Polycapillary optics can be designed for a wide variety of x-ray applications. They have been used as focusing collectors for x-ray astronomy, to produce large-area collimated beams for wafer analysis and to provide small focused beams for protein crystallography with low-power x-ray sources. They are also being developed for a number of medical applications, including the removal of Compton sc...

A. F. Stalder, Z. Liu, R. Lorenz, J. Hennig, J. G. Korvink, and M. Markl Dept. of Radiology, Xuanwu Hospital, Capital Medical University, Beijing, China, People's Republic of, Dept. of Diagnostic Radiology Medical Physics, University Hospital, Freiburg, Germany, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Science, Changchun, China, People's Republic of,...

With increasing use of infrared imaging in medical diagnostics, military and civilian surveillance, navigation autonomous vehicles, there is a need for low-cost alternatives to traditional materials used optics such as germanium. Sulfur-rich copolymers hold promise, they are made from feedstocks have high refractive index. In this report, cyclopentadiene copolymerized with sulfur provide plasti...

a comprehensive study on the structural, electronic and nonlinear optical (nlo) properties of alumina nanostructures (al2o3)n with n = 2-5 belonging to the groups iii and vi dopants carried out by density functional theory. the nbo charges exhibit dopant atoms caused to the increasing charge transfer and introduces acceptor-donor model for nlo response of alumina nanostructures. under the influ...

A daptive optics imaging systems use active optical elements to compensate for aberrations in the optical path between the camera and the object being imaged. In 1953, Babcock first suggested the use of adaptive optics to improve ground-based astronomy, where the rapidly changing atmosphere can significantly degrade the image quality of a ground-based telescope system. 1 Of course the use of ad...

35.1 INTRODUCTION X rays have a century-long history of medical and technological application. Optics have come to play an important role in many capacities. This chapter examines how various X-ray optics enable typical applications, and the factors that influence optics choices. It is not feasible in this chapter to discuss every possible utilization of X-ray optics. Rather, a representative s...

We use an ultrafast electro-optic dual comb interferometer to perform single-point vibrometry on the submillisecond time scale. As an example, we resolve the vibration of an ultrasound speaker driven at 50 kHz, achieving a sub-nanometer axial resolution through a measurement of the optical phase carrier. OCIS codes: (320.7100) Ultrafast measurements; (120.6200); Spectrometers and spectroscopic ...

Ultrafast imaging has been a key enabler to many novel imaging modalities, including looking behind corners and imaging behind scattering layers. With picosecond time resolution and unconventional sensing geometries, ultrafast imaging can fundamentally impact sensing capabilities in industrial and biomedical applications. This paper reviews the fundamentals, recent advances, and the future pros...

In this paper, we study approximate cloaking of active devices for the Helmholtz equation in the whole space of dimension 2 or 3 for the scheme introduced by Kohn, Shen, Vogelius, and Weinstein in [11]. More precisely, we assess the degree of invisibility, determine the limit of the field inside the cloaked and cloaking regions, and show that the scheme is unstable with respect to the material ...