Optical system for amphibious camera and a moving device using the same
US5002372A · kind A · utility
8Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1988 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Jul 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system housed within a waterproof package includes, from front to rear, front lens and a rear group of lenses. For both of the front and rear surfaces of the front lens, proper numerical limits of the refractive power of the rear lens group are given to provide an amphibious camera which give a proper optical performance not only in the air but also under water without the necessity of focus adjustment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.