P approximation for reflectance imaging with an oblique beam of arbitrary profile 1
... of the same suspension with uniform thickness. We employed a thermoelectrically cooled 16-bit charge coupled device 共CCD兲 camera 共ST-7, SBIG兲, oriented along the normal direction of the sample surface, to measure images Imr0共x , y兲 of reflected light at with a camera lens of 25 mm focal length. Th ...
... of the same suspension with uniform thickness. We employed a thermoelectrically cooled 16-bit charge coupled device 共CCD兲 camera 共ST-7, SBIG兲, oriented along the normal direction of the sample surface, to measure images Imr0共x , y兲 of reflected light at with a camera lens of 25 mm focal length. Th ...
Intermittent measurement
... Besides single wavelength monitoring broad-band monitoring is another approach which was investigated since the 1970’s 8. With silicon array detectors 256, 512 or 1024 wavelengths can be monitored at the same time. Today fast CCD array detectors are commercial available. In reference 9 a direct mea ...
... Besides single wavelength monitoring broad-band monitoring is another approach which was investigated since the 1970’s 8. With silicon array detectors 256, 512 or 1024 wavelengths can be monitored at the same time. Today fast CCD array detectors are commercial available. In reference 9 a direct mea ...
Coherent x-rays: overview
... The coherence width is thus the maximum transverse spacing of a pair of points from which the light signals can interfere to give fringes of “reasonable” contrast ...
... The coherence width is thus the maximum transverse spacing of a pair of points from which the light signals can interfere to give fringes of “reasonable” contrast ...
19th Century Ether Theory.1
... determination of the velocity of light. There had been only one other phenomenon, the explanation of which involved a finite and fixed velocity of light. In 1670 Ole Römer (1644–1710) had invoked this notion to explain the observed variations in the period between two successive eclipses of Jupiter’ ...
... determination of the velocity of light. There had been only one other phenomenon, the explanation of which involved a finite and fixed velocity of light. In 1670 Ole Römer (1644–1710) had invoked this notion to explain the observed variations in the period between two successive eclipses of Jupiter’ ...
Terahertz spectrum analyzer based on a terahertz frequency comb
... Frequency is a fundamental physical quantity of electromagnetic wave. Therefore, various techniques have been established to measure the frequency of electromagnetic waves. Interferometry is often used in the optical region. For precise measurements, the number of interference fringes of a measured ...
... Frequency is a fundamental physical quantity of electromagnetic wave. Therefore, various techniques have been established to measure the frequency of electromagnetic waves. Interferometry is often used in the optical region. For precise measurements, the number of interference fringes of a measured ...
An ultrafast reconfigurable nanophotonic switch using
... output of the medium was a random speckle pattern, limiting its use for applications. In the current work, we extend the idea of multimode dephasing by combining it with wavefront shaping to control both the destructive and constructive interference in a shaped light field on ultrafast time scale. B ...
... output of the medium was a random speckle pattern, limiting its use for applications. In the current work, we extend the idea of multimode dephasing by combining it with wavefront shaping to control both the destructive and constructive interference in a shaped light field on ultrafast time scale. B ...
Department of Physics, Chemistry and Biology
... Light reflected from the scarab beetles Cetonia aurata (C. aurata) and Chrysina gloriosa (C. gloriosa) has left-handed polarization. In this work the polarizing properties and structural characteristics of the cuticles of these two beetles are investigated with two different techniques: scanning ele ...
... Light reflected from the scarab beetles Cetonia aurata (C. aurata) and Chrysina gloriosa (C. gloriosa) has left-handed polarization. In this work the polarizing properties and structural characteristics of the cuticles of these two beetles are investigated with two different techniques: scanning ele ...
Why Did John Herschel Fail to Understand Polarization
... unless they be Bodies, can have a permanent Virtue in two of their Sides which is not in their other Sides’ (Newton, 1952, p. 374), using ‘side’ to undermine Huygens’s wave theory, which assumed light to be longitudinal vibrations and thus spatially symmetrical. Later Malus assumed that spatial asym ...
... unless they be Bodies, can have a permanent Virtue in two of their Sides which is not in their other Sides’ (Newton, 1952, p. 374), using ‘side’ to undermine Huygens’s wave theory, which assumed light to be longitudinal vibrations and thus spatially symmetrical. Later Malus assumed that spatial asym ...
Interferometry
Interferometry is a family of techniques in which waves, usually electromagnetic, are superimposed in order to extract information about the waves. Interferometry is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications to chemistry), quantum mechanics, nuclear and particle physics, plasma physics, remote sensing, biomolecular interactions, surface profiling, microfluidics, mechanical stress/strain measurement, and velocimetry.Interferometers are widely used in science and industry for the measurement of small displacements, refractive index changes and surface irregularities. In analytical science, interferometers are used in continuous wave Fourier transform spectroscopy to analyze light containing features of absorption or emission associated with a substance or mixture. An astronomical interferometer consists of two or more separate telescopes that combine their signals, offering a resolution equivalent to that of a telescope of diameter equal to the largest separation between its individual elements.