Elliptically-shaped tool
US6741395B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2003 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jul 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Producing a tool for creating a mandrel for forming elliptically-shaped lens elements of a lenticular lens array comprises the steps of providing a base member having a radius b corresponding to a minor axis of an elliptical shape, the elliptical shape corresponding to a desired elliptical shape for each lens element of the lenticular lens array, and cutting the base member along a plane that forms an angle k with the minor axis of the desired elliptical shape. The elliptical shape comprises a major axis perpendicular to the minor axis, a vertex of the desired elliptical shape lies at a point a along the major axis, and the angle k is given by the formula cosine(k)=b/a.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.