Lens barrel
US5345283A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1992 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Dec 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/243
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A lens barrel according to the invention comprises a fixed tube fixedly mounted on a camera body, a drive tube fitted with respect to the fixed tube, a data projector fixedly mounted on the camera body for radiating a projecting luminous flux toward a film surface from respective outer peripheries of the fixed tube and the drive tube, to project photographing information, a through bore formed through a portion of the fixed tube through which the projecting luminous flux of the data projecting means passes, and a cut-out provided in a portion of the drive tube which is overlapped with the through bore in the fixed tube upon photographing. Upon non-photographing, a portion of the drive tube having no cut-out shields the through bore in the fixed tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.