities.
Tadashi Akahane +2 more
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Interferometer for measuring polarization and birefringence
Optical Fabrication and Testing, 1996Optical instrument and component fabrication often involves sensitive measurements of the polarization state of light. A common way of determining the polarizing properties of a sample is to place it between crossed polarizers. The crossed-polarizer method is easy to perform and to understand, but it is not sensitive enough for many applications ...
Peter de Groot, James Soobitsky
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Birefringence measurement using a photoelastic modulator
Applied Optics, 1979A high frequency photoelastic modulator is used to measure birefringence. A new method for determining large retardations is described and assessed. Its application permits the measurement of the numerical birefringence without the need to evaluate the fringe order number explicitly.
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Microscale linear birefringence measurement
SPIE Proceedings, 2010A new method for linear birefringence measurement in micro-scale is presented. Mueller matrix is used to represent the anisotropy properties of sample, optical fiber probe of scanning optical near-field microscopy (SNOM) and other optical components. Two polarization modulators are used to complete the quantitative measurement.
Qing-Lin Wu +4 more
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Birefringence measurement of the cellophane film
SPIE Proceedings, 2014In this work we describe an experimental technique to measure the birefringence of the cellophane film that has good behavior as half wave retarder. This technique is achieved when the film is placed in a polariscope that consists of a light source and properly arranged polarizing elements and a system of fringes is observed.
Julio César Juárez-Ramírez +6 more
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Air-flow-birefringence measurement*
Journal of the Optical Society of America, 1975Air-flow birefringence in normal conditions of pressure and temperature is experimentally proved. Measurements of the change of the polarization of a plane wave propagating through a boundary layer are displayed for both laminar and turbulent flow.
G. R. Boyer +2 more
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