US4376570A
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Microscope objective
Assignee: American Optical Corp
•
Filing: 1981-03-16
•
Granted: 1983-03-15
•
Expires: 2001-03-16
Abstract
Abstract A five component microscope objective has a numerical aperture of 1.25. When used with a telescope as described in U.S. Pat. No. 3,355,234 and an immersion oil, the objective provides a magnification of 100×X in an embodiment having a focal length of 1.824 mm and is well corrected for the usual chromatic image aberrations, spherical aberration, coma and astigmatism.
Inventors
- 👤 Milton H. Sussman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:31
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/33; G02B21/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
244 words
A five-component microscope objective having an N.A. of 1.25 comprising a plano-convex doublet I, a concavo-convex singlet II, a biconvex doublet III, a biconvex doublet IV and a convex-concavo doublet V having the following parameters: ______________________________________
Radius Thickness Spacing
Lens (R) (T) (S)
______________________________________
S.sub.1 = 0.148f
R.sub.1 = ∞
T.sub.1 = 0.313f
I R.sub.2 = -0.583f
T.sub.2 = 1.469f
R.sub.3 = -1.356f
S.sub.2 = 0.011f
R.sub.4 = -7.791f
II T.sub.3 = 1.096f
R.sub.5 = -3.448f
S.sub.3 = 0.872f
R.sub.6 = 7.582f
T.sub.4 = 0.658f
III R.sub.7 = 4.404f
T.sub.5 = 2.632f
R.sub. 8 = -4.404f
S.sub.4 = 0.027f
R.sub.9 = 12.084f
T.sub.6 = 0.658f
IV R.sub.10 = 3.284f
T.sub.7 = 2.522f
R.sub.11 = -9.956f
S.sub.5 = 8.728f
R.sub.12 = 78.162f
T.sub.8 = 1.371f
V R.sub.13 = -3.448f
T.sub.9 = 0.828f
R.sub.14 = 4.342f
______________________________________
Refractive Abbe
Index No
Lens (ND) (ν)
______________________________________
1.53 < ND.sub.1 < 1.55
50< ν.sub.1 < 52
I
1.87 < ND.sub.2 < 1.89
40 < ν.sub.2 < 42
II 1.78 < ND.sub.3 < 1.80
46.5 < ν.sub.3 < 48.5
1.77 < ND.sub.4 < 1.79
25< ν.sub.4 < 27
III
1.43 < ND.sub.5 < 1.45
94.5 < ν.sub.5 < 96.5
1.77 < ND.sub.6 < 1.79
25 < ν.sub.6 < 27
IV
1.43 < ND.sub.7 < 1.45
94.5 < ν.sub.7 < 96.5
1.77 < ND.sub.8 < 1.79
25 < ν.sub.8 < 27
V
1.60 < ND.sub.9 < 1.62
43.5 < ν.sub.9 < 45.5
______________________________________
wherein f = 1.8 to 1.85 mm.
Claim 2
Dependent Claim
244 words
A five-component microscope objective having an N.A. of 1.25 comprising a plano-convex doublet I, a concavo-convex singlet II, a biconvex doublet III, a biconvex doublet IV and a convex-concavo doublet V having the following parameters: ______________________________________
Radius Thickness Spacing
Lens (R) (T) (S)
______________________________________
S.sub.1 = 0.148f
R.sub.1 = ∞
T.sub.1 = 0.313f
I R.sub.2 = -0.583f
T.sub.2 = 1.469f
R.sub.3 = -1.356f
S.sub.2 = 0.011f
R.sub.4 = -7.791f
II T.sub.3 = 1.096f
R.sub.5 = -3.448f
S.sub.3 = 0.872f
R.sub.6 = 7.582f
T.sub.4 = 0.658f
III R.sub.7 = 4.404f
T.sub.5 = 2.632f
R.sub. 8 = -4.404f
S.sub.4 = 0.027f
R.sub.9 = 12.084f
T.sub.6 = 0.658f
IV R.sub.10 = 3.284f
T.sub.7 = 2.522f
R.sub.11 = -9.956f
S.sub.5 = 8.728f
R.sub.12 = 78.162f
T.sub.8 = 1.371f
V R.sub.13 = -3.448f
T.sub.9 = 0.828f
R.sub.14 = 4.342f
______________________________________
Refractive Abbe
Index No
Lens (ND) (ν)
______________________________________
1.53 < ND.sub.1 < 1.55
50< ν.sub.1 < 52
I
1.87 < ND.sub.2 < 1.89
40 < ν.sub.2 < 42
II 1.78 < ND.sub.3 < 1.80
46.5 < ν.sub.3 < 48.5
1.77 < ND.sub.4 < 1.79
25< ν.sub.4 < 27
III
1.43 < ND.sub.5 < 1.45
94.5 < ν.sub.5 < 96.5
1.77 < ND.sub.6 < 1.79
25 < ν.sub.6 < 27
IV
1.43 < ND.sub.7 < 1.45
94.5 < ν.sub.7 < 96.5
1.77 < ND.sub.8 < 1.79
25 < ν.sub.8 < 27
V
1.60 < ND.sub.9 < 1.62
43.5 < ν.sub.9 < 45.5
______________________________________
wherein f = 1.8 to 1.85 mm.
Claim 3
Dependent Claim
78 words
The objective of claim 1 wherein f is 1.824 mm, ND 1 is 1.540, ND 2 is 1.883, ND 3 is 1.788, ND 4 and ND 6 and ND 8 are 1.784, ND 5 and ND 7 are 1.434, ND 9 , is 1.613, ν 1 is 51.1, ν 2 is 40.8, ν 3 is 47.4, ν 4 and ν 6 and ν 8 are 26.1, ν 5 and ν 7 are 95.6, and ν 9 is 44.3.
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) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |