Optical systems, telescopes and binoculars
US5652679A · kind A · utility
44Cited by
11References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1993 |
| Grant date | Jul 29, 1997 |
| Priority date | — |
| Expiry date | Mar 26, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system including at least one lens and erecting mirrors designed and arranged to give an inherent aperture and field greater in one direction than another direction. By using a low power eyepiece lens it is possible to arrange for a user's eye or eyes to be further behind the eyepiece lens so that the user can wear normal spectacles to correct for eye defects. When a pair of the optical systems is used in a pair of binoculars, it is possible for the exit pupils to be in a form of horizontal slots so the systems do not have to have adjustable spacing to allow for a particular user's eye separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.