US4045126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-element microscope objective
Assignee: American Optical Corp
•
Filing: 1976-06-24
•
Granted: 1977-08-30
•
Expires: 1996-06-24
Abstract
Abstract A two-element objective having a numerical aperture of 0.10 in combination with a telescope objective as described in U.S. Pat. No. 3,355,234 and a typical 10× eyepiece has a magnification of 4× and a substantially flat 24mm image field.
Inventors
- 👤 Arthur H. Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:52
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
A microscope objective which has two elements aligned along an optical axis which comprises a biconcave negative doublet I and biconvex positive doublet II for the following optical parameters: ______________________________________
Index of
Spacing Refrac-
Lens Radius(R) Thickness(T)
(S) tion(ND)
No.(γ)
______________________________________
S.sub.1 =
.24167B
R.sub.1 =-4.36334B
T.sub.1 =.04651B 1.77<ND.sub.1
γ.sub.1 ≅25
<1.79
I R.sub.2 =- .25721B
T.sub.2 =.04070B 1.51<ND.sub.2
γ.sub.2 ≅64
<1.53
R.sub.3 = .27059B
S.sub.2 =
.48271B
R.sub.4 = .96467B
T.sub.3 =.04070B 1.77<ND.sub.3
γ.sub.3 ≅25
<1.79
II R.sub.5 = .42024B
T.sub.4 =.07558B 1.48<ND.sub.4
γ.sub.4 ≅70
<1.50
R.sub.6 =- .39640B
______________________________________ wherein B is equal to 41 to 45mm.
Claim 2
Dependent Claim
99 words
A microscope objective which has two elements aligned along an optical axis which comprises a biconcave negative doublet I and biconvex positive doublet II for the following optical parameters: ______________________________________
Index of
Spacing Refrac-
Lens Radius(R) Thickness(T)
(S) tion(ND)
No.(γ)
______________________________________
S.sub.1 =
.24167B
R.sub.1 =-4.36334B
T.sub.1 =.04651B 1.77<ND.sub.1
γ.sub.1 ≅25
<1.79
I R.sub.2 =- .25721B
T.sub.2 =.04070B 1.51<ND.sub.2
γ.sub.2 ≅64
<1.53
R.sub.3 = .27059B
S.sub.2 =
.48271B
R.sub.4 = .96467B
T.sub.3 =.04070B 1.77<ND.sub.3
γ.sub.3 ≅25
<1.79
II R.sub.5 = .42024B
T.sub.4 =.07558B 1.48<ND.sub.4
γ.sub.4 ≅70
<1.50
R.sub.6 =- .39640B
______________________________________ wherein B is equal to 41 to 45mm.
Claim 3
Dependent Claim
39 words
The microscope objective of claim 1 wherein B is equal to 43mm, ND 1 =1.78446; ND 2 =1.51867; ND 3 =1.78446 and ND 4 =1.48743 and ν 1 =25.74; ν 2 =64.45; ν 3 =25.74 and ν 4 =70.40.
References Cited (Backward Citations)
US3176583A
Cited
US3355234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |