Color toner density sensor and image forming apparatus using the same
US5630195A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an image forming apparatus, a toner density sensor has a light emitting element from emitting light toward a toner pattern image formed on an image carrier, and a light receiving element for receiving the resulting reflection from the image. The light emitting element and light receiving element each has a directivity. The optical axes of the light emitting element and light receiving element intersect each other at a point exiting on or in the vicinity of the surface of the image carrier. The light emitting and light receiving elements are positioned such that a plane containing their optical axes is inclined a predetermined angle relative to a normal extending from the surface of the image carrier through the above point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.