نتایج جستجو برای: promoter optical characterization

تعداد نتایج: 715275  

Journal: :Proceedings of the National Academy of Sciences 1984

2001

NBS Special Publication 637, Optical Fiber Characterization [1], is a two-volume compilation of previously published NBS Technical Notes concerning the characterization of optical fibers used for telecommunications. The Technical Notes appeared in the late 1970s and early 1980s, which was the period of commercial infancy of optical telecommunications fiber. During that period, the commercially ...

Journal: :Proceedings of the National Academy of Sciences 1991

2017
Istvan Mohacsi Ismo Vartiainen Benedikt Rösner Manuel Guizar-Sicairos Vitaliy A. Guzenko Ian McNulty Robert Winarski Martin V. Holt Christian David

Multi-keV X-ray microscopy has been particularly successful in bridging the resolution gap between optical and electron microscopy. However, resolutions below 20 nm are still considered challenging, as high throughput direct imaging methods are limited by the availability of suitable optical elements. In order to bridge this gap, we present a new type of Fresnel zone plate lenses aimed at the s...

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