Nano Focus: Bottlebrush copolymers expand size range of nanopores

Nano-Devices Using Block-Copolymers

Segmented helical structures formed by ABC star copolymers in nanopores.

Self-assembly of ABC star triblock copolymers confined in cylindrical nanopores is studied using self-consistent mean-field theory. With an ABC terpolymer forming hexagonally-arranged cylinders, segmented into alternative B and C domains, in the bulk, we observe the formation in the nanopore of a segmented single circular and non-circular cylinder, a segmented single-helix, and a segmented doub...

Range from focus-error

We derive theoretically and demonstrate experimentally an approach to range-from-focus with an important improvement over all previous methods. Previous methods rely on subjective measures of sharpness to focus a selected locale of the image. Our method uses measured physical features of the optical signal to generate an objective focus-error distance map. To compute range-from-focus-error dist...

Range from focus

One method for improving the vision system of a robot is to allow the robot to automatically focus its cameras and to use focus as a depth cue. In this paper, the problem of automatic focusing is reduced, by a theoretical analysis of defocus as a wave aberration which attenuates high spatialfrequencies, to the problem of measuring the high spatialfrequency content of an image. The problem of re...

Focus Range Sensors

Structures of dynamic scenes can only be recovered using a real-time range sensor. Focus analysis offers a direct solution to fast and dense range estimation. It is computational efficient as it circumvents the correspondence problem faced by stereo and feature tracking in structure from motion. However, accurate depth estimation requires theoretical and practical solutions to a variety of prob...