Prism for optical system
US5978144A · kind A · utility
7Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Nov 4, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A prismatic optical device employs an improved prismatic image erecting system with curved refracting surfaces. The optical device can be any one of a wide variety of known devices such as telescopes and binoculars which include an objective, an image erecting system and an ocular. The erecting prism of the optical system is preferably an integral prism formed of optical quality plastic and may comprise a Porro erecting prism system or an image erecting system employing pentangular or roof prisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.