HoloPy Documentation
... HoloPy is a python based tool for working with digital holograms and light scattering. HoloPy can be used to analyze holograms in two complementary ways: • Backward propagation of light from a digital hologram to reconstruct 3D volumes. – This approach requires no prior knowledge about the scatterer ...
... HoloPy is a python based tool for working with digital holograms and light scattering. HoloPy can be used to analyze holograms in two complementary ways: • Backward propagation of light from a digital hologram to reconstruct 3D volumes. – This approach requires no prior knowledge about the scatterer ...
Heriot-Watt University Multi-millijoule few-cycle mid
... YAG) plate oriented at the Brewster angle and placed at a distance of 50 cm from the focal plane of a lens with the focal distance of 75 cm. For the characterization a fraction of the radiation is picked up by a CaF2 wedge directly after the YAG plate and directed into the SHG FROG apparatus and spe ...
... YAG) plate oriented at the Brewster angle and placed at a distance of 50 cm from the focal plane of a lens with the focal distance of 75 cm. For the characterization a fraction of the radiation is picked up by a CaF2 wedge directly after the YAG plate and directed into the SHG FROG apparatus and spe ...
Microscopes - Photonics Research Group
... eyepiece, albeit with residual error of the secondary spectrum and appreciable curvature of field. Early high-resolution compound microscopes were equipped with an (oilimmersible) Abbe condenser whose iris diaphragm, placed at the front focal plane of the condenser, could be off-centered to achieve ...
... eyepiece, albeit with residual error of the secondary spectrum and appreciable curvature of field. Early high-resolution compound microscopes were equipped with an (oilimmersible) Abbe condenser whose iris diaphragm, placed at the front focal plane of the condenser, could be off-centered to achieve ...
PDF
... object along the beam axis. A focused Gaussian beam has light intensity gradients both along the beam axis and perpendicular to it. The resulting optical gradient forces pul the high-index objects towards the focus with the highest intensity, and a stable trapping is achieved when they overcome the ...
... object along the beam axis. A focused Gaussian beam has light intensity gradients both along the beam axis and perpendicular to it. The resulting optical gradient forces pul the high-index objects towards the focus with the highest intensity, and a stable trapping is achieved when they overcome the ...
MPE Tutorial Multiphoton Excitation Microscopy 5100 Patrick Henry Drive
... Direct coupling (used in the CalTech system shown earlier) provides a simple solution for delivery of ultrafast pulses at a higher average power than is possible with a fiber delivery set-up. However, maintaining alignment of the relay mirrors can be a problem, and the beam path should be enclosed t ...
... Direct coupling (used in the CalTech system shown earlier) provides a simple solution for delivery of ultrafast pulses at a higher average power than is possible with a fiber delivery set-up. However, maintaining alignment of the relay mirrors can be a problem, and the beam path should be enclosed t ...
Optical Resonators and Mode Matching
... A set of two or more mirrors arranged to cause light to propagate in a closed path is variously called an optical resonator, an optical cavity, and in certain contexts, an optical interferometer. Optical resonator along with optical gain are the basic elements of every laser, optical resonators are ...
... A set of two or more mirrors arranged to cause light to propagate in a closed path is variously called an optical resonator, an optical cavity, and in certain contexts, an optical interferometer. Optical resonator along with optical gain are the basic elements of every laser, optical resonators are ...
Disorder-Enhanced Imaging with Spatially Controlled Light
... Despite their enormous advancements, conventional optical elements -no matter how well designed- can offer only a limited amount of control over light. In as early as 1873 Abbe[3] discovered that lens-based microscopes are unable to resolve structure smaller than half the light’s wavelength. This re ...
... Despite their enormous advancements, conventional optical elements -no matter how well designed- can offer only a limited amount of control over light. In as early as 1873 Abbe[3] discovered that lens-based microscopes are unable to resolve structure smaller than half the light’s wavelength. This re ...
ABSTRACT Dissertation: STUDIES OF
... With the prevalence of nano-tools, such as e-beam lithography, focused ion beam (FIB), atomic-force microscopes (AFM), near-field scanning optical microscopes (NSOM) and tunneling-electronic microscopes (TEM), science research has entered a tiny world on a nanometer scale. How small is this? Compari ...
... With the prevalence of nano-tools, such as e-beam lithography, focused ion beam (FIB), atomic-force microscopes (AFM), near-field scanning optical microscopes (NSOM) and tunneling-electronic microscopes (TEM), science research has entered a tiny world on a nanometer scale. How small is this? Compari ...
Construction of a 408 nm Laser System for Use in Ion Interferometry
... along two distinct paths. At some later point, the waves from the two paths are recombined. The output of the interferometer depends on the relative phase acquired by the wave as it travels along the two distinct paths of the interferometer. The goal of the ion interferometer project is to create an ...
... along two distinct paths. At some later point, the waves from the two paths are recombined. The output of the interferometer depends on the relative phase acquired by the wave as it travels along the two distinct paths of the interferometer. The goal of the ion interferometer project is to create an ...
Optical properties of small-bore hollow glass waveguides
... When the waveguides are used in medical or industrial applications, it is often desirable to maintain the spatial purity of the input laser beam because it is necessary to cut or ablate with as small a spot size as possible. To evaluate the mode purity of the output beam, we measured the output beam ...
... When the waveguides are used in medical or industrial applications, it is often desirable to maintain the spatial purity of the input laser beam because it is necessary to cut or ablate with as small a spot size as possible. To evaluate the mode purity of the output beam, we measured the output beam ...
Comprehensive and reliable diagnostics for the corona of laser
... error σ induced by the deflection of the rays can be approximated as σ = L • θ . For L ~ 300 µm, in order to control the total error under 20 µm, the error of refraction should be less than < 15 µm, so that θ<0.05. The maximum accessible electron density ne is ~ 6×1019cm-3 for a 532nm probe beams by ...
... error σ induced by the deflection of the rays can be approximated as σ = L • θ . For L ~ 300 µm, in order to control the total error under 20 µm, the error of refraction should be less than < 15 µm, so that θ<0.05. The maximum accessible electron density ne is ~ 6×1019cm-3 for a 532nm probe beams by ...
Lights, action: optical tweezers
... transparent objects in a relatively transparent medium. He later discovered that a single, tightly focused laser beam could be used to capture small dielectric particles in three dimensions. This technique enables small particles to be picked up and moved at will using a beam of visible light and he ...
... transparent objects in a relatively transparent medium. He later discovered that a single, tightly focused laser beam could be used to capture small dielectric particles in three dimensions. This technique enables small particles to be picked up and moved at will using a beam of visible light and he ...
الشريحة 1
... A slit which is wider than a wavelength produces interference effects in the space downstream of the slit. These can be explained by assuming that the slit behaves as though it has a large number of point sources spaced evenly across the width of the slit. The analysis of this system is simplified i ...
... A slit which is wider than a wavelength produces interference effects in the space downstream of the slit. These can be explained by assuming that the slit behaves as though it has a large number of point sources spaced evenly across the width of the slit. The analysis of this system is simplified i ...
Self-Accelerating Self-Trapped Optical Beams
... stable fashion (Fig. 1, bottom right). Second, accelerating beams under weak self-focusing are also stable (Fig. 1, bottom center). However, accelerating beams under strong self-focusing are unstable: the strong lobes of the beam form solitons, which are emitted in various directions (Fig. 1, bottom ...
... stable fashion (Fig. 1, bottom right). Second, accelerating beams under weak self-focusing are also stable (Fig. 1, bottom center). However, accelerating beams under strong self-focusing are unstable: the strong lobes of the beam form solitons, which are emitted in various directions (Fig. 1, bottom ...
genius PHYSICS by Pradeep Kshetrapal Newtons corpuscular
... (8) Identification of central bright fringe To identify central bright fringe, monochromatic light is replaced by white light. Due to overlapping central maxima will be white with red edges. On the other side of it we shall get a few coloured band and then uniform illumination. (9) Condition for obs ...
... (8) Identification of central bright fringe To identify central bright fringe, monochromatic light is replaced by white light. Due to overlapping central maxima will be white with red edges. On the other side of it we shall get a few coloured band and then uniform illumination. (9) Condition for obs ...
“ waves, yielding a resultant irradiance that may deviate from the... component irradiances. r
... 1) Silvered surface of beam-splitter (BS) is towards right side (back side). 2) Beam which is reflected by M2 passes through glass of BS three times. 3) Beam which is reflected by M1 passes through glass of BS once. We need to insert “compensator plate” C in arm OM1. Exact Duplicate of BS without th ...
... 1) Silvered surface of beam-splitter (BS) is towards right side (back side). 2) Beam which is reflected by M2 passes through glass of BS three times. 3) Beam which is reflected by M1 passes through glass of BS once. We need to insert “compensator plate” C in arm OM1. Exact Duplicate of BS without th ...
AS Waves and Optics
... The violinist presses on the string at C to shorten the part of the string that vibrates. Figure 2 shows the string between C and B vibrating in its fundamental mode. The length of the whole string is 320 mm and the distance between C and B is 240 mm. ...
... The violinist presses on the string at C to shorten the part of the string that vibrates. Figure 2 shows the string between C and B vibrating in its fundamental mode. The length of the whole string is 320 mm and the distance between C and B is 240 mm. ...
Holography
Holography is the science and practice of making holograms. Typically, a hologram is a photographic recording of a light field, rather than of an image formed by a lens, and it is used to display a fully three-dimensional image of the holographed subject, which is seen without the aid of special glasses or other intermediate optics. The hologram itself is not an image and it is usually unintelligible when viewed under diffuse ambient light. It is an encoding of the light field as an interference pattern of seemingly random variations in the opacity, density, or surface profile of the photographic medium. When suitably lit, the interference pattern diffracts the light into a reproduction of the original light field and the objects that were in it appear to still be there, exhibiting visual depth cues such as parallax and perspective that change realistically with any change in the relative position of the observer.In its pure form, holography requires the use of laser light for illuminating the subject and for viewing the finished hologram. In a side-by-side comparison under optimal conditions, a holographic image is visually indistinguishable from the actual subject, if the hologram and the subject are lit just as they were at the time of recording. A microscopic level of detail throughout the recorded volume of space can be reproduced. In common practice, however, major image quality compromises are made to eliminate the need for laser illumination when viewing the hologram, and sometimes, to the extent possible, also when making it. Holographic portraiture often resorts to a non-holographic intermediate imaging procedure, to avoid the hazardous high-powered pulsed lasers otherwise needed to optically ""freeze"" living subjects as perfectly as the extremely motion-intolerant holographic recording process requires. Holograms can now also be entirely computer-generated and show objects or scenes that never existed.Holography should not be confused with lenticular and other earlier autostereoscopic 3D display technologies, which can produce superficially similar results but are based on conventional lens imaging. Stage illusions such as Pepper's Ghost and other unusual, baffling, or seemingly magical images are also often incorrectly called holograms.