Patent · US Expired

Optical system having a radial difference in refractive index

US4215914A · kind A · utility

11Cited by

2References

7Claims

0Family size

Assignee

Carl Zeiss Stiftung · DE

Inventors

Franz Muchel · Oberkochen, DE
Fritz Strahle · Heubach, DE

Key dates

Filing date	Dec 12, 1978
Grant date	Aug 5, 1980
Priority date	—
Expiry date	Dec 12, 1998

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/005
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An optical system in which at least one of the elements is made from so-called gradient glass having a radial difference in refractive index. The element having this radial difference may be either a lens with at least one curved surface, or a plane-parallel plate. The radial variation in refractive index varies in accordance with a formula which is given.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.