Methods for use in definition of object surfaces
AssigneeDynell Electronics Corporation
InventorsJoseph A. Ross, Howard K. Stern
Life of this patent
Estimating the term…
Abstract
In a method for defining the spatial location of points comprising an object surface, radiant energy is projected onto the object in successive steps with the energy projected in each step having a unique change in intensity with distance along an axis extending transversely of the projection field. The spatial locations of surface points are derived by comparison of reflected intensity information derived from records of the object so irradiated and predetermined patterns derived in accordance with the intensity changes with transverse distance in the respective energy projections.
Claims13
A method for use in defining the spatial location of object surface points comprising the steps of:
- (a) defining a projection field extending from a given location and including at least a part of said object surface including said points;
- (b) irradiating said object surface part by projecting patterned radiant energy into said projection field, such projected radiant energy conforming successively to a first pattern having a continuous characteristic variation along an axis transverse to said projection field, a second pattern having such continuous characteristic variation inverse to said first pattern along said axis, a third pattern having a continuous characteristic variation along said axis diverse from such continuous characteristic variation of said first pattern, and a fourth pattern having such continuous characteristic variation inverse to said third pattern along said axis;
- (c) making a separate record of said object surface part for such successive irradiation thereof;
- and
- (d) obtaining from intensity representations in said records and indicative of object surface points a ratio characteristic continuously indicative of object point location.
Dependencies are inferred from the claim text.