Apparatus and method for forming a layered diffraction grating and a printed article including a layered diffraction grating
AssigneeXerox Corporation
InventorEdward N. Chapman
Life of this patent
Estimating the term…
Abstract
A method of forming an article which includes a diffraction grating, an article, and an apparatus for forming the article by printing are described. The method includes forming a periodic structure by printing a first set of parallel lines on a first side of a transparent substrate with a marking material and printing a second set of parallel lines on a second side of the transparent substrate with a marking material, the first and second sets of lines, in combination, defining a grating having a frequency and a spacing between lines which causes incident light to be diffracted into a plurality of beams travelling in different directions.
Claims22
A method of forming an article comprising a diffraction grating comprising:
- providing a transparent substrate having a thickness of at least 0.02 mm;
- forming a periodic structure by printing a first set of parallel lines on a first side of the transparent substrate with a marking material and printing a second set of parallel lines on a second side of the transparent substrate with a marking material, alternating ones of the parallel lines on the first and second sides, in combination, defining a grating having a frequency and a spacing between lines which causes incident light to be diffracted into a plurality of beams travelling in different directions.
A method of forming an article comprising a diffraction grating comprising:
- storing a first vector pattern cell in memory;
- generating a first array comprising multiple instances of the first vector pattern cell in memory;
- generating a second array comprising one of:
- applying a correction matrix or affine transform to the first vector pattern cell to generate a second vector pattern cell and generating the second array comprising multiple instances of the second vector pattern cell in memory, and
- applying a correction matrix or affine transform to the first array to generate the second array;
- forming a periodic structure by printing a first set of parallel lines on a first side of a transparent substrate with a marking material in accordance with the first array;
- and
- printing a second set of parallel lines on a second side of the transparent substrate with a marking material, in accordance with the second array, the first and second sets of lines, in combination, defining a grating having a frequency and a spacing between lines which causes incident light to be diffracted into a plurality of beams travelling in different directions.
Dependencies are inferred from the claim text.