نتایج جستجو برای: geometrical optics

تعداد نتایج: 61630  

Journal: :Acta crystallographica. Section A, Foundations of crystallography 2006
Ya I Nesterets P Coan T E Gureyev A Bravin P Cloetens S W Wilkins

Using rigorous wave-optical formalism, a general expression is obtained for the image intensity distribution in combined analyser-based/propagation-based phase-contrast imaging. This expression takes into account partial coherence of the wave incident on the object as well as the finite resolution of the detector system. Using this general expression, two approaches based on the geometrical opt...

Journal: :Journal of the Illuminating Engineering Institute of Japan 1989

2006
Natalia Yaitskova Christophe Verinaud

The capability of the adaptive optics to correct for the segmentation error is analyzed in terms of the residual wavefront RMS and the power spectral density of the phase. The analytical model and the end-to-end simulation give qualitatively equal results justifying the significance of the geometrical matching between segmentation geometry and the actuators/subaperture distribution of the adapt...

2006
Jason Heikenfeld Andrew Steckl Neil Smith Don Abeysinghe Joseph Haus

A new class of liquid electro-optics based on electrowetting is able to replicate the high performance of solid geometrical optics. Scaled-down electrowetting optics can be arrayed in order to achieve a flat and large area form factor. Techniques for applying electrowetting devices to light valves and arrayed microprisms are reviewed. Electrowetting light valves (ELVs) reconfigure the geometry ...

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