Image recording apparatus with a laser optical unit
US5212501A · kind A · utility
10Cited by
1References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1992 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Apr 29, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/124
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image recording apparatus wherein a laser diode which is disposed on a focal point of a micro Fresnel lens emits a laser beam and the laser beam is collimated by the Fresnel lens and scanned on a photosensitive drum by a polygonal mirror and an f.theta. optical system. A change in temperature of the laser diode does not result in such serious defocus as to cause practical problems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.