Image recorder having diagnostic capability
US6650354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/465
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is provided an image recorder which allows easy malfunction detection in a light modulator and can previously prevent the occurrence of fogging of a photosensitive material, a fire, or the like. A recording head (12) in the image recorder includes a laser light source (21) for emitting a laser beam, a light modulator (24) for modulating a laser beam, an illumination optical system (23) for irradiating the light modulator (24) with a laser beam emitted from the laser light source (21), an imaging optical system (26) for focusing signal light from the light modulator (24) onto a recording medium (11) for image formation, a photodetector (27) for detecting non-signal light from the light modulator (24), a controller (28) for detecting a malfunction in the light modulator (24) on the basis of output from the photodetector (27), and a light shielding mechanism (22) for, when the controller (28) detects a malfunction in the light modulator (24), cutting off an optical path between the laser light source (21) and the light modulator (24).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.