Panoramic lens
US5473474A · kind A · utility
93Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1993 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Jul 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B17/0808
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A panoramic imaging system for projecting a 360 degree cylindrical field of view onto a two-dimensional annular format has a panoramic imaging block with a concentric axis of symmetry, two refractive surfaces and two reflective surfaces. The first reflective surface is a concave conicoid of revolution with the conic constant in the range from -0.6 to +2.0. In an embodiment of the invention, the second refractive surface (the last in the path of rays) is flat, while the first reflective surface, the second reflective surface and the first refractive surface are all spherical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.