Retroreflective materials and optical imaging.
A retroreflective sheet returns each ray toward its source. If intercepted by a semireflecting plane mirror, the rays form a real image which lies as far behind the mirror as the source is in front. This principle can be used to make imaging systems with large apertures but without the usual aberrations.
Lens Arrays and Photography
AbstractApplications of lens arrays to the formation of photographic images are discussed. Examples of “integral” images are given, using microlens arrays manufactured by melting small islands of photoresist. Image formation with reflective arrays is also described, including a novel form of reflective array that introduces a constant angle of deviation, nominally independent of the angle of incidence.
A natural language discourse model to explain linear programming models and solutions
Abstract This paper presents a natural language (i.e., English) discourse model to explain a linear programming model and, possibly, its computed solution (which need not be optimal). Drawing from earlier syntactic translations, a semantic model is presented, based on economic input-output relations commonly found in large-scale linear programs. These are then shown how to form rule-driven explanations, which comprises a fundamental component of an intelligent mathematical programming system.