Lens system for microfiche duplicators
US4367518A · kind A · utility
4Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 6, 1978 |
| Grant date | Jan 4, 1983 |
| Priority date | — |
| Expiry date | Apr 6, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In an apparatus capable of duplicating jacketed and unjacketed microfiche, a bank of clear cylindrical lenses is provided, each lens being divided into segments by a series of substantially opaque baffles. The lenses are used with a corresponding bank of aperture lamps, and are disposed between the lamps and microfiche to provide relatively uniform, collimated light upon an image plane, the side of the lenses closest to the microfiche being flattened, and the baffles having an index of refraction lower than that of the clear segments of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.