Dual image viewfinder for camera
US6650837B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 2002 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jun 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B13/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a viewfinder for a camera, a first front finder lens forms an image of a subject including a background area of the subject, a second front finder lens forms an image of the subject including a background area of the subject that is greater than the background area of the subject included in the image of the subject formed by the first front finder lens, and a rear finder lens permits simultaneous viewing of the images of the subject formed by the first and second finder lenses, whereby dual images of the subject including greater and lesser background areas of the subject can be simultaneously viewed when looking through the rear finder lens. When one sees in the viewfinder the difference between the greater and lesser background areas of the subject, he or she is alerted to take care in composing the picture to be taken.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.