1 L2: Reflection and Refraction c3.L2 REFLECTION AND
... Colours of objects can be explained by supposing that their surfaces reflect different proportions of the various frequency (or wavelength) components of the incident light. Different mixes of these components produce the different visual sensations that we call colour. It is worth noting in passing ...
... Colours of objects can be explained by supposing that their surfaces reflect different proportions of the various frequency (or wavelength) components of the incident light. Different mixes of these components produce the different visual sensations that we call colour. It is worth noting in passing ...
Picosecond-resolution soft-x-ray laser plasma interferometry
... the DGI, when aligning. This prevents the fringes from the IR alignment laser from being observed at the output of the DGI. However, the first diffracted order off the second grating can be used instead for this purpose. In this case the intensity of both orders is similar because each undergoes a r ...
... the DGI, when aligning. This prevents the fringes from the IR alignment laser from being observed at the output of the DGI. However, the first diffracted order off the second grating can be used instead for this purpose. In this case the intensity of both orders is similar because each undergoes a r ...
Department of Physics, Technical University Ostrava 17. listopadu
... has to be fulfilled. It results from eq. (4) that knowing the unwrapped phase function Φ(λ) and the refractive index dispersion n(λ), the interference order m and thus the difference of path lengths between the interfering beams in the air 2L and the overall effective thickness t ef − t can be deter ...
... has to be fulfilled. It results from eq. (4) that knowing the unwrapped phase function Φ(λ) and the refractive index dispersion n(λ), the interference order m and thus the difference of path lengths between the interfering beams in the air 2L and the overall effective thickness t ef − t can be deter ...
C-Point singularities in Poincare beams
... Polarization singularities are a type of optical singularities that arise when one of the parameters specifying the polarization of the light is undefined [1]. In particular, C-points are singularities present in a field of polarization ellipses, where the orientation of the ellipse is undefined. Th ...
... Polarization singularities are a type of optical singularities that arise when one of the parameters specifying the polarization of the light is undefined [1]. In particular, C-points are singularities present in a field of polarization ellipses, where the orientation of the ellipse is undefined. Th ...
Two-dimensional modulational instability in photorefractive media M Saffman , Glen McCarthy
... barium niobate as the nonlinear medium. The experimental set-up is analogous to that used in our earlier studies of photorefractive soliton formation [13]. The crystal was 5 × 5 × 10 mm3 in size with the optical beam propagating along the 10 mm axis and a DC electric field of 1.1 kV applied along th ...
... barium niobate as the nonlinear medium. The experimental set-up is analogous to that used in our earlier studies of photorefractive soliton formation [13]. The crystal was 5 × 5 × 10 mm3 in size with the optical beam propagating along the 10 mm axis and a DC electric field of 1.1 kV applied along th ...
OM1 - Faculty of Engineering
... understand the meanings of the simple forms. With BST at A2, trace the beam until M2. Make sure M2 can capture the beam. Adjust M1 mounting post if necessary (do not accidentally knock down BST). Move BST to A5 (block the beam first). Using a plastic ruler, record the center-height h of the beam jus ...
... understand the meanings of the simple forms. With BST at A2, trace the beam until M2. Make sure M2 can capture the beam. Adjust M1 mounting post if necessary (do not accidentally knock down BST). Move BST to A5 (block the beam first). Using a plastic ruler, record the center-height h of the beam jus ...
Michelson Interferometer
... observed. Note down the micrometer screw reading and count the number of fringes that disappear (or appear) at the centre of the fringe system. Take 6 sets of readings each for the appearance/disappearance of 50 fringes and plot a graph of micrometer reading versus fringe number. Alternatively, you ...
... observed. Note down the micrometer screw reading and count the number of fringes that disappear (or appear) at the centre of the fringe system. Take 6 sets of readings each for the appearance/disappearance of 50 fringes and plot a graph of micrometer reading versus fringe number. Alternatively, you ...
Signal-to-Signal-to-Noise-Ratio of Full-Field Fourier
... In 3F-OCT we use a holographic interferometer instead of the Michelson interferometer typically used for “flying spot” OCT configurations. Here for simplicity we describe 3F-OCT in the transmission mode (extendable to reflection mode). Our optical source is launched into a fiber-optic coupler which ...
... In 3F-OCT we use a holographic interferometer instead of the Michelson interferometer typically used for “flying spot” OCT configurations. Here for simplicity we describe 3F-OCT in the transmission mode (extendable to reflection mode). Our optical source is launched into a fiber-optic coupler which ...
Advanced Microscopy
... 4.1.1 wide field microscopy 4.1.2 confocal microscopy 4.1.3 photothermal microscopy 4.1.4 STED microscopy below the diffraction limit 4.1.5 PALM/STORM detection techniques for super-resolution ...
... 4.1.1 wide field microscopy 4.1.2 confocal microscopy 4.1.3 photothermal microscopy 4.1.4 STED microscopy below the diffraction limit 4.1.5 PALM/STORM detection techniques for super-resolution ...
Chapter 9 Notes
... It acts as a window on the dimly lit side. If a bright light is turned on in the dimmer room, the “one-way” effect is ...
... It acts as a window on the dimly lit side. If a bright light is turned on in the dimmer room, the “one-way” effect is ...
Measuring amplitude and phase of light emerging from
... Amplitude and phase fields of light emerging from periodic structures, although considered by many researchers, are still an interesting subject of research. Talbot observed the self-imaging effect of a periodic structure in 18364. Later, Lord Rayleigh showed that its origin is the interference of t ...
... Amplitude and phase fields of light emerging from periodic structures, although considered by many researchers, are still an interesting subject of research. Talbot observed the self-imaging effect of a periodic structure in 18364. Later, Lord Rayleigh showed that its origin is the interference of t ...
Coherence - Studentportalen
... The phase order in the direction perpendicular to the beam is also important in many cases. The assumption in the previous section that we have a plane wave implicitly assumes perfect transverse coherence: the phase is the same everywhere on the wavefront. Perfect spatial coherence can be achieved i ...
... The phase order in the direction perpendicular to the beam is also important in many cases. The assumption in the previous section that we have a plane wave implicitly assumes perfect transverse coherence: the phase is the same everywhere on the wavefront. Perfect spatial coherence can be achieved i ...
WAVE PLATES
... Polarization Cleanup -Often an optical system will require several reflections from metal or dielectric mirrors. There is no change in the polarization state of the reflection if the beam is incident normally on the mirrors, or if the plane of polarization lies in or normal to the plane of incidence ...
... Polarization Cleanup -Often an optical system will require several reflections from metal or dielectric mirrors. There is no change in the polarization state of the reflection if the beam is incident normally on the mirrors, or if the plane of polarization lies in or normal to the plane of incidence ...
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.