Projection device
US4631594A · kind A · utility
5Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1985 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Jun 11, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projecton device wherein a viscous body of transparent liquid is inserted between a CRT and an enlarging projection lens, which comprises: a ring-shaped spacer for determining the positional relation between the CRT and the lens unit provided therebetween; a ring-shaped packing provided between the CRT and the lens of the lens unit at the internal side of the spacer; a thin film section having elasticity provided as part of the packing; and a space provided between the spacer and the thin film section of the packing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.