Image reading device having a light waveguide means widened toward an end nearest to an image surface
US5198655A · kind A · utility
21Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jan 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/0314
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image reading device includes: a light emitting element for irradiating light on an image surface; a light receiving element for receiving image information in the form of reflected light from the image surface; and light waveguide passages provided between the light emitting element and the image surface and between the light receiving element and the image surface, respectively, and at least the light waveguide passage for the light emitting element is widened at an end surface thereof at the image surface to a width wider than at the end surface at the light emitting element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.