Patent US4743102A successfully refreshed from Google Patents.
US4743102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zoom lens having magnification factors in the range of 12X to 24X for micrographic applications
Assignee: 3M Co
•
Filing: 1987-04-01
•
Granted: 1988-05-10
•
Expires: 2007-04-01
Abstract
Abstract A zoom lens system which provides magnification factors in the range of 12 to 24. The lens system of the invention is particularly useful in micrographic reader/printers.
Inventors
- 👤 Gerhardt H. Pareigat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:36
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/02; G02B15/00; G02B15/14; G02B15/142
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
122 words
A variable focal length lens systems for use in micrographic projectors and printers comprising lenses according to the following Table: ______________________________________
RADIUS
OF
SURFACE CURVATURE THICKNESS SEPARATION
______________________________________
S1 -89.628
1.20
S2 24.806
0.98
S3 -64.012
1.20
S4 -297.992
2.55
S5 43.005
2.10
S6 -69.773
2.000-
27.896
S7 97.970
2.20
S8 -76.200
0.11
S9 19.253
7.99
S10 -29.940
6.90
S11 17.797
1.26
S12 691.830
1.80
S13 -45.909
______________________________________
INDEX
TOLER- OF DECEN-
SURFACE ANCE REFRACTION TRATION TILT
______________________________________
S1
0.10 1.83400 0.015 0.066
S2
0.025
S3
0.05 1.83400 0.020 0.048
S4
0.025
S5
0.05 1.74077 0.015 0.063
S6
S7
0.50 1.77250 0.026 0.053
S8
0.05
S9
0.05 1.48749 0.020 0.053
S10
0.05
S11
0.03 1.64769
S12
0.05 1.77250 0.015 0.060
S13
______________________________________
Claim 2
Dependent Claim
122 words
A variable focal length lens systems for use in micrographic projectors and printers comprising lenses according to the following Table: ______________________________________
RADIUS
OF
SURFACE CURVATURE THICKNESS SEPARATION
______________________________________
S1 -89.628
1.20
S2 24.806
0.98
S3 -64.012
1.20
S4 -297.992
2.55
S5 43.005
2.10
S6 -69.773
2.000-
27.896
S7 97.970
2.20
S8 -76.200
0.11
S9 19.253
7.99
S10 -29.940
6.90
S11 17.797
1.26
S12 691.830
1.80
S13 -45.909
______________________________________
INDEX
TOLER- OF DECEN-
SURFACE ANCE REFRACTION TRATION TILT
______________________________________
S1
0.10 1.83400 0.015 0.066
S2
0.025
S3
0.05 1.83400 0.020 0.048
S4
0.025
S5
0.05 1.74077 0.015 0.063
S6
S7
0.50 1.77250 0.026 0.053
S8
0.05
S9
0.05 1.48749 0.020 0.053
S10
0.05
S11
0.03 1.64769
S12
0.05 1.77250 0.015 0.060
S13
______________________________________
Claim 3
Dependent Claim
18 words
The lens system of claim 1 further comprising a prism for rotating images produced by said lens system.
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) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |