This paper describes a technology for a compact spectrometer based on a 2D piezoelectric mirror and/or grating array. The piezoelectric mirror/grating array is composed of angularly movable, 2-D array of micromirrors/microgratings that is supported on piezoelectric cantilevers, and can be driven piezoelectrically with controllable tilt angle in both upward and downward directions. A large refle...

1. Introduction. The methodology and results described in this paper relate to research for the Alter Ego project (Wright et al., 2005), an art/science collaboration that led to a publicly accessible interactive installation which has been shown in museums and galleries nationally. In essence, a 3D image of the autonomous 'alter ego' of the user is created as a mirror reflection in real time. I...

When artists depict a mirror in a painting, it necessarily lacks the most obvious property of a mirror: as we move around the painting of the mirror, the reflections we see in it do not change. And yet representations of mirrors and other reflecting surfaces can be quite convincing in paintings. Here, we will examine the rules of reflection, the many ways that painters can break those rules wit...

Unlike a vertical-cavity surface-emitting laser (VCSEL), which comprises two highly reflecting distributed Bragg reflectors (DBRs), the extended cavity in VECSELs employs a third mirror. The fabrication of such a device requires a long process chain, including the patterning of the VCSEL structures, definition of the extended optical resonator, mirror coating and die bonding. While VCSELs have ...

The mirror neuron system may help us understand how others act and what they do. A recent study has shown that consciously reflecting on their intentions additionally recruits mentalizing areas.

Scallops possess a visual system comprising up to 200 eyes, each containing a concave mirror rather than a lens to focus light. The hierarchical organization of the multilayered mirror is controlled for image formation, from the component guanine crystals at the nanoscale to the complex three-dimensional morphology at the millimeter level. The layered structure of the mirror is tuned to reflect...