Browse Prior Art Database

Method of Producing a Divergent Sheet of Light

IP.com Disclosure Number: IPCOM000062796D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Goodman, DS Tsai, RY [+details]

Abstract

This paper describes the production of narrow sheet of light with variable angular subtense and direction by reflecting a narrow sheet of light with fixed angular subtense and direction from either a reflective cylinder at variable radial position or from a reflective cone at variable radial and axial positions. Such sheets of light for robotic vision have previously been produced by expensive scanners having moving parts, or with cylindrical lenses. With cylindrical lenses, the range of divergence angles has practical limits, and lens transmittance considerably varies with angle.