Microscope objective with correcting means
AssigneeOlympus Optical Co., Ltd.
InventorTsutomu Tojyo
Life of this patent
Estimating the term…
Abstract
A microscope objective with correcting means comprising a front lens group arranged on the object side of a pre-determined airspace and rear lens group arranged on the image side of said airspace and arranged to correct aberrations, which will be caused by difference in thickness of the cover glass, by varying said airspace moving the rear lens group in respect to the front lens group so that a favourable image can be obtained for observation.
Claims6
A microscope objective with correcting means comprising a front lens group arranged on the object side of a pre-determined airspace and a rear lens group arranged on the image side of said airspace, said microscope objective with correcting means being arranged to vary said pre-determined airspace by moving said rear lens group in respect to said front lens group in order to correct aberrations to be caused when thickness of a cover glass used for observation by said microscope objective is different from the corresponding standard thickness of the cover glass and satisfying the following condition when reference symbol f.sub.I represents the focal length of said front lens group and reference symbol f.sub.II represents the focal length of said rear lens group:
- .vertline.f.sub.II /f.sub.I .vertline. .ltoreq. 8
Dependencies are inferred from the claim text.