Geometrical diffuse reflection is a common optical phenomenon that occurs when a reflecting surface has roughness of order of hundreds of micrometres. Light rays thus reflect uniformly in all directions with each ray obeying Snell's law. Of interest is knowing what happens when light reflects off surfaces with roughness of nanometres. Here, by introducing nanoscaled roughness on the hexagonal f...

Novel conical reflection of light by a thick three-layered metal-clad optical waveguide is observed. A symmetrical metal-cladding optical waveguide is used, which exhibits extraordinary conical reflection during free-space coupling of light to the waveguide. The phenomenon is attributed to the leakage of excited ultrahigh-order guided modes and their inter- and intramode coupling interaction.

A method is described for estimating the 3D reflection properties of painting materials such as oil paints and water paints. A gonio-spectral photometer is used for measuring light scattered from a variety of painting surfaces. The reflectance data are acquired at different incident and viewing geometries. The Torrance-Sparrow model is used for describing light reflection on the painting surfac...

Phase front modulation was previously used to refocus light after transmission through scattering media. This process has been adapted here to work in reflection. A liquid crystal spatial light modulator is used to conjugate the phase scattering properties of diffuse reflectors to produce a converging phase front just after reflection. The resultant focused spot had intensity enhancement values...

This paper proposes a gonio-spectral imaging system for measuring light reflection on an object surface by using two robot arms, a multi-band lighting system, and a monochrome digital camera. It allows four degrees of freedom in incident and viewing angles necessary for full parametrization of a reflection model function. Spectral images captured for various incident and viewing angles are warp...

We consider external reflection rainbow caustics due to the reflection of light from a pendant droplet where the light rays are at an arbitrary angle with respect to the horizontal. We compare this theory to observation of glare spots from pendant drops on grass; we also consider the potential application of this theory to the determination of liquid surface tension.

1 Manuscript received ????, ????? Revised version received ??????? Ling Li is with the Department of Computing at Curtin University of Technology, Australia. Carmen So-ling Ng is with the School of Computer Engineering, at Nanyang Technological University, Singapore. Contact: [email protected] Abstract: A key element to creating realistic images is the appearance of surfaces. In order to overc...

We imagine shining light on a lump of cold dense quark matter, in the CFL phase and therefore a transparent insulator. We calculate the angles of reflection and refraction, and the intensity of the reflected and refracted light. Although the only potentially observable context for this phenomenon (reflection of light from and refraction of light through an illuminated quark star) is unlikely to...

We imagine shining light on a lump of cold dense quark matter, in the color-flavor locked phase and therefore a transparent insulator. We calculate the angles of reflection and refraction, and the intensity of the reflected and refracted light. Although the only potentially observable context for this phenomenon (reflection of light from and refraction of light through an illuminated quark star...

The radiance structure inside the glass sphere (Figure 1) results from total internal reflection that allows light to reach points that are otherwise in shadow due to refraction perturbing light paths towards the center. The hard boundaries of these structures mark the narrow stripes where light travels around the sphere several times by total internal reflection, after it just managed to enter...