Precision control of web material having micro-replicated lens array
US9977154B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2011 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Apr 9, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2059/023
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A manufacturing system includes a sensing system that provides high-resolution feedback for web guiding and tension control. The system may be especially useful for web material that is manufactured to include micro-replicated structures with micron size scale. A micro-replication station forms a pattern of micro-replicated lenses on a web material. The sensing system illuminates a measurement area on the web material and detects an angular distribution of light exiting a set of the micro-replicated lenses within the first measurement area. A control system that adjusts at least one process control parameter of the transport system based on the detected angular distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.