Patent · US Expired

Microscope objective

US4009945A · kind A · utility

7Cited by

3References

2Claims

0Family size

Inventor

Walter Klein · Katzwinkel, DE

Key dates

Filing date	Sep 1, 1967
Grant date	Mar 1, 1977
Priority date	—
Expiry date	Sep 1, 1987

Classification

Technology area (CPC G)Physics
CPC primaryG02B21/02
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A microscope objective of the strong, dry type wherein the lenses at the object end of the system are particularly small and wherein the curvature of the field is corrected and the image field is flattened by a front lens consisting of a thick meniscus lens is improved to overcome manufacturing and correction difficulties by providing lenses to first widen and then narrow the path of the bundle of rays from the thick meniscus lens and simultaneously to correct aberrations, particularly for large view fields. The objective of this invention is designed for use with medium and high apertures.

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