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A full-field optical coherence tomography (OCT) system has been developed for the purpose of performing nonscanning en face flow imaging. The light source is centered at 840 nm with a bandwidth of 50 nm resulting in an axial resolution of 8 µm in air. Microscope objectives with a numerical aperture of 0.1 were incorporated giving a transverse resolution of 5 µm. A magnification of 5.65 was measured, resulting in a field of view of 1260 x 945 µm. Pairs of interference fringe images are captured with opposing phase and a two-step phase image reconstruction method is applied to reconstruct each en face image. The OCT frame rate is 10 Hz. A two-dimensional cross-correlation technique is applied to pairs of consecutive en face images in order to distinguish dynamic from static light-scatterers. The feasibility of the method was examined by simulating blood flow by creating a phantom with 5% intralipid solution. In vivo imaging of a Xenopus laevis tadpole was also performed in order to investigate the feasibility of imaging the vascular system.We present for what we believe to be the first time, the application of correlation mapping optical coherence tomography to full-field OCT to provide in vivo functional imaging of blood vessels. [ABSTRACT FROM AUTHOR]

In this article, we report our study of a dual mode reflective cholesteric display, which works in the traditional bistable mode as well as in the new and fast monostable mode. Because both modes are compatible, they can be used according to the need for video or static images. The bistable mode operates between the reflecting planar state and non-reflecting focal conic state, both of which are stable at zero voltage. The bistable mode is suitable for displaying static images. In the monostable mode, it is operated on wrinkled cholesteric layers. It is fast and has low driving voltage, and can exhibit gray levels of reflectance determined by the applied voltage. The monostab[e mode is suitable to display video rate dynamic images. [ABSTRACT FROM AUTHOR]