Photographic film package
US4812866A · kind A · utility
23Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1988 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Feb 8, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic film package has a taking lens, an exposure member, and a rolled film, with their associated elements, contained in a light-tight film container as a unit. The taking lens consists of either an aspherical or a spherical single-element lens preferably made of plastic material and is designed to have a focal length f and a lens speed F defined by the following conditions: EQU F.gtoreq.f.sup.2 /150 EQU F.gtoreq.34.3-0.75f EQU F.ltoreq.16
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.