نتایج جستجو برای: optical resolving power

تعداد نتایج: 755599  

Journal: :Vision Research 2005
Gerald Westheimer

When the separation between the incoherent point sources is decreased, in the limit a decision whether the image distribution arises from one or two points or a short bar rests, in the absence of prior information, on the detection of an indentation. That, in essence, is the concept of resolution.

Journal: :international journal of nano dimension 0
h. rasooli saghai department of electrical engineering,college oftechnical& engineering, tabriz branch , islamic azad university , tabriz, iran. s.k. seyyedi sahbari department of electrical engineering,college oftechnical& engineering, tabriz branch , islamic azad university , tabriz, iran. s. zabihi agdam department of electrical engineering,college oftechnical& engineering, tabriz branch , islamic azad university , tabriz, iran.

in order to implement an integrated optical quantum circuit, designing waveguides based on the quantum box is of prime importance. to do this we have investigated optical waveguide both with and without optical pumping. the rate of absorption and emission using an array of algaas/gaas quantum box core/shell structure in the optical waveguide with various pumping intensities has computed. by con...

Journal: :Science 1975
M Ryle

It was not until 1958 that It could be shown with some certainty that most of the radio sources were powerful extragalactic objects, but the possi­ bilities were so exciting even in 1952 that my colleagues and I set about the task of designing instruments capable of extending the observation to weaker and weaker sources, and of exploring their internal structure. Early observations of radio sou...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

2013
Alessandro Esposito Marina Popleteeva Ashok R. Venkitaraman

Most recent advances in fluorescence microscopy have focused on achieving spatial resolutions below the diffraction limit. However, the inherent capability of fluorescence microscopy to non-invasively resolve different biochemical or physical environments in biological samples has not yet been formally described, because an adequate and general theoretical framework is lacking. Here, we develop...

Journal: :Nippon Jibiinkoka Gakkai Kaiho 1954

Journal: :Physical review letters 2014
Tomasz M Grzegorczyk Johann Rohner Jean-Marc Fournier

Trapping of mesoscopic particles by optical forces usually relies on the gradient force, whereby particles are attracted into optical wells formed by landscaping the intensity of an optical field. This is most often achieved by optical Gaussian beams, interference patterns, general phase contrast methods, or other mechanisms. Hence, although the simultaneous trapping of several hundreds of part...

Journal: :Symposium - International Astronomical Union 1959

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