Three dimensional imaging using a refractive optic design
AssigneeDynamic Measurement and Inspection,LLC
InventorKevin G. Harding
Life of this patent
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Abstract
A method and apparatus for gathering full-field three dimensional data for a surface by directing light through a master grating and a projection lens onto a surface, viewing the light from the surface though an imaging lens, a plurality of splitting lenses, and a submaster grating, creating a plurality of moire fringes, and examining said plurality of moire fringe patterns to determine full-field three dimensional data.
Claims20
A method for gathering full-field three dimensional data for a surface comprising:
- generating light;
- directing said light through a master grating and a projection lens onto said surface;
- viewing said light from said surface though an imaging lens, a plurality of splitting lenses, and a submaster grating, wherein a plurality of moire fringe patterns are generated and create a sinusoidal light modulation;
- examining said plurality of moire fringe patterns to determine said full-field three dimensional data.
A method of determining the topography of a surface comprising:
- generating a plurality of interference patterns on said surface;
- phase shifting said plurality of interference patterns;
- viewing said plurality of interference patterns simultaneously;
- and
- examining said viewed plurality of interference patterns to determine said surface topography.
An apparatus for determining the topography of a surface comprising:
- a light source generating a light beam;
- a master grating optically coupled to said light source;
- a projection lens optically coupled to said master grating, wherein said projection lens directs said light beam at a surface;
- an imaging lens optically coupled to said surface;
- a plurality of splitting lenses optically coupled to said imaging lens;
- a submaster grating optically coupled to said plurality of splitting lenses;
- and
- a viewing system which views said surface through said imaging lens, said plurality of splitting lenses, and said submaster grating, wherein a plurality of phase shifted diffraction patterns are viewed.
Dependencies are inferred from the claim text.