Optical properties of small-bore hollow glass waveguides
... be due to deformation of the bore of fibers by the sharp bending. Further theoretical and experimental investigations, including mode conversion and the polarization shift, are underway; the results will be reported elsewhere. ...
... be due to deformation of the bore of fibers by the sharp bending. Further theoretical and experimental investigations, including mode conversion and the polarization shift, are underway; the results will be reported elsewhere. ...
Absorption and fluorescence spectra of poly
... Absorption spectra and fluorescence excitation and emission spectra of PET films have been reported previously8' 9 . We have essentially reproduced this previous work. The spectra of PET dissolved in HFIP are qualitatively similar to that of PET films, but several crucial differences exist. In Figur ...
... Absorption spectra and fluorescence excitation and emission spectra of PET films have been reported previously8' 9 . We have essentially reproduced this previous work. The spectra of PET dissolved in HFIP are qualitatively similar to that of PET films, but several crucial differences exist. In Figur ...
Optical switches
... Semiconductor laser • LASER (Light Amplification by Stimulated Emission of Radiation) • Semiconductor laser is also known as laser diode and injection laser • Operation of a laser is the same as for any other oscillator - gain (amplification) and feedback • As a device semiconductor laser is similar ...
... Semiconductor laser • LASER (Light Amplification by Stimulated Emission of Radiation) • Semiconductor laser is also known as laser diode and injection laser • Operation of a laser is the same as for any other oscillator - gain (amplification) and feedback • As a device semiconductor laser is similar ...
Optical measurement technique with telecentric lenses
... But in the course of writing it became very soon evident that we had to deal with more then only explaining the laws of telecentric perspective. This because of various reasons: ...
... But in the course of writing it became very soon evident that we had to deal with more then only explaining the laws of telecentric perspective. This because of various reasons: ...
Morphology of basal cell carcinoma in high
... the typical layering of the epidermis and dermis was disarranged as it has been described elsewhere.13 In the HD-OCT images we noted a dark rim surrounding frequently the grey tumour nodules which we called ‘peripheral rimming’ and which has not been described explicitly in the literature of convent ...
... the typical layering of the epidermis and dermis was disarranged as it has been described elsewhere.13 In the HD-OCT images we noted a dark rim surrounding frequently the grey tumour nodules which we called ‘peripheral rimming’ and which has not been described explicitly in the literature of convent ...
New Methods in Cardiovascular Biology
... 15 to 20 consecutive sweeps before and after 5 minutes of perfusion of 10 µmol/L isoproterenol. Data were recorded at a sampling rate of 10 kHz and filtered at 2 kHz. The applied voltage was corrected for a liquid junction potential of −16.7 mV. For recording of sodium currents, pipettes were filled ...
... 15 to 20 consecutive sweeps before and after 5 minutes of perfusion of 10 µmol/L isoproterenol. Data were recorded at a sampling rate of 10 kHz and filtered at 2 kHz. The applied voltage was corrected for a liquid junction potential of −16.7 mV. For recording of sodium currents, pipettes were filled ...
Pulsed Quasi-monochromatic x-ray source for radiography
... the spectral range 7.9 – 9.4 Å (1.32 - 1.57 keV) of the gold plasma for the x-ray probing. After reflection from the crystal plane, the probe beam is incident on the detector (x-ray CCD camera of M/s Rigaku). The pixel size of the CCD camera is 13.5 µm x 13.5 µm. It can also accommodate Phosphor scr ...
... the spectral range 7.9 – 9.4 Å (1.32 - 1.57 keV) of the gold plasma for the x-ray probing. After reflection from the crystal plane, the probe beam is incident on the detector (x-ray CCD camera of M/s Rigaku). The pixel size of the CCD camera is 13.5 µm x 13.5 µm. It can also accommodate Phosphor scr ...
Telescopes and spectrographs
... directly on a detector such as photographic film. Real images are those images made by the convergence of actual rays of light. However, when eyepiece lenses are used with telescopes, the final image formed by the telescope is said to be a virtual image, since it is situated at a location from which ...
... directly on a detector such as photographic film. Real images are those images made by the convergence of actual rays of light. However, when eyepiece lenses are used with telescopes, the final image formed by the telescope is said to be a virtual image, since it is situated at a location from which ...
Director of laser and plasma research center, University of Baghdad
... 13- Effect of N2 laser flounce on Lactic acid production by Streptococcus thermopiles, Iraqi J. Laser, part B, Vol. 1, No. 1, (2002), pp. (55-62). 14- Lasing line excitation mechanism in hollow cathode plasma. Iraqi J.Sci, Vol.43-c, No.1, 2002. 15- Fluorescence lifetime measurement of C6H6 and C6D6, ...
... 13- Effect of N2 laser flounce on Lactic acid production by Streptococcus thermopiles, Iraqi J. Laser, part B, Vol. 1, No. 1, (2002), pp. (55-62). 14- Lasing line excitation mechanism in hollow cathode plasma. Iraqi J.Sci, Vol.43-c, No.1, 2002. 15- Fluorescence lifetime measurement of C6H6 and C6D6, ...
Axial intensity of apertured Bessel beams
... To explain the resemblance effect, let us begin with the crude representation of Fig. 1(a), where we assume for a moment that the field propagating behind the aperture plane (z 5 0) can be described by geometrical optics. The gray area schematizes the illuminated region. Starting from the origin O a ...
... To explain the resemblance effect, let us begin with the crude representation of Fig. 1(a), where we assume for a moment that the field propagating behind the aperture plane (z 5 0) can be described by geometrical optics. The gray area schematizes the illuminated region. Starting from the origin O a ...
After referees Review article final_FINAL3
... collection time is used translating the stage, particularly when mapping large samples. Reduced throughput of light through the aperture coupled with the low brightness of conventional FTIR benchtop sources impacts on signal to noise and often leads to excessive measurement times (hours or even days ...
... collection time is used translating the stage, particularly when mapping large samples. Reduced throughput of light through the aperture coupled with the low brightness of conventional FTIR benchtop sources impacts on signal to noise and often leads to excessive measurement times (hours or even days ...
Effective Area of Optical Fibres
... suggested that the correction factor for dispersion-shifted fibres is approximately 0.95 and is only slightly dependent on the actual refractive index profile of the fibre. Similar measurements performed on large effective area fibres gave values of k Nam in the range 1.03 to 1.17 and showed strong ...
... suggested that the correction factor for dispersion-shifted fibres is approximately 0.95 and is only slightly dependent on the actual refractive index profile of the fibre. Similar measurements performed on large effective area fibres gave values of k Nam in the range 1.03 to 1.17 and showed strong ...
Optical Fiber Amplifiers
... In fiber optic systems amplification of the signal is necessary because no fiber material is absolutely transparent. This causes the infrared light (usually around 1530nm) carried by a fiber to be attenuated as it travels through the material. Because of this attenuation, repeaters must be used in s ...
... In fiber optic systems amplification of the signal is necessary because no fiber material is absolutely transparent. This causes the infrared light (usually around 1530nm) carried by a fiber to be attenuated as it travels through the material. Because of this attenuation, repeaters must be used in s ...
Lecture 11: Semiconductor lasers and light
... • An LED can be directly modulated by applying the modulation signal to the injection current, an approach known as direct current-modulation. • There are two factors that limit the modulation bandwidth of an LED: the junction capacitance and the diffusion capacitance. • Because an LED is operated u ...
... • An LED can be directly modulated by applying the modulation signal to the injection current, an approach known as direct current-modulation. • There are two factors that limit the modulation bandwidth of an LED: the junction capacitance and the diffusion capacitance. • Because an LED is operated u ...
Quantifying bacteria internalization by macrophage
... modules to precisely define the macrophage volume (Figure 1c, green) and to identify and enumerate internalized (figure 1d, cyan) as well as external GBS (red). The statistical functions of Imaris calculated the ratio between intracellular and extracellular GBS. When the researchers performed the sa ...
... modules to precisely define the macrophage volume (Figure 1c, green) and to identify and enumerate internalized (figure 1d, cyan) as well as external GBS (red). The statistical functions of Imaris calculated the ratio between intracellular and extracellular GBS. When the researchers performed the sa ...
Fourier, Fresnel and Image CGHs of three
... Model XGA3) with a collimated beam emerging from a He-Ne laser radiating at 632.8nm. Several experiments were conducted to verify the above-mentioned concept. The entire types of holograms were encoded into positive, real valued function in order to be displayed on the SLM. The parameter b (see Ref. ...
... Model XGA3) with a collimated beam emerging from a He-Ne laser radiating at 632.8nm. Several experiments were conducted to verify the above-mentioned concept. The entire types of holograms were encoded into positive, real valued function in order to be displayed on the SLM. The parameter b (see Ref. ...
Template BR_Rec_2002.dot
... aperture – NA) of the fibre. Propagation delays of the pulse-carrying rays reflected form boundary to boundary in the core increase with distance. The cliff effect distance of multimode fibre, calculated from its “bandwidth-kilometre” rating (see above), is that distance at which the signal is no lo ...
... aperture – NA) of the fibre. Propagation delays of the pulse-carrying rays reflected form boundary to boundary in the core increase with distance. The cliff effect distance of multimode fibre, calculated from its “bandwidth-kilometre” rating (see above), is that distance at which the signal is no lo ...
Sparse synthetic aperture with Fresnel elements (S
... interference occurs between two closely spaced spherical waves with different curve radii, rather than between spherical and plane waves, as was done in Refs [10–13]. In addition, a new simple technique to tile the sub-holograms into a large synthetic hologram, called the true position calibration t ...
... interference occurs between two closely spaced spherical waves with different curve radii, rather than between spherical and plane waves, as was done in Refs [10–13]. In addition, a new simple technique to tile the sub-holograms into a large synthetic hologram, called the true position calibration t ...
Fluorescence of coumarins and xanthenes after two
... low. To prove that one can conclude that the peak power of the laser pulses is from the cw power, we performed a simple experiment. The cw power of the titanium–sapphire laser was measured 3 times with different metal-coated filters for attenuation of the laser beam. In experiment 1a2 the full power ...
... low. To prove that one can conclude that the peak power of the laser pulses is from the cw power, we performed a simple experiment. The cw power of the titanium–sapphire laser was measured 3 times with different metal-coated filters for attenuation of the laser beam. In experiment 1a2 the full power ...
A Non-Contact Pulse Automatic Positioning Measurement System
... the pulse is the blood fluctuation phenomenon triggered by the aortic wall’s elastic relaxation and contraction caused by cardiac ejection. The tip of the artery experiences a similar wave-like fluctuation, also known as the pulse wave [1–4]. Cardiac ejection can cause different states of blood volu ...
... the pulse is the blood fluctuation phenomenon triggered by the aortic wall’s elastic relaxation and contraction caused by cardiac ejection. The tip of the artery experiences a similar wave-like fluctuation, also known as the pulse wave [1–4]. Cardiac ejection can cause different states of blood volu ...
Quantitative prediction of the modulation behavior of twisted nematic liquid
... A method to perform a predictive search for a given amplitude and phase modulation response in twisted nematic liquid crystal displays is presented. The algorithm is based on a simple physical model that we recently proposed and that considers the effect of liquid crystal layers located in the vicin ...
... A method to perform a predictive search for a given amplitude and phase modulation response in twisted nematic liquid crystal displays is presented. The algorithm is based on a simple physical model that we recently proposed and that considers the effect of liquid crystal layers located in the vicin ...
Technologies - E
... 1.5. Integrated Optics (8) 1.6. Sub-wavelength-diameter silica wires for low-loss optical wave guiding (1) ...
... 1.5. Integrated Optics (8) 1.6. Sub-wavelength-diameter silica wires for low-loss optical wave guiding (1) ...
Optical Fourier techniques for medical image processing and phase
... and output power 10 mW is expanded to a spatially uniform beam. Light transmitted through the object is focused by the Fourier lens. At the Fourier plane, various spatial filters are used for blocking undesirable components. Through an inverse Fourier transformation, the filtered frequency components ...
... and output power 10 mW is expanded to a spatially uniform beam. Light transmitted through the object is focused by the Fourier lens. At the Fourier plane, various spatial filters are used for blocking undesirable components. Through an inverse Fourier transformation, the filtered frequency components ...
Generation of diffractive optical elements onto a photopolymer using a
... Liquid crystal displays (LCDs) are widely used as spatial light modulators (SLMs) in many applications (optical signal processing, holographic data storage, diffractive optics…). In particular, as an alternative microoptics recording scheme we have explored the possibility to use a LCD to display th ...
... Liquid crystal displays (LCDs) are widely used as spatial light modulators (SLMs) in many applications (optical signal processing, holographic data storage, diffractive optics…). In particular, as an alternative microoptics recording scheme we have explored the possibility to use a LCD to display th ...
Biomedical Imaging and Applied Optics Laboratory
... spheroidal scatterers whose interactions with light are governed by Mie theory. Mie theory provides an analytical closed-form description of optical scattering from single spheroidal particles as a function of particle size, refractive index, wavelength, observation angle, and optical polarization. ...
... spheroidal scatterers whose interactions with light are governed by Mie theory. Mie theory provides an analytical closed-form description of optical scattering from single spheroidal particles as a function of particle size, refractive index, wavelength, observation angle, and optical polarization. ...
Confocal microscopy
Confocal microscopy is an optical imaging technique for increasing optical resolution and contrast of a micrograph by means of adding a spatial pinhole placed at the confocal plane of the lens to eliminate out-of-focus light. It enables the reconstruction of three-dimensional structures from the obtained images. This technique has gained popularity in the scientific and industrial communities and typical applications are in life sciences, semiconductor inspection and materials science.