Self-cleaning apparatus for removal of foreign substances from a plate-like device
US5170288A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Sep 26, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An arrangement is provided for removing foreign substances from a mirror. A vibrator for vibrating the mirror includes a vibration controlling unit for supplying power to the vibrator. As the vibration controlling unit is located close to the vibrator, the length of the conductive wire which transmits the power can be minimized so as to reduce radio noise. The heat generated by the vibration control unit can be radiated sufficiently through a metallic case member and the vibration controlling unit can be disposed in the closed, small space between the mirror and the housing. Therefore, the size of the housing can be reduced so as to minimize the space which surrounds the vibration control unit. Further, the vibration control unit can be protected from contamination due to the closed case member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.