PPT-Laser Beams, Diffraction Gratings and Lenses

Zone plate Laserbeam diffraction A lens transforms a Fresnel diffraction problem to a Fraunhofer diffraction problem The lens as a Fourier transformer Diffraction gratings amp spectrometers. brPage 1br USING CDs AND DVDs AS DIFFRACTION GRATINGS brPage 2br Purpose of CDs and DVDs as Diffraction Gratings Activity brPage 3br CDs and DVDs as Diffraction Gratings brPage 4 Before the 1950s the prism was the pr imary dispersive element in spectrometer designs The use of an epoxy replication process in the 1950s led to the mass production of plane ruled reflective diffraction gratings New availability of ruled gratings 01 2011 4 SOL Lab reports are not turned in Labs from Week 2 your second lab are due last week Labs from Week 3 your third lab are due This week You will not be permitted to do labs next week if you have not submitted any reports by then No Lab Nov Textbook sections 28-4 – 28-6. Physics 1161:. . . Lecture 21. Recall. Interference . (at least 2 coherent waves). Constructive (full wavelength difference). Destructive (½ wavelength difference). LIGHT AMPLIFICATION by STIMULATED ELECTRON RADIATION. Question:. In movies, laser beams are always shown as bright pencils of light streaking through the air or space. If you were to look from the side at a beam from a powerful laser, would you be able to see that laser beam as it travels past you?. Laser Beam Containment. Lasers can produce intense, directed radiation that does not decrease with distance. . Lasers are classified by intensity and wavelength.. Effects from beam exposure. Ultraviolet – burns on cornea and lens. Martin Centurion. Department of Physics and Astronomy. University of Nebraska – Lincoln. 1. Outline. 2. Diffraction from aligned molecules:. 3D molecular images with sub-Angstrom resolution. Imaging of transient structures: Molecules in intense laser fields.. Using Diffraction Gratings. Forrest . Smith. 1. , . Weliton . Soares. 2. , . Samuel . Alves. 2. , . Itamar Vidal. 2. , . Marcos . Oria. 2. . 1. State University of New York at Geneseo, . 2. Federal University of Paraiba. Using Diffraction Gratings. Forrest . Smith. 1. , . Weliton . Soares. 2. , . Samuel . Alves. 2. , . Itamar Vidal. 2. , . Marcos . Oria. 2. . 1. State University of New York at Geneseo, . 2. Federal University of Paraiba. 28 March 2018. Perspectives on Laser H. -. Manipulation. Exciting times for Proton and Neutrino Beams. J-PARC. Nearly 500 kW T2K beam (& 1 MW capable neutron beam). Plans to go to 1.3 MW with upgrades. 4: Diffractive Optics. Prof. Juejun (JJ) Hu. hujuejun@udel.edu. Diffraction: scattering of light by periodic structures. Wikipedia: a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. Physics . 2212. Light. Light has Wave properties. Light can Diffract. Light can Interfere. Constructively. Destructively. Wave Fronts. Lines that are perpendicular to the motion of the wave, indicate the location of the crests in the waves that are traveling together.. Kirigami. Nanocomposite. L. . Xu. , X. Wang. , Y. . Kim, T. C. Shyu, J. . Lyu. , N.A. . Kotov, . Kirigami. . Nanocomposites as Wide-Angle Diffraction Gratings, . ACS Nano, . 2016. 10 (6), 6156–6162.. Introduction to transmission electron microscopy. Tutor: Peter Harris. The aims of this course are:. ● . to . describe the components of the transmission electron microscope (TEM). ● . to explain the origin of contrast in TEM images.