AO for high peak power lasers
... Things that make AO for high-power lasers easier 1. Plenty of light (!) 2. Controlled environment (stable temperature, indoors, enclosed beams) 3. No need for an extended field of view (point focus only) 4. Only slow response needed (at present . . .) Things that make AO for high-power lasers harder ...
... Things that make AO for high-power lasers easier 1. Plenty of light (!) 2. Controlled environment (stable temperature, indoors, enclosed beams) 3. No need for an extended field of view (point focus only) 4. Only slow response needed (at present . . .) Things that make AO for high-power lasers harder ...
Rapid fabrication of 3D terahertz split ring resonator arrays by novel
... by the beam parameters (wavelength, numerical aperture (NA), point spread function (PSF), and focus) of the direct write process superimposed with the latent pattern created by the interference of the diffraction orders of the surface mask. Soft-lithography proximity field nanopatterning (PnP) has b ...
... by the beam parameters (wavelength, numerical aperture (NA), point spread function (PSF), and focus) of the direct write process superimposed with the latent pattern created by the interference of the diffraction orders of the surface mask. Soft-lithography proximity field nanopatterning (PnP) has b ...
Encircled energy factor in impulse response functions of
... dispersion factor in the diffraction pattern of circular apertures. LUNEBERG [12] proposed four apodisations problems and suggested a method to solve them by using the calculus of variations. The third Lunenburg problem is to find the optimum pupil function which gives maximum energy in a given area ...
... dispersion factor in the diffraction pattern of circular apertures. LUNEBERG [12] proposed four apodisations problems and suggested a method to solve them by using the calculus of variations. The third Lunenburg problem is to find the optimum pupil function which gives maximum energy in a given area ...
Microscope
... which has the same optical properties as glass, i.e. immersion oil. By collecting extra oblique light, the oil provides better resolution and a brighter image. ...
... which has the same optical properties as glass, i.e. immersion oil. By collecting extra oblique light, the oil provides better resolution and a brighter image. ...
Optical trapping using cascade conical refraction of light
... Optical traps are used in a wide variety of experimental setups from basic studies of atom dynamics to biological cell stretching studies. The early work owes much to the insight of Ashkin and his associates who led off this research area in 1986 [8, 9]. Traps are now routinely used to optically man ...
... Optical traps are used in a wide variety of experimental setups from basic studies of atom dynamics to biological cell stretching studies. The early work owes much to the insight of Ashkin and his associates who led off this research area in 1986 [8, 9]. Traps are now routinely used to optically man ...
Hollow Retroreflectors Promote Precision Optical Alignment
... When a beam enters a retroreflector, it creates an optical path with a total length defined by three bounces. This path depends on the location of the incoming beam with respect to the apex of the device. To better understand the process, it helps to examine an idealized situation with only two boun ...
... When a beam enters a retroreflector, it creates an optical path with a total length defined by three bounces. This path depends on the location of the incoming beam with respect to the apex of the device. To better understand the process, it helps to examine an idealized situation with only two boun ...
Microscopes - Photonics Research Group
... diffraction image (d 5 rAiry, Fig. 7b ), their sum (measured along the axis joining the two maxima) still contains a dip of 26.5 percent of the peak intensities that signals the twoness of the source points (the Rayleigh criterion). Once d becomes less than this distance, the two diffraction images ...
... diffraction image (d 5 rAiry, Fig. 7b ), their sum (measured along the axis joining the two maxima) still contains a dip of 26.5 percent of the peak intensities that signals the twoness of the source points (the Rayleigh criterion). Once d becomes less than this distance, the two diffraction images ...
Problem Set 9: SOLUTIONS
... in air and in vacuum. The optical length of the day is defined as the time interval between the instant when the top of the Sun is just visibly observed above the horizon, to the instant at which the top of the Sun just disappears below the horizon. The geometric length of the day is defined as the ...
... in air and in vacuum. The optical length of the day is defined as the time interval between the instant when the top of the Sun is just visibly observed above the horizon, to the instant at which the top of the Sun just disappears below the horizon. The geometric length of the day is defined as the ...
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.