Patent · US Active

Objective lens

US7446944B2 · kind B2 · utility

3Cited by

5References

16Claims

0Family size

Assignee

Carl Zeiss AG · DE

Inventors

Juergen Klein · Mainz, DE
Juergen Noffke · Aalen, DE
Dietmar Gaengler · Langenau, DE

Key dates

Filing date	Mar 6, 2007
Grant date	Nov 4, 2008
Priority date	—
Expiry date	Mar 6, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/04
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An objective lens comprises a housing, an iris diaphragm and a plurality of lens groups. For focusing the objective lens while minimizing the variation of the image angle at least two lens groups are adapted to be moved relative to the housing. The one lens group is arranged in front of the iris diaphragm. The other lens group is arranged at least partially behind the iris diaphragm.

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