1 - Hodge Hill College
... Real and virtual images REAL images can be cast onto a screen, for example a projector image. They form where light rays cross after refraction by a lens. VIRTUAL images are formed from where light rays only appear to come from. A virtual image cannot be cast onto a screen, for example the image fo ...
... Real and virtual images REAL images can be cast onto a screen, for example a projector image. They form where light rays cross after refraction by a lens. VIRTUAL images are formed from where light rays only appear to come from. A virtual image cannot be cast onto a screen, for example the image fo ...
a 100-fold improvement in lithography resolution realized
... negative refraction of metamaterials. He proposed that perfect imaging could be achieved with ordinary positive refraction materials. In offering his proposal, Leonhardt theoretically analyzed the MFE and demonstrated that its focus is not restricted by the diffraction limit. If Leonhardt’s theory w ...
... negative refraction of metamaterials. He proposed that perfect imaging could be achieved with ordinary positive refraction materials. In offering his proposal, Leonhardt theoretically analyzed the MFE and demonstrated that its focus is not restricted by the diffraction limit. If Leonhardt’s theory w ...
A Fast Optical Propagation Technique for Modeling
... without large degrees of tilt and hard diffractive apertures, the resolution can be coarser. In systems with high tilts, the resolution is most sensitive. With a mesh spacing of λ/2, the angular spectrum decomposition will ensure plane waves propagating from aperture to observation plane in a comple ...
... without large degrees of tilt and hard diffractive apertures, the resolution can be coarser. In systems with high tilts, the resolution is most sensitive. With a mesh spacing of λ/2, the angular spectrum decomposition will ensure plane waves propagating from aperture to observation plane in a comple ...
Transmission of Light Through Small Elliptical Apertures (Part 1)
... and turn in space, but they cannot start extremely important for small apertures E-field creates B-field lines that surround the dipole or stop. in closed circular loops. (c) Static magnetic dipole as exemplified by the case of a normally The other two of Maxwell’s equam is a closed loop of electric ...
... and turn in space, but they cannot start extremely important for small apertures E-field creates B-field lines that surround the dipole or stop. in closed circular loops. (c) Static magnetic dipole as exemplified by the case of a normally The other two of Maxwell’s equam is a closed loop of electric ...
Tailored Complex Potentials and Friedel`s Law in Atom Optics
... overlapped at a beam splitter and enter the vacuum chamber collinearly (Fig. 3). The light crystal is set up by retroreflecting the central part (3.5 cm) of a collimated Gaussian laser beam (FWHM ca. 3.5 cm) at a mirror in the vacuum. At the metallic mirror surface the two light fields are in phase. ...
... overlapped at a beam splitter and enter the vacuum chamber collinearly (Fig. 3). The light crystal is set up by retroreflecting the central part (3.5 cm) of a collimated Gaussian laser beam (FWHM ca. 3.5 cm) at a mirror in the vacuum. At the metallic mirror surface the two light fields are in phase. ...
Two-state Optical Filter Based on Micromechanical
... reference. The device consists of fixed and movable diffractive sub-elements, micromachined in the device layer of a bonded silicon on insulator (BSOI) wafer. Switching between the two states of the filter is obtained by actuation of the movable subelements between idle and pull-in positions, which ...
... reference. The device consists of fixed and movable diffractive sub-elements, micromachined in the device layer of a bonded silicon on insulator (BSOI) wafer. Switching between the two states of the filter is obtained by actuation of the movable subelements between idle and pull-in positions, which ...
Conference title, upper and lower case, bolded, 18 - CHIC
... path is changed via the thermal index change [6,7]. In this approach, the large thermal time constants limit the speed at which the beam can be steered making them unsuitable for real-time and fast applications, such as projection, optical switches, or computing. Thermal crosstalk between adjacent p ...
... path is changed via the thermal index change [6,7]. In this approach, the large thermal time constants limit the speed at which the beam can be steered making them unsuitable for real-time and fast applications, such as projection, optical switches, or computing. Thermal crosstalk between adjacent p ...
Direct Patterning of Three-Dimensional Periodic
... ultraviolet (UV) frequencies.19 Our simulation results indicate that aluminum is the only common metal that can achieve such near-field interference pattern with strong contrast. The aperture width and periodicity in Figure 1 is 150 and 300 nm, respectively. It is also shown from our simulation that ...
... ultraviolet (UV) frequencies.19 Our simulation results indicate that aluminum is the only common metal that can achieve such near-field interference pattern with strong contrast. The aperture width and periodicity in Figure 1 is 150 and 300 nm, respectively. It is also shown from our simulation that ...
9. Microwaves MW
... The same basic set-up will be modified to serve three different experiments. In the first, absorption and reflection of microwaves from different samples will be investigated. In the second, the set-up is arranged to become a Michelson interferometer for the determination of the wavelength of the so ...
... The same basic set-up will be modified to serve three different experiments. In the first, absorption and reflection of microwaves from different samples will be investigated. In the second, the set-up is arranged to become a Michelson interferometer for the determination of the wavelength of the so ...
Airy disk
In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best focused spot of light that a perfect lens with a circular aperture can make, limited by the diffraction of light. The Airy disk is of importance in physics, optics, and astronomy.The diffraction pattern resulting from a uniformly-illuminated circular aperture has a bright region in the center, known as the Airy disk which together with the series of concentric bright rings around is called the Airy pattern. Both are named after George Biddell Airy. The disk and rings phenomenon had been known prior to Airy; John Herschel described the appearance of a bright star seen through a telescope under high magnification for an 1828 article on light for the Encyclopedia Metropolitana:...the star is then seen (in favourable circumstances of tranquil atmosphere, uniform temperature, &c.) as a perfectly round, well-defined planetary disc, surrounded by two, three, or more alternately dark and bright rings, which, if examined attentively, are seen to be slightly coloured at their borders. They succeed each other nearly at equal intervals round the central disc....However, Airy wrote the first full theoretical treatment explaining the phenomenon (his 1835 ""On the Diffraction of an Object-glass with Circular Aperture"").Mathematically, the diffraction pattern is characterized by the wavelength of light illuminating the circular aperture, and the aperture's size. The appearance of the diffraction pattern is additionally characterized by the sensitivity of the eye or other detector used to observe the pattern.The most important application of this concept is in cameras and telescopes. Owing to diffraction, the smallest point to which a lens or mirror can focus a beam of light is the size of the Airy disk. Even if one were able to make a perfect lens, there is still a limit to the resolution of an image created by this lens. An optical system in which the resolution is no longer limited by imperfections in the lenses but only by diffraction is said to be diffraction limited.