The ins and outs of conical refraction
... imply that the vectors D and E must point in the same direction. Except for cubic crystals and other isotropic materials, they do not. So to find acceptable light waves for any direction of k, we must find directions of D (at right angles to k) such that E lies in the required plane. In a crystal of ...
... imply that the vectors D and E must point in the same direction. Except for cubic crystals and other isotropic materials, they do not. So to find acceptable light waves for any direction of k, we must find directions of D (at right angles to k) such that E lies in the required plane. In a crystal of ...
Theory of Optical Tweezers
... the Mie coefficients al , bl , that are functions of the size parameter β and the relative refractive index n = n2 /n1 . By substitution into (2), we obtain the total scattered field Es (r). The trapping force is found by replacing the total field E = E0 + Es (likewise for B) into the Maxwell stress ...
... the Mie coefficients al , bl , that are functions of the size parameter β and the relative refractive index n = n2 /n1 . By substitution into (2), we obtain the total scattered field Es (r). The trapping force is found by replacing the total field E = E0 + Es (likewise for B) into the Maxwell stress ...
PowerPoint - ECSE - Rensselaer Polytechnic Institute
... Raman amplification uses a non-linear phenomenon called SRS. Multimode fibers have core diameters of 8-10 um Single mode means that exactly one wavelength passes through the fiber The single mode energy is present in both the core and cladding (latter known as evanescent wave) Th ...
... Raman amplification uses a non-linear phenomenon called SRS. Multimode fibers have core diameters of 8-10 um Single mode means that exactly one wavelength passes through the fiber The single mode energy is present in both the core and cladding (latter known as evanescent wave) Th ...
Wide-field extended-resolution fluorescence
... The concept of a perfect lens realized with negative refractive index materials was recently proposed [1]. Surface plasmon resonance (SPR) – resonant energy transfer from incident photons to electron density oscillations along a metal-dielectric interface – helps to enhance weak evanescent waves, w ...
... The concept of a perfect lens realized with negative refractive index materials was recently proposed [1]. Surface plasmon resonance (SPR) – resonant energy transfer from incident photons to electron density oscillations along a metal-dielectric interface – helps to enhance weak evanescent waves, w ...
Supernormal vision and high-resolution retinal imaging through
... century,4 current ophthalmic lenses still leave uncorrected additional aberrations such as spherical aberration, coma, and a host of irregular aberrations. The pattern of aberrations left uncorrected by spectacles varies across individuals,5–9 and their combined effect reduces optical quality so tha ...
... century,4 current ophthalmic lenses still leave uncorrected additional aberrations such as spherical aberration, coma, and a host of irregular aberrations. The pattern of aberrations left uncorrected by spectacles varies across individuals,5–9 and their combined effect reduces optical quality so tha ...
Generalized Jinc functions and their application to focusing and
... radial coordinate. However, this kind of simple field distribution appears only at the geometrical focal plane for the case of converging spherical-wave illumination. And for the case of plane-wave illumination, it is also valid only for those transverse planes that are far from the aperture plane. ...
... radial coordinate. However, this kind of simple field distribution appears only at the geometrical focal plane for the case of converging spherical-wave illumination. And for the case of plane-wave illumination, it is also valid only for those transverse planes that are far from the aperture plane. ...
Printable T
... The object stands in front of a convex mirror. Consider first the P-ray: it leaves the top of the object as a parallel ray, and when it hits the convex mirror it is reflected. The reflected ray passes through the focal point of the spherical mirror. Even though the ray would be reflected up and away ...
... The object stands in front of a convex mirror. Consider first the P-ray: it leaves the top of the object as a parallel ray, and when it hits the convex mirror it is reflected. The reflected ray passes through the focal point of the spherical mirror. Even though the ray would be reflected up and away ...
A spatial light modulator for ion trapping experiments
... the bit. It can take either of two states, usually denoted as 0 and 1. The actual implementation of a bit is not attached to a single physical quantity and can be achieved in many ways, but it is very often connected to electronic quantities such as current and voltage, e.g a current flowing through ...
... the bit. It can take either of two states, usually denoted as 0 and 1. The actual implementation of a bit is not attached to a single physical quantity and can be achieved in many ways, but it is very often connected to electronic quantities such as current and voltage, e.g a current flowing through ...
Newtons Ring
... In the Newton’s ring experiment, how does interference occur? Where have the fringes formed? Why are the fringes circular? Are all rings equispaced? Why is an extended source used in this experiment? What will happen if a point source or an illuminated slit is used instead of the extended source? In ...
... In the Newton’s ring experiment, how does interference occur? Where have the fringes formed? Why are the fringes circular? Are all rings equispaced? Why is an extended source used in this experiment? What will happen if a point source or an illuminated slit is used instead of the extended source? In ...
X-ray Optics - Studentportalen
... scattered only if the interference condition is fulfilled. At other angles (or wavelengths) ‘nothing happens’, except transmission and absorption. In the reflection grating the angles are defined relative to the surface normal, and there is always a direction where a wavelength can be diffracted. Fo ...
... scattered only if the interference condition is fulfilled. At other angles (or wavelengths) ‘nothing happens’, except transmission and absorption. In the reflection grating the angles are defined relative to the surface normal, and there is always a direction where a wavelength can be diffracted. Fo ...
Orientation of perylene derivatives on semiconductor surfaces
... a backscattering geometry with a spectral resolution of 2.5 cm1. The incident beam having a power of 30 mW was focused onto a spot of 300 mm in diameter. For comparison Raman measurements were taken from a crystal obtained by sublimation using an Olympus microscope with 100 magnification objectiv ...
... a backscattering geometry with a spectral resolution of 2.5 cm1. The incident beam having a power of 30 mW was focused onto a spot of 300 mm in diameter. For comparison Raman measurements were taken from a crystal obtained by sublimation using an Olympus microscope with 100 magnification objectiv ...
Optical aberration
.svg?width=300)
An optical aberration is a departure of the performance of an optical system from the predictions of paraxial optics. In an imaging system, it occurs when light from one point of an object does not converge into (or does not diverge from) a single point after transmission through the system. Aberrations occur because the simple paraxial theory is not a completely accurate model of the effect of an optical system on light, rather than due to flaws in the optical elements.Aberration leads to blurring of the image produced by an image-forming optical system. Makers of optical instruments need to correct optical systems to compensate for aberration.The articles on reflection, refraction and caustics discuss the general features of reflected and refracted rays.