Numerical modelling of LCD electro
... with infinite lateral extension. Refractive indices and the director orientation vary only along one direction, usually the LCD normal. The amount of numerical calculations for the determination of the director configuration and the optical quantities like transmittance and reflectance is moderate c ...
... with infinite lateral extension. Refractive indices and the director orientation vary only along one direction, usually the LCD normal. The amount of numerical calculations for the determination of the director configuration and the optical quantities like transmittance and reflectance is moderate c ...
Department of Physics, Technical University Ostrava 17. listopadu
... as that in which the spectral interference fringes should be fully observable. It was revealed that due to the limited resolving power of the spectrometer S2000 [19] the OPDs between beams of the interferometer can be adjusted in the ranges approximately from –80 to –5 µm and from 5 to 80 µm. As an ...
... as that in which the spectral interference fringes should be fully observable. It was revealed that due to the limited resolving power of the spectrometer S2000 [19] the OPDs between beams of the interferometer can be adjusted in the ranges approximately from –80 to –5 µm and from 5 to 80 µm. As an ...
Optical Prescriptions Spectacle Lenses
... Any vibrations which are perpendicular to the polarization axis are blocked by the filter. Thus, a Polaroid filter with its long-chain molecules aligned horizontally will have a polarization axis aligned vertically. ...
... Any vibrations which are perpendicular to the polarization axis are blocked by the filter. Thus, a Polaroid filter with its long-chain molecules aligned horizontally will have a polarization axis aligned vertically. ...
PDF
... micron-thick sample by producing 10 frames in less than 5 ms. For repetitive processes, one can use only xy-scanning, refocusing it at different depth step-by step. The speed of imaging depends on many additional factors, such as needed contrast (integration time), size of the scanned area, camera a ...
... micron-thick sample by producing 10 frames in less than 5 ms. For repetitive processes, one can use only xy-scanning, refocusing it at different depth step-by step. The speed of imaging depends on many additional factors, such as needed contrast (integration time), size of the scanned area, camera a ...
Lec03 - nptel
... Skew rays propagate without passing through the central axis of the fiber. In fact the skew rays go on spiralling around the axis of the optical fiber. The light energy carried by them is effectively confined to an annular region around the axis as shown in figure 3.6. Consequently, at the output, s ...
... Skew rays propagate without passing through the central axis of the fiber. In fact the skew rays go on spiralling around the axis of the optical fiber. The light energy carried by them is effectively confined to an annular region around the axis as shown in figure 3.6. Consequently, at the output, s ...
Generation of radially and azimuthally polarized light by optical
... periods of the nanoslits exclude the grating effects, the transmitted light beam is slightly divergent due to the Fraunhofer diffraction caused by the finite size of the nanoslits. Simple estimation can yield that the objective with 0.6 numerical aperture can collect more than 90% of the transmitted ...
... periods of the nanoslits exclude the grating effects, the transmitted light beam is slightly divergent due to the Fraunhofer diffraction caused by the finite size of the nanoslits. Simple estimation can yield that the objective with 0.6 numerical aperture can collect more than 90% of the transmitted ...
Visible Light, Wide-Angle Graded Metasurface for Back Reflection
... In order to practically realize the proposed metasurface, we need to discretize the ideal phase profile in eq 1. Assuming an equal discretization of the ideal phase profile into N phase steps, the coupling efficiency to the retroreflected order gets closer to 100% as the number of steps increases (Supple ...
... In order to practically realize the proposed metasurface, we need to discretize the ideal phase profile in eq 1. Assuming an equal discretization of the ideal phase profile into N phase steps, the coupling efficiency to the retroreflected order gets closer to 100% as the number of steps increases (Supple ...
WRL0087.tmp
... For a practical fiber, the difference is the refractive indices of the core & the cladding is very small. This justifies certain approximation in the modal analysis. This approximation is called the ‘weakly guiding approximation’. The characteristic equations then can be simplified in this situation ...
... For a practical fiber, the difference is the refractive indices of the core & the cladding is very small. This justifies certain approximation in the modal analysis. This approximation is called the ‘weakly guiding approximation’. The characteristic equations then can be simplified in this situation ...
cut off frequency for different modes
... For a practical fiber, the difference is the refractive indices of the core & the cladding is very small. This justifies certain approximation in the modal analysis. This approximation is called the ‘weakly guiding approximation’. The characteristic equations then can be simplified in this situation ...
... For a practical fiber, the difference is the refractive indices of the core & the cladding is very small. This justifies certain approximation in the modal analysis. This approximation is called the ‘weakly guiding approximation’. The characteristic equations then can be simplified in this situation ...
Design and investigation of properties of nanocrystalline diamond
... Moreover, in both papers [7, 8] the NCD films were deposited on optically non-transparent substrates, which are rather mirrors and from the text in [7] it is not clear if the conditions for waveguiding properties are fulfilled. What concerns the NCD films deposited on Si [8] there could be found a p ...
... Moreover, in both papers [7, 8] the NCD films were deposited on optically non-transparent substrates, which are rather mirrors and from the text in [7] it is not clear if the conditions for waveguiding properties are fulfilled. What concerns the NCD films deposited on Si [8] there could be found a p ...
Different Types of Dispersions in an Optical Fiber
... dispersion. The number of modes in the fiber is about half that of step index fiber having the same diameter. Single mode step index fiber: Another way to reduce modal dispersion is to reduce the core's diameter, until the fiber only propagates one mode efficiently. The single mode fiber has an exce ...
... dispersion. The number of modes in the fiber is about half that of step index fiber having the same diameter. Single mode step index fiber: Another way to reduce modal dispersion is to reduce the core's diameter, until the fiber only propagates one mode efficiently. The single mode fiber has an exce ...
Reflection-mode scanning near-field optical microscopy: Influence
... The results of the previous sections show that topographic effects often override true optical contrast, introducing imaging artefacts. For this reason, we now present results of a study of polarization-dependent imaging where we show that for this case, optical effects can be stronger than topograp ...
... The results of the previous sections show that topographic effects often override true optical contrast, introducing imaging artefacts. For this reason, we now present results of a study of polarization-dependent imaging where we show that for this case, optical effects can be stronger than topograp ...
Tomographic Interference Microscopy of Living Cells
... uation of the projection data. Angular probing in tomography can be realized in two ways: angular scanning of the probing beam around a stationary sample; and rotation or scanning the sample through the stationary probing beam. The basic requirement of tomography is the necessity to collect as many ...
... uation of the projection data. Angular probing in tomography can be realized in two ways: angular scanning of the probing beam around a stationary sample; and rotation or scanning the sample through the stationary probing beam. The basic requirement of tomography is the necessity to collect as many ...
Measurement of refractive index of prism using spectrometer
... wavelength of the light. Therefore, to measure wavelengths using a prism, a calibration graph of the angle of deviation versus wavelength must be constructed using a light source with a known spectrum. The wavelength of unknown spectral lines can then be interpolated from the graph. Once a calibrat ...
... wavelength of the light. Therefore, to measure wavelengths using a prism, a calibration graph of the angle of deviation versus wavelength must be constructed using a light source with a known spectrum. The wavelength of unknown spectral lines can then be interpolated from the graph. Once a calibrat ...
Brewster angle with a negative-index material
... isotropic media is considered for the same coordinates shown in Fig. 1. For simplicity, it is assumed that the upper half of the space 共⫺⬁ ⬍ z ⬍ 0兲 is vacuum 共1 ⫽ 1 ⫽ 1兲 and the lower half of the space 共0 ⱕ z ⬍ ⫹⬁兲 is occupied by a dielectric–magnetic medium 共2, 2兲. A harmonic plane wave of angu ...
... isotropic media is considered for the same coordinates shown in Fig. 1. For simplicity, it is assumed that the upper half of the space 共⫺⬁ ⬍ z ⬍ 0兲 is vacuum 共1 ⫽ 1 ⫽ 1兲 and the lower half of the space 共0 ⱕ z ⬍ ⫹⬁兲 is occupied by a dielectric–magnetic medium 共2, 2兲. A harmonic plane wave of angu ...
Propagation of EM Waves in material media
... so we have four unknowns. Our equations are not all independent. We can simplify by decomposing the incident light into two specific linear polarizations. ...
... so we have four unknowns. Our equations are not all independent. We can simplify by decomposing the incident light into two specific linear polarizations. ...
Birefringence
Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive). The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with asymmetric crystal structures are often birefringent, as are plastics under mechanical stress.Birefringence is responsible for the phenomenon of double refraction whereby a ray of light, when incident upon a birefringent material, is split by polarization into two rays taking slightly different paths. This effect was first described by the Danish scientist Rasmus Bartholin in 1669, who observed it in calcite, a crystal having one of the strongest birefringences. However it was not until the 19th century that Augustin-Jean Fresnel described the phenomenon in terms of polarization, understanding light as a wave with field components in transverse polarizations (perpendicular to the direction of the wave vector).