Coaxial master-slave lens photographing apparatus
US5438386A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1993 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | Dec 30, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B7/28
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A coaxial master-slave lens system is provided. The coaxial master-slave lens system can be either fixed-focus type or zoom type, and can be equipped to any camera equipment. In such a coaxial master-slave lens system, a slave lens is provided as an additional attachment to the master lens. The slave lens is provided with a center hollowed portion for accommodating the master lens in such a manner that the slave optical axis is in coincidence with the master optical axis; the slave front lens plane is in coincidence with the master front lens plane; the slave rear lens plane is in coincidence with the master rear lens plane; the slave front focus point is in coincidence with the master front focus point; and the slave rear focus point is in coincidence with the master rear focus point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.