US3867018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Five component microscope eyepiece
Assignee: American Optical Corp
•
Filing: 1974-02-04
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Granted: 1975-02-18
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Expires: 1994-02-04
Abstract
Abstract This invention relates to a microscope eyepiece having a magnification of substantially 10X, an apparent field of view of substantially 52.3*, and a maximum exit pupil diameter of substantially 1.60 millimeters.
Inventors
- 👤 Arthur H Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:17
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/001
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A five component microscope eyepiece having a magnification of substantially 10X consisting of the following components in optical alignment: A plano concave positive lens I; a double concave singlet II; a meniscus shaped negative singlet III; a double convex singlet IV; and a convex concavo positive doublet V.
Claim 2
Dependent Claim
48 words
A five component microscope eyepiece having a magnification of substantially 10X consisting of the following components in optical alignment: A plano concave positive lens I; a double concave singlet II; a meniscus shaped negative singlet III; a double convex singlet IV; and a convex concavo positive doublet V.
Claim 3
Dependent Claim
41 words
The microscope eyepiece of claim 1 in which the parameters of lens radii (R), thicknesses (T), and spacings (S) are expressed in millimeters and a negative sign indicates lens radii on centers of curvature on the object side of the lens
Claim 4
Dependent Claim
10 words
The microscope eyepiece of claim 2 in which F 25.122.
References Cited (Backward Citations)
US3638996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |