US3659924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four member 100x microscope objective
Assignee: American Optical Corp
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Filing: 1971-03-18
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Granted: 1972-05-02
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Expires: 1991-03-18
Abstract
Abstract A four member achromatic oil immersion microscope objective having a numerical aperture of substantially 1.25 and a magnification of substantially 100X.
Inventors
- 👤 Arthur H Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:02
CPC Classifications
G; G02; G02B; G02B21/00; 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 chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising: A FRONT PLANO-CONVEX 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 double convex lens member IV; a fifth double concave lens member V; a sixth double convex lens member VI; said fourth , fifth and sixth members forming A triplet; a seventh convex-plano lens member VII; an eighth plano-concave lens member VIII; said seventh and eighth members forming a doublet; all of said lens members being axially aligned; the parameters of lens radii (R1 - R12), lens thicknesses (T1 T8), axial spaces among lens elements and object plane (S1 S4), refractive indices (ND1 - ND9) and Abbe numbers ( gamma 1 - gamma 9), being determined by the following relationship wherein all radii, thicknesses, and spaces are in millimeters:
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 chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising: A FRONT PLANO-CONVEX 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 double convex lens member IV; a fifth double concave lens member V; a sixth double convex lens member VI; said fourth , fifth and sixth members forming A triplet; a seventh convex-plano lens member VII; an eighth plano-concave lens member VIII; said seventh and eighth members forming a doublet; all of said lens members being axially aligned; the parameters of lens radii (R1 - R12), lens thicknesses (T1 T8), axial spaces among lens elements and object plane (S1 S4), refractive indices (ND1 - ND9) and Abbe numbers ( gamma 1 - gamma 9), being determined by the following relationship wherein all radii, thicknesses, and spaces are in millimeters:
Claim 3
Dependent Claim
178 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 chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising: a front plano-convex 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 double convex lens member IV; a fifth double concave lens member V; a sixth double convex lens member VI; said fourth, fifth and sixth members forming a triplet; a seventh convex-plano lens member VII; an eighth plano-concave lens member VIII; said seventh and eighth members forming a doublet; all of said lens members being axially aligned; the parameters of lens radii (R1 - R12), lens thicknesses (T1 -T8), axial spaces among lens elements and object plane (S1 -S4), refractive indices (ND1 - ND9) and Abbe numbers ( gamma 1 - gamma 9), being determined by the following relationship wherein all radii, thicknesses, and spaces are in millimeters:
Claim 4
Dependent Claim
178 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 chromatic aberrations, coma, astigmatism, and curvature of image field, said objective comprising: a front plano-convex 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 double convex lens member IV; a fifth double concave lens member V; a sixth double convex lens member VI; said fourth, fifth and sixth members forming a triplet; a seventh convex-plano lens member VII; an eighth plano-concave lens member VIII; said seventh and eighth members forming a doublet; all of said lens members being axially aligned; the parameters of lens radii (R1 - R12), lens thicknesses (T1 -T8), axial spaces among lens elements and object plane (S1 -S4), refractive indices (ND1 - ND9) and Abbe numbers ( gamma 1 - gamma 9), being determined by the following relationship wherein all radii, thicknesses, and spaces are in millimeters:
References Cited (Backward Citations)
US3514189A
Cited
US3537772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |