Lens-fitted photographic film package
US5084719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1990 |
| Grant date | Jan 28, 1992 |
| Priority date | — |
| Expiry date | Feb 7, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2219/045
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens-fitted photographic film package has a talking lens, a shutter and a film advancing mechanism incorporated therein and is loaded with film. The taking lens is disposed at the upper side of a casing of the film package and a first mirror is disposed behind the taking lens. A second mirror is disposed below the taking lens inside the casing. A Z-shaped exposure light path is thus formed by the first and second mirrors. On the inner wall surface of an exposure chamber for conducting the exposure light, there are formed a number of ridges extending in a direction parallel to the path of travel of the exposure light which reduce internal reflection within the exposure chamber. The mirrors are pressed by respective mirror hold-down members from the outside against respective mirror frames, and the mirror hold-down members are shaded with respective shading covers from ambient light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.