Imaging device for imaging a long object
US7532402B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Aug 10, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/451
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to an imaging device for imaging a long object. The imaging device includes at least one vertical lens device which concentrates light from the long object in a vertical direction, and a plurality of lens elements which are arranged in the form of a matrix in at least one lens line behind the vertical lens device, the lens elements respectively concentrating light from the long object in a horizontal direction. In order to achieve optimum light intensity in a cost-effective manner, each lens element comprises at least one horizontal collecting layer which is transparent to the light from the long object and comprises a refractive index having a gradient in the horizontal direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.