Patent US20030128182A1 successfully refreshed from Google Patents.
US3592530A
Expired / Lapsed
US
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Anastigmatic medium-power microscope objective providing a flattened image field
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1964-06-25
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Granted: 1971-07-13
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Expires: 1984-06-25
Abstract
Abstract The invention provides an anastigmatic medium-power microscope objective which provides a flattened image field and which consists of a small number of lenses divided into two groups for correcting substantially all image errors. The first group of lenses comprises a thick meniscus lens having positive refractive effect next to the object, and one or two converging lens members arranged close to each other, at least one of the latter being a doublet having a convex cemented surface facing the object. The second group of lenses consists of a simple converging lens and a simple diverging lens following the lenses of the first group along the optical axis from the object. The spacing of the two groups of lenses is appropriately designed for the desired purpose of providing an anastigmatic flattened image with these groups of lenses and is at least half the axial distance between the object and the apex.
Inventors
- 👤 Walter Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:20
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
185 words
In an improved anastigmatic medium-power flat field microscope objective having a first and a second group of lenses positioned along an optical axis, the first group of lenses being positioned nearest to the object plane and consisting of a thick negative meniscus converging lens constituting the front lens of the object and a converging doublet having a convex cemented surface facing the object, and the second group of lenses being positioned farthest from the object plane consisting of a simple converging lens and a simple diverging lens positioned the farthest away from the object, the axial distance between the lenses of the first group and the axial thickness of the front lens of the objective being such that the axial distance of the converging doublet from the front lens is smaller than the axial thickness of the front lens, and the axial distance between the first and second group of lenses being at least half the axial distance between the object and the apex of the objective lens facing the image projected by the objective, and wherein the parameters of the lenses are as follows:
Claim 2
Dependent Claim
185 words
In an improved anastigmatic medium-power flat field microscope objective having a first and a second group of lenses positioned along an optical axis, the first group of lenses being positioned nearest to the object plane and consisting of a thick negative meniscus converging lens constituting the front lens of the object and a converging doublet having a convex cemented surface facing the object, and the second group of lenses being positioned farthest from the object plane consisting of a simple converging lens and a simple diverging lens positioned the farthest away from the object, the axial distance between the lenses of the first group and the axial thickness of the front lens of the objective being such that the axial distance of the converging doublet from the front lens is smaller than the axial thickness of the front lens, and the axial distance between the first and second group of lenses being at least half the axial distance between the object and the apex of the objective lens facing the image projected by the objective, and wherein the parameters of the lenses are as follows:
Claim 3
Dependent Claim
167 words
In an improved anastigmatic medium-power flat field microscope objective having a first and a second group of lenses positioned along an optical axis, the first group of lenses being positioned nearest to the object plane and consisting of a thick negative meniscus, converging lens constituting the front lens of the objective and two cemented converging doublets at least one having a convex cemented surface facing the object, and the second group of lenses being positioned farthest from the object plane consisting of a simple converging lens and a simple diverging lens positioned farthest away from the object, the axial distance between the lenses of the first group being such that the axial distance of the converging doublets from each preceding lens is smaller than the axial thickness of the preceding lens, and the axial distance between the first and second group of lenses being at least half the axial distance between the object and the apex of the objective lens facing the image projected by the objective.
Claim 4
Dependent Claim
167 words
In an improved anastigmatic medium-power flat field microscope objective having a first and a second group of lenses positioned along an optical axis, the first group of lenses being positioned nearest to the object plane and consisting of a thick negative meniscus, converging lens constituting the front lens of the objective and two cemented converging doublets at least one having a convex cemented surface facing the object, and the second group of lenses being positioned farthest from the object plane consisting of a simple converging lens and a simple diverging lens positioned farthest away from the object, the axial distance between the lenses of the first group being such that the axial distance of the converging doublets from each preceding lens is smaller than the axial thickness of the preceding lens, and the axial distance between the first and second group of lenses being at least half the axial distance between the object and the apex of the objective lens facing the image projected by the objective.
Claim 5
Dependent Claim
15 words
The microscope objective of claim 2, wherein the parameters of the lenses are as follows:
Claim 6
Dependent Claim
175 words
In an improved anastigmatic medium-power flat field microscope objective having a first and a second group of lensEs positioned along an optical axis, the first group of lenses being positioned nearest to the object plane and consisting of a thick negative meniscus, converging lens constituting the front lens of the objective, a converging doublet having a convex cemented surface facing the object and a simple converging lens positioned between the front lens and the doublet, and the second group of lenses being positioned farthest from the object plane consisting of a simple converging lens and a simple diverging lens positioned farthest away from the object, the axial distance between the lenses of the first group being such that the axial distance of the converging lenses from each preceding lens is smaller than the axial thickness of the preceding lens, and the axial distance between the first and second group of lenses being at least half the axial distance between the object and the apex of the objective lens facing the image projected by the objective.
Claim 7
Dependent Claim
175 words
In an improved anastigmatic medium-power flat field microscope objective having a first and a second group of lensEs positioned along an optical axis, the first group of lenses being positioned nearest to the object plane and consisting of a thick negative meniscus, converging lens constituting the front lens of the objective, a converging doublet having a convex cemented surface facing the object and a simple converging lens positioned between the front lens and the doublet, and the second group of lenses being positioned farthest from the object plane consisting of a simple converging lens and a simple diverging lens positioned farthest away from the object, the axial distance between the lenses of the first group being such that the axial distance of the converging lenses from each preceding lens is smaller than the axial thickness of the preceding lens, and the axial distance between the first and second group of lenses being at least half the axial distance between the object and the apex of the objective lens facing the image projected by the objective.
Claim 8
Dependent Claim
15 words
The microscope objective of claim 4, wherein the parameters of the lenses are as follows:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |