Optical gratings: Nano-engineered lenses - MiNa
... using gratings defined by e-beam lithography on a 450-nm-thick layer of silicon on a silicon dioxide (quartz) substrate. First, the authors modelled the grating amplitude and phase reflectivity for different geometries. They then identified a range of parameters such that a phase shift of almost 2π ...
... using gratings defined by e-beam lithography on a 450-nm-thick layer of silicon on a silicon dioxide (quartz) substrate. First, the authors modelled the grating amplitude and phase reflectivity for different geometries. They then identified a range of parameters such that a phase shift of almost 2π ...
Quiz 9
... The radius of the hemisphere is 8.00 cm and the index of refraction is 1.50. A mirror is in contact with the hemisphere at the vertex and it is perpendicular to the principal axis. Determine the point at which the beam is focused. (Assume paraxial rays-that is, assume that all rays are located close ...
... The radius of the hemisphere is 8.00 cm and the index of refraction is 1.50. A mirror is in contact with the hemisphere at the vertex and it is perpendicular to the principal axis. Determine the point at which the beam is focused. (Assume paraxial rays-that is, assume that all rays are located close ...
Light-More-interference
... The basic idea is that they are around water sprays. This is where you get water drops floating in the air. The rainbow is the result of light undergoing dispersion in these tiny drops of water suspended in the atmosphere. The water drops act like prisms. Light enters near the top of the drop on one ...
... The basic idea is that they are around water sprays. This is where you get water drops floating in the air. The rainbow is the result of light undergoing dispersion in these tiny drops of water suspended in the atmosphere. The water drops act like prisms. Light enters near the top of the drop on one ...
LED Characteristic Measurement Methods
... temperature dependency. Then, the forward voltage (Vf2) is determined in the same way when the level of current that will actually be used is applied in set pulses or as a direct current. After set pulses have been applied, the forward voltage is obtained for the very small current (Vf3). The volta ...
... temperature dependency. Then, the forward voltage (Vf2) is determined in the same way when the level of current that will actually be used is applied in set pulses or as a direct current. After set pulses have been applied, the forward voltage is obtained for the very small current (Vf3). The volta ...
Lab (9): Spectroscopy
... • Infrared IR can be felt, but can’t be seen by naked eye. • Everything emits infrared light. Because of this, movement can be detected in the dark with infrared detectors. ...
... • Infrared IR can be felt, but can’t be seen by naked eye. • Everything emits infrared light. Because of this, movement can be detected in the dark with infrared detectors. ...
Basic Optics - Lynn`s Lecture Help
... To create a perfectly neutral- or gray- filter, energy from all three primary points in the spectrum must be absorbed to the same degree. When creating a filter by absorbing dye into resin, this process is further complicated by the inconsistent nature of the ...
... To create a perfectly neutral- or gray- filter, energy from all three primary points in the spectrum must be absorbed to the same degree. When creating a filter by absorbing dye into resin, this process is further complicated by the inconsistent nature of the ...
Optics6 - Cbsephysicstutorials
... Bending of waves by obstacles by a large angle is possible when the size of the obstacle is comparable to the wavelength of the waves. On the one hand, the wavelength of the light waves is too small in comparison to the size of the obstacle. Thus, the diffraction angle will be very small. Hence, the ...
... Bending of waves by obstacles by a large angle is possible when the size of the obstacle is comparable to the wavelength of the waves. On the one hand, the wavelength of the light waves is too small in comparison to the size of the obstacle. Thus, the diffraction angle will be very small. Hence, the ...
PDF
... beam splitter and the cylindrical lens. It should be noted that the cylindrical lens generates a focusing error signal using the astigmatic method. Figure 2 illustrates a schematic diagram of the laser beam diffraction in which the beam is diffracted by the grooves on the disc. The grooves are perio ...
... beam splitter and the cylindrical lens. It should be noted that the cylindrical lens generates a focusing error signal using the astigmatic method. Figure 2 illustrates a schematic diagram of the laser beam diffraction in which the beam is diffracted by the grooves on the disc. The grooves are perio ...
The Michelson Interferometer
... given wavelength, 0 546nm , incident on the beam-splitter. There is a cell of air placed along that arm of the interferometer which does not have the compensating plate. This cell is initially evacuated, and air is thereafter allowed to leak back into the cell. As the air leaks back in, the numbe ...
... given wavelength, 0 546nm , incident on the beam-splitter. There is a cell of air placed along that arm of the interferometer which does not have the compensating plate. This cell is initially evacuated, and air is thereafter allowed to leak back into the cell. As the air leaks back in, the numbe ...
Light 1 Mathematical representation of light (EM waves)
... wavelets, thus giving the locus of all points with the same phase. Such a construction is demonstrated in Fig. 3(b). The original wavefront, S-S, is traveling as indicated by the arrows. The shape after a time t can be obtained by constructing a number of circles centred on S-S with radius r = vt, w ...
... wavelets, thus giving the locus of all points with the same phase. Such a construction is demonstrated in Fig. 3(b). The original wavefront, S-S, is traveling as indicated by the arrows. The shape after a time t can be obtained by constructing a number of circles centred on S-S with radius r = vt, w ...
Fourier Transform Infrared (FTIR) Spectroscopy
... • Ground-based FTIR spectrometers also used for various applications ...
... • Ground-based FTIR spectrometers also used for various applications ...
Geometrical and diffraction optics
... The étendue is the maximum beam size the instrument can accept. Hence, the étendue is also called acceptance, throughput, or Au product. ...
... The étendue is the maximum beam size the instrument can accept. Hence, the étendue is also called acceptance, throughput, or Au product. ...
The Visual System Ophthalmic Lenses Basic Optical Formulas
... ...as the crystalline lens ages, it loses its flexibility- and its ability to adjust focus... this condition is called presbyopia and typically becomes noticeable around age 40 ...
... ...as the crystalline lens ages, it loses its flexibility- and its ability to adjust focus... this condition is called presbyopia and typically becomes noticeable around age 40 ...
Retroreflector
A retroreflector (sometimes called a retroflector or cataphote) is a device or surface that reflects light back to its source with a minimum of scattering. In a retroreflector an electromagnetic wavefront is reflected back along a vector that is parallel to but opposite in direction from the wave's source. The angle of incidence at which the device or surface reflects light in this way is greater than zero, unlike a planar mirror, which does this only if the mirror is exactly perpendicular to the wave front, having a zero angle of incidence.