Non-orthogonal cube corner elements and arrays thereof made by end milling
US11253933B2 · kind B2 · utility
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67References
10Claims
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Key dates
| Filing date | Feb 5, 2018 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Feb 5, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0091
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A new technique for making cube corner elements that involves end milling is used in the fabrication of cube corner elements having non-orthogonal dihedral angles and dihedral angle errors, and arrays of such cube corner elements. A given optical face of a cube corner element may be a compound face with two constituent faces. In some cases, the constituent faces may be parallel and coplanar such that a given dihedral angle error pertains to the entire optical face, while in other cases, the two constituent faces may not be parallel, and may be associated with different dihedral angle errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.