Discrete pattern
US6754419B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Aug 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0086
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discrete pattern, formed by dots discretely arranged in two dimensions, is provided wherein the dots included in a rectangular area having a longitudinal length of Lx and a transverse length of Ly satisfy expression (1),D≦0.13N−1 15  (1) (in expression (1), N denotes the number of dots included in a predetermined area, and D is obtained by expression (2), wherein A(x,y) defines the number of dots, of a total of N dots, included in a rectangular area for which a line segment extended from reference coordinates (0,0) to an arbitrary coordinate point (x,y) is a diagonal line), [Ex. 2]and wherein S1 that is obtained by expression (3) [Ex. 3]is equal to or smaller than 0.7. (In expression (3), g1 is obtained by dividing the average radial distribution function g(r) of each dot in the area by an integration value of g(r) over a range of from r1 to r2, and gav is the average value of g1 within the range of from r1 to r2. When the dots are arranged in a square lattice to satisfy a given filling rate, r1 and r2 are chosen as one and four times the value of the lattice constant Dr respectively. The dot filling rate is a value obtained by multiplying the square of the m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.