Fabrication of functional surfaces using ultrashort laser pulse ablation
... with replication methods. It is well known that sufficiently small surface structures reflect and deflect light in a way that can not be handled with geometrical optics. Naturally, when considering materials like metals, only reflected waves are observed. If the periodicity of the structures is in t ...
... with replication methods. It is well known that sufficiently small surface structures reflect and deflect light in a way that can not be handled with geometrical optics. Naturally, when considering materials like metals, only reflected waves are observed. If the periodicity of the structures is in t ...
Document
... OAM. Some historical techniques,that require astigmatic lenses or complex interferometric setups are cumbersome, instable or difficult to mount and to align. The holographic technique, that uses computer generated holograms to control the phase profile of the beam is extremely versatile when the nec ...
... OAM. Some historical techniques,that require astigmatic lenses or complex interferometric setups are cumbersome, instable or difficult to mount and to align. The holographic technique, that uses computer generated holograms to control the phase profile of the beam is extremely versatile when the nec ...
1.5 MB
... system consists of a Wollaston prism working between the polarizer and the analyzer (Fig. 5). The measured light beam enters the system through the polarizer. The Wollaston prism splits the input wave into two: an ordinary and extraordinary one, so the optical field can be considered as two incident ...
... system consists of a Wollaston prism working between the polarizer and the analyzer (Fig. 5). The measured light beam enters the system through the polarizer. The Wollaston prism splits the input wave into two: an ordinary and extraordinary one, so the optical field can be considered as two incident ...
Monte Carlo Simulation of Light Scattering on a Sound Wave
... these methods are based on the fact that light absorption, which is a consequence of light and molecules interactions, take place on a slower time scale than light scattering. Thus, these processes can be resolved by a time− or f requency − domain measurement [22], [24]. The frequency-domain imaging ...
... these methods are based on the fact that light absorption, which is a consequence of light and molecules interactions, take place on a slower time scale than light scattering. Thus, these processes can be resolved by a time− or f requency − domain measurement [22], [24]. The frequency-domain imaging ...
Multiplexed Digital Holography incorporating Speckle
... important to capture the shape in a single exposure due to movements of the objects. Singleshot multiplexed holography can be accomplished by having different incident angles of the reference light for the different wavelengths, hence separating the information in the frequency space. As the shape m ...
... important to capture the shape in a single exposure due to movements of the objects. Singleshot multiplexed holography can be accomplished by having different incident angles of the reference light for the different wavelengths, hence separating the information in the frequency space. As the shape m ...
Light Microscopy
... 12V/50W). The collector lens forms an image of the lamp filament in the plane of the aperture diaphragm. Because this diaphragm is located in the focal plane of the condenser lens, the lamp image will be totally defocused in the specimen plane. Note that each point of the lamp filament will illumina ...
... 12V/50W). The collector lens forms an image of the lamp filament in the plane of the aperture diaphragm. Because this diaphragm is located in the focal plane of the condenser lens, the lamp image will be totally defocused in the specimen plane. Note that each point of the lamp filament will illumina ...
A pulsed dye laser for photo-ionization of magnesium atoms
... and the line width of the exciting laser are both smaller than than the isotope shift. Magnesium atoms can be ionized through a two-step process using a dipole allowed transition at 285 nm as resonant excitation step. Unfortunately, light at 285 nm is not easily produced by simple solid state laser ...
... and the line width of the exciting laser are both smaller than than the isotope shift. Magnesium atoms can be ionized through a two-step process using a dipole allowed transition at 285 nm as resonant excitation step. Unfortunately, light at 285 nm is not easily produced by simple solid state laser ...
Quantum Effects in Atomic Nanofabrication Using Light Forces
... were subsequently demonstrated. An detailed review of the demonstrated work is given in (Oberthaler and Pfau, 2003). Arbitrary patterns can not be easily realized because the decomposition of a desired light field distribution into the corresponding wave vectors is not known in general, however it wo ...
... were subsequently demonstrated. An detailed review of the demonstrated work is given in (Oberthaler and Pfau, 2003). Arbitrary patterns can not be easily realized because the decomposition of a desired light field distribution into the corresponding wave vectors is not known in general, however it wo ...
Composite optical vortices - RIT Center for Imaging Science
... carries orbital angular momentum.12 In general, when one beam is superimposed with another, the phase of the composite field differs from that of the component beams. Being a topological phase structure, an optical vortex is readily affected when it is combined with other fields. The new or ‘‘compos ...
... carries orbital angular momentum.12 In general, when one beam is superimposed with another, the phase of the composite field differs from that of the component beams. Being a topological phase structure, an optical vortex is readily affected when it is combined with other fields. The new or ‘‘compos ...
Microscopy - Frank`s Hospital Workshop
... interference contrast, or RIC). It is used to examine the adhesion of cells to a glass surface, using polarized light of a narrow range of wavelengths to be reflected whenever there is an interface between two substances with different refractive indices. Whenever a cell is attached to the glass sur ...
... interference contrast, or RIC). It is used to examine the adhesion of cells to a glass surface, using polarized light of a narrow range of wavelengths to be reflected whenever there is an interface between two substances with different refractive indices. Whenever a cell is attached to the glass sur ...
Generalized shifts and weak values for polarization components of
... internal reflection (where θ is greater than the critical angle arcsin n), in which case the reflection coefficient is complex and unimodular, |r| = 1. In the other case, partial reflection (which also has some transmission, which not considered here), sin θ < n, so r is real. Although the formulæar ...
... internal reflection (where θ is greater than the critical angle arcsin n), in which case the reflection coefficient is complex and unimodular, |r| = 1. In the other case, partial reflection (which also has some transmission, which not considered here), sin θ < n, so r is real. Although the formulæar ...
Numerical Analysis of Orbital Angular Momentum Based Next
... mutual opposite numbers of the two beams, their spiral directions of optical strength distributions are opposite (Fig. ...
... mutual opposite numbers of the two beams, their spiral directions of optical strength distributions are opposite (Fig. ...
this one in format - International Laser Display Association
... Kryptons are similar to argons (the same tube design can be used for both). However, kryptons give off less light power than an equivalent argon. Krypton lasers are primarily used when a powerful red light is needed. ...
... Kryptons are similar to argons (the same tube design can be used for both). However, kryptons give off less light power than an equivalent argon. Krypton lasers are primarily used when a powerful red light is needed. ...
\ 204 207 208 209 210 21g \ 221 /
... [0003] Many high poWer optical systems make use of Wavelength conversion to produce light having a desired Wavelength or range of Wavelengths. Often the process of conversion involves performing some non-linear optical Wavelength conversion on input light from a source, such as a MOPA source. The no ...
... [0003] Many high poWer optical systems make use of Wavelength conversion to produce light having a desired Wavelength or range of Wavelengths. Often the process of conversion involves performing some non-linear optical Wavelength conversion on input light from a source, such as a MOPA source. The no ...
Diffraction Gratings
... Note: The “evanescent” fields in material 2 are not completely evanescent. They have a purely real kx so they do flow energy in the transverse direction. Lecture 9 ...
... Note: The “evanescent” fields in material 2 are not completely evanescent. They have a purely real kx so they do flow energy in the transverse direction. Lecture 9 ...
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.