US3598474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-immersion-type microscope objective
Assignee: American Optical Corp
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Filing: 1970-03-18
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Granted: 1971-08-10
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Expires: 1990-03-18
Abstract
Abstract A five-member microscope objective having a numerical aperture of substantially 1.25 and a magnification of substantially 100 X .
Inventors
- 👤 Arthur H Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:46
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/33; G02B21/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
179 words
An achromatic microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.25 for forming an image of an object plane, said image being well corrected for spherical and chromatic aberrations, coma, astigmatism and curvature of image field, said objective comprising: A FRONT PLANOCONVEX LENS MEMBER I; a second concavo-convex lens member II; said front and second members forming a doublet; a third concavo-convex lens member III; a fourth convex-concavo lens member IV; a fifth double convex lens member V; said fourth and fifth members forming a doublet; a sixth convex-concavo lens member VI; a seventh double convex lens member VII; said sixth and seventh members forming a doublet; an eighth double convex lens member VIII; a ninth double concave lens member IX; said eighth and ninth members forming a doublet; all of said lens members being axially aligned; and the parameters of lens radii (R1-R14), lens thicknesses (T1-T9), axial spaces among lens elements and object plane (S1-S5), refractive indices (ND1-ND9), and Abbe numbers ( Nu 1- Nu 9), being determined by the following relationship:
Claim 2
Dependent Claim
179 words
An achromatic microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.25 for forming an image of an object plane, said image being well corrected for spherical and chromatic aberrations, coma, astigmatism and curvature of image field, said objective comprising: A FRONT PLANOCONVEX LENS MEMBER I; a second concavo-convex lens member II; said front and second members forming a doublet; a third concavo-convex lens member III; a fourth convex-concavo lens member IV; a fifth double convex lens member V; said fourth and fifth members forming a doublet; a sixth convex-concavo lens member VI; a seventh double convex lens member VII; said sixth and seventh members forming a doublet; an eighth double convex lens member VIII; a ninth double concave lens member IX; said eighth and ninth members forming a doublet; all of said lens members being axially aligned; and the parameters of lens radii (R1-R14), lens thicknesses (T1-T9), axial spaces among lens elements and object plane (S1-S5), refractive indices (ND1-ND9), and Abbe numbers ( Nu 1- Nu 9), being determined by the following relationship:
Claim 3
Dependent Claim
175 words
An achromatic microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.25 for forming an image of an object plane, said image being well corrected for spherical and chromatic aberrations, coma, astigmatism and curvature of image field, said objective comprising: a front planoconvex lens member I; a second concavo-convex lens member II; said front and second members forming a doublet; a third concavo-convex lens member III; a fourth convex-concavo lens member IV; a fifth double convex lens member V; said fourth and fifth members forming a doublet; a sixth convex-concavo lens member VI; a seventh double convex lens member VII; said sixth and seventh members forming a doublet; an eighth double convex lens member VIII; a ninth double concave lens member IX; said eighth and ninth members forming a doublet; all of said lens members being axially aligned; and the parameters of lens radii (R1-R14), lens thicknesses (T1-T9), axial spaces among lens elements and object plane (S1-S5), refractive indices (ND1-ND9), and Abbe numbers ( Nu 1- Nu 9) as follows:
Claim 4
Dependent Claim
175 words
An achromatic microscope objective having a magnification of substantially 100X and a numerical aperture of substantially 1.25 for forming an image of an object plane, said image being well corrected for spherical and chromatic aberrations, coma, astigmatism and curvature of image field, said objective comprising: a front planoconvex lens member I; a second concavo-convex lens member II; said front and second members forming a doublet; a third concavo-convex lens member III; a fourth convex-concavo lens member IV; a fifth double convex lens member V; said fourth and fifth members forming a doublet; a sixth convex-concavo lens member VI; a seventh double convex lens member VII; said sixth and seventh members forming a doublet; an eighth double convex lens member VIII; a ninth double concave lens member IX; said eighth and ninth members forming a doublet; all of said lens members being axially aligned; and the parameters of lens radii (R1-R14), lens thicknesses (T1-T9), axial spaces among lens elements and object plane (S1-S5), refractive indices (ND1-ND9), and Abbe numbers ( Nu 1- Nu 9) as follows:
References Cited (Backward Citations)
US3437398A
Cited
US3497290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |