Diffractive read-out of optical disks
... • using (high-frequency) track undulation for storing extra information, e.g. colour and/or sound channels Other research efforts have resulted in the introduction of the semiconductor laser (λ=820 nm) and the simplification of the optics, among others by introducing aspherical optics for the scanni ...
... • using (high-frequency) track undulation for storing extra information, e.g. colour and/or sound channels Other research efforts have resulted in the introduction of the semiconductor laser (λ=820 nm) and the simplification of the optics, among others by introducing aspherical optics for the scanni ...
Advanced optics tutorials
... The on-axis intensity can be very high due to the small area of the beam. Care should be taken in cutting off the beam with a very small aperture. The source distribution would no longer be Gaussian, and the far-field intensity distribution would develop zeros and other non-Gaussian features. Howeve ...
... The on-axis intensity can be very high due to the small area of the beam. Care should be taken in cutting off the beam with a very small aperture. The source distribution would no longer be Gaussian, and the far-field intensity distribution would develop zeros and other non-Gaussian features. Howeve ...
Inexpensive optical tweezers for undergraduate laboratories
... used to trap and manipulate dielectric spheres,1 viruses, bacteria,2 living cells,2,3 organelles,4–6 colloidal gold,7 and even DNA.8 Such traps, or optical tweezers, have measured elasticity, force, torsion, position, surface structure,9 and the interaction between particles.10 There are a wealth of ...
... used to trap and manipulate dielectric spheres,1 viruses, bacteria,2 living cells,2,3 organelles,4–6 colloidal gold,7 and even DNA.8 Such traps, or optical tweezers, have measured elasticity, force, torsion, position, surface structure,9 and the interaction between particles.10 There are a wealth of ...
11_abs_Fritz Riehle
... including the invention of laser and the creation of ultracold matter. Our state-of-the-art laser now maintains optical phase coherence over multiple seconds and provides this piercing resolution across the entire visible spectrum. The new capability in control of light has enabled us to create and ...
... including the invention of laser and the creation of ultracold matter. Our state-of-the-art laser now maintains optical phase coherence over multiple seconds and provides this piercing resolution across the entire visible spectrum. The new capability in control of light has enabled us to create and ...
Full text - UvA/FNWI - University of Amsterdam
... One-dimensional (1D) gases exhibit interesting phenomena that are not present in either 2D or 3D. Atom chips oer an attractive route to creating and manipulating such 1D gases. By employing speci cally designed wire patterns, the magnetic trapping potential of our chip features a strong harmonic co ...
... One-dimensional (1D) gases exhibit interesting phenomena that are not present in either 2D or 3D. Atom chips oer an attractive route to creating and manipulating such 1D gases. By employing speci cally designed wire patterns, the magnetic trapping potential of our chip features a strong harmonic co ...
Measurement of the separation between atoms beyond diffraction limit
... In the above two regimes, the situation slightly complicates if both atoms are located near-symmetrically around a node or an anti-node. In this case, Ω1 ≈ Ω2 , such that the two sideband peaks (or doublets) overlap. One way to resolve this is to adequately change the standing wave field phase. By t ...
... In the above two regimes, the situation slightly complicates if both atoms are located near-symmetrically around a node or an anti-node. In this case, Ω1 ≈ Ω2 , such that the two sideband peaks (or doublets) overlap. One way to resolve this is to adequately change the standing wave field phase. By t ...
Confocal Microscopy - Emory Physics
... the specimen, which is not at the focal point of the left-hand-side lens. (Note that the colors of the rays are purely for purposes of distinguishing the two sets—they do not represent different wavelengths of light.) Clearly, the image of the light blue point is not at the same location as the imag ...
... the specimen, which is not at the focal point of the left-hand-side lens. (Note that the colors of the rays are purely for purposes of distinguishing the two sets—they do not represent different wavelengths of light.) Clearly, the image of the light blue point is not at the same location as the imag ...
VLBA imaging of the Gamma-ray Emission Regions in
... that move down the jet & are seen in VLBA images ⇒ Sometimes upstream of 43 GHz core ⇒ Often in or downstream of 43 GHz core • Intra-day γ-ray/optical variability can occur in mm-wave regions ⇒ The highest-Γ jets are very narrow, < 1°, so at 10 pc from the central engine, jet < 6 lt-months across ⇒ ...
... that move down the jet & are seen in VLBA images ⇒ Sometimes upstream of 43 GHz core ⇒ Often in or downstream of 43 GHz core • Intra-day γ-ray/optical variability can occur in mm-wave regions ⇒ The highest-Γ jets are very narrow, < 1°, so at 10 pc from the central engine, jet < 6 lt-months across ⇒ ...
Quantitative evaluation of light microscopes based on image
... The characterization of the electro-optical system by means of measuring the OTF (λ) requires near-monochromatic light. For this purpose four narrow-bandpass interference filters are used, each with a bandwidth of 10 nm. The center wavelengths of these filters are 400 nm, 500 nm, 600 nm, and 700 nm ...
... The characterization of the electro-optical system by means of measuring the OTF (λ) requires near-monochromatic light. For this purpose four narrow-bandpass interference filters are used, each with a bandwidth of 10 nm. The center wavelengths of these filters are 400 nm, 500 nm, 600 nm, and 700 nm ...
CHAPTER 1 Wave Nature of Light
... • To obtain stimulated emission, the incoming photon should not be absorbed by another atom at E1. • We must have the majority of the atoms at the energy level E2. • When there are more atoms at E2 than at E1 we then have what is called a population inversion. • With only two levels we can never ach ...
... • To obtain stimulated emission, the incoming photon should not be absorbed by another atom at E1. • We must have the majority of the atoms at the energy level E2. • When there are more atoms at E2 than at E1 we then have what is called a population inversion. • With only two levels we can never ach ...
Investigations on the triboelectric electricity - DU E
... With this background, an ancient and well-known phenomenon, i.e. generation of electric charge by rubbing two polymers with different physical and chemical properties could be of great interest. This “contact electrification phenomenon” of energy generation is known as triboelectric effect in litera ...
... With this background, an ancient and well-known phenomenon, i.e. generation of electric charge by rubbing two polymers with different physical and chemical properties could be of great interest. This “contact electrification phenomenon” of energy generation is known as triboelectric effect in litera ...
Wave optics theory and 3-D deconvolution
... 21 October 2013 | Vol. 21, No. 21 | DOI:10.1364/OE.21.025418 | OPTICS EXPRESS 25418 ...
... 21 October 2013 | Vol. 21, No. 21 | DOI:10.1364/OE.21.025418 | OPTICS EXPRESS 25418 ...
LOC06f Diffraction of Light
... 4. Whenever the light strikes an object, there will be a reflection. At times the reflections can be almost as strong as the incident beam. Know where the reflections are and block them if necessary. 5. If the laser has a shutter in front of the beam, use it. When not taking data, place the shutter ...
... 4. Whenever the light strikes an object, there will be a reflection. At times the reflections can be almost as strong as the incident beam. Know where the reflections are and block them if necessary. 5. If the laser has a shutter in front of the beam, use it. When not taking data, place the shutter ...
Probing dipole-forbidden autoionizing states by isolated attosecond
... transition strengths between the quantum states. A large amount of data has been obtained and recorded by synchrotron radiations up to the x-ray regimes. Due to the limited brilliance of the light sources, or the limited intensity of the fields, normally only single-photon processes are considered i ...
... transition strengths between the quantum states. A large amount of data has been obtained and recorded by synchrotron radiations up to the x-ray regimes. Due to the limited brilliance of the light sources, or the limited intensity of the fields, normally only single-photon processes are considered i ...
