This paper contains examples of closed aspherical manifolds obtained as a by-product of recent work by the author [Bel] on the relative strict hyperbolization of polyhedra. The following is proved. (I) Any closed aspherical triangulated n-manifold M with hyperbolic fundamental group is a retract of a closed aspherical triangulated (n+ 1)manifold N with hyperbolic fundamental group. (II) If B1, ...

Reflective optics is one of the most useful techniques for focusing a neutron beam with a wide wavelength range since there is no chromatic aberration. Neutrons can be focused within a small area of less than 1 mm 2 by high-performance aspherical supermirrors with high figure accuracy and a low smooth substrate surface and a multilayer interface. Increasing the mirror size is essential for incr...

Introduction A growing demand on machining high precision aspherical and free-form optics derives from the continuous development of computer-assisted calculation and simulation methods and therefore improved possibilities of integrating numerous optical functions within one and the same lens or mirror. Applications include illustration as well as sophisticated illumination optics. State-of-the...

An axiparabola is a reflective aspherical optics that focuses light beam into an extended focal line. The intensity and group velocity profiles along the focus are adjustable through proper design. on-axis can be controlled, for instance, by adding spatio-temporal couplings via chromatic on incoming beam. Therefore energy deposition axis either subluminal or superluminal as required in various ...

Optofluidics is a rapidly growing versatile branch of adaptive optics including a wide variety of applications such as tunable beam shaping tools, mirrors, apertures, and lenses. In this review, we focus on recent developments in optofluidic lenses, which arguably forms the most important part of optofluidics devices. We report first on a number of general characteristics and characterization m...

High-resolution imaging and beam steering using 3 microlens arrays (MLA) is demonstrated. Small lateral displacement of one microlens array is sufficient for large angle beam steering. A prescan lens is added to the system to overcome the discrete addressing problem associated with microlens scanning systems. A hybrid method that uses both geometrical ray tracing optimization and physical optic...

A lens system for shaping a laser beam profile has been designed, built, and tested. It consists of two plano-aspherical lenses which convert a Gaussian input beam into a uniform irradiance output beam. The optical design is based on solving differential equations expressing conservation of energy and constant optical path length condition as the beam passes through the system. Experimental res...

1.Introduction Recently, various measurements using neutron beam have attracted much attention because of the ability to identify hydrogen atoms and water molecules exactly, sensitivity to magnetism and hard penetrating power. And high-intensity proton accelerator facilities are constructed for neutron research such as J-PARC in Japan, ISIS-TS2 in UK and SNS in USA. However, neutron intensity i...

Aspherical and freeform lenses allow for compact optical systems have therefore gained high interest in optics. The interferometric measurement of these forms is a challenge, which the tilted-wave interferometer (TWI) has been developed. To evaluate uncertainty TWI, both static dynamic influence parameters to be investigated. In this work, we focus on influences data interferometer. end, indivi...