US4746204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zoom lens having magnification factors in the range of 14X to 32X for micrographic applications
Assignee: 3M Co
•
Filing: 1987-04-01
•
Granted: 1988-05-24
•
Expires: 2007-04-01
Abstract
Abstract A zoom lens system having magnification factors in the range of 14 to 32. 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
2026-11-04 11:02
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/02; G02B15/00; G02B15/14; G02B15/146
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
A variable focal length lens systems for use in micrographic projectors and printers comprising lenses according to the following Table: ______________________________________
RADIUS
SUR- OF THICK- SEPARA-
FACE CURVATURE NESS TION TOLERANCE
______________________________________
S1 -868.220
1.30 0.100
S2 17.797
1.42 0.020
S3 -43.933
1.20 0.050
S4 -153.369
1.80 0.020
S5 33.187
2.21 0.100
S6 -112.047
1.000-
27.592
S7 n/a
1.00
S8 57.411
2.55 0.10
S9 -79.230
0.10 0.050
S10 19.688
8.20 0.050
S11 -28.261
6.28 0.050
S12 17.217
2.56 0.050
S13 162.895
12.0 0.05
S14 -40.416
______________________________________
INDEX
OF
SURFACE REFRACTION DECENTRATION TILT
______________________________________
S1
1.83400 0.015 0.056
S2
S3
1.83400 0.030 0.057
S4
S5
1.78470 0.015 0.053
S6
S7
S8
1.74100 0.020 0.046
S9
S10
1.48749 0.015 0.062
S11
1.67270
S12
S13
1.77250 0.020 0.067
S14
______________________________________
Claim 2
Dependent Claim
127 words
A variable focal length lens systems for use in micrographic projectors and printers comprising lenses according to the following Table: ______________________________________
RADIUS
SUR- OF THICK- SEPARA-
FACE CURVATURE NESS TION TOLERANCE
______________________________________
S1 -868.220
1.30 0.100
S2 17.797
1.42 0.020
S3 -43.933
1.20 0.050
S4 -153.369
1.80 0.020
S5 33.187
2.21 0.100
S6 -112.047
1.000-
27.592
S7 n/a
1.00
S8 57.411
2.55 0.10
S9 -79.230
0.10 0.050
S10 19.688
8.20 0.050
S11 -28.261
6.28 0.050
S12 17.217
2.56 0.050
S13 162.895
12.0 0.05
S14 -40.416
______________________________________
INDEX
OF
SURFACE REFRACTION DECENTRATION TILT
______________________________________
S1
1.83400 0.015 0.056
S2
S3
1.83400 0.030 0.057
S4
S5
1.78470 0.015 0.053
S6
S7
S8
1.74100 0.020 0.046
S9
S10
1.48749 0.015 0.062
S11
1.67270
S12
S13
1.77250 0.020 0.067
S14
______________________________________
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) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |