Results 241 to 250 of about 351,194 (295)

Simulated ocular biometry effects on add-power demand in multifocal intraocular lenses. [PDF]

J Cataract Refract Surg
Son HS, Auffarth GU, Baur I, Khoramnia R, Labuz G.   +4 more
europepmc   +1 more source

Pioneer of Biomedical Optics: Brian C. Wilson. [PDF]

J Biomed Opt
Pogue BW, Lilge L, Andersson-Engels S, Madsen SJ, Olivo MC, Vitkin A.   +5 more
europepmc   +1 more source

A versatile large-scale coherent Ising machine from microwave to visible and telecom wavelength bands. [PDF]

Light Sci Appl
Zhang H, Li J, Zhu H.
europepmc   +1 more source

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Focus Sensing Optical Profilometer

SPIE Proceedings, 1989
Abstract A high sensitivity focus sensing configuration is employed in the construction of an accurateoptical profilometer. The system is analyzed theoretically and experimental investigation indicates a sensitivity better than 3nm with a linear dynamic range of 50pm.
Andrei Brunfeld, Joseph Shamir, Gregory Toker   +2 more
openaire   +1 more source

Optical generation of focus wave modes

Journal of the Optical Society of America A, 2000
Localized wave solutions of free-space wave equation can be used in numerous applications where the localized transmission of electromagnetic energy is of major importance. However, an optical implementation of localized wave fields has not been accomplished yet, except for an ultrashort version of the Bessel beams or the so called Bessel-X pulses.
K, Reivelt, P, Saari
openaire   +2 more sources

Variable-focus liquid-filled optical lens

Applied Optics, 1993
A variable-focus liquid-filled optical lens consists of a solid plate, a ring spacer, and an elastic film; a liquid fills this lens-shaped container. One varies the focus by changing the liquid volume in the lens. The lens shape calculated theoretically is a paraboloid. However, it is approximately a sphere near the central area. The deformation of the
N, Sugiura, S, Morita
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Focus-wavelength encoded optical profilometer

Optics Communications, 1984
Abstract An optical profilometer is presented working on the principle of focus multiplexing by wavelength encoding. Decoding is performed by lateral dispersion. A detector array shows up a signal distribution whose features accurately monitor the surface position of the sample under test.
G Molesini, G Pedrini, P Poggi, F Quercioli   +3 more
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Telecentric optics for focus analysis

IEEE Transactions on Pattern Analysis and Machine Intelligence, 1997
Magnification variations due to changes in focus setting pose problems for vision techniques, such as, depth from focus and defocus. The magnification of a conventional lens can be made invariant to defocus by simply adding an aperture at an analytically derived location. The resulting optical configuration is called "telecentric".
M. Watanabe, S.K. Nayar
openaire   +1 more source