US4113358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrofocus type wide-angle photographic lens system
Assignee: Olympus Corp
•
Filing: 1975-11-06
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Granted: 1978-09-12
•
Expires: 1995-11-06
Abstract
Abstract A compact retrofocus type wide-angle photographic lens system wherein aberrations are favorably corrected and which comprises a first lens component having negative power, a second lens component having positive power, a third negative lens component, a fourth positive meniscus lens component and a fifth positive lens component, said wide-angle photographic lens system being so adapted as to meet the following conditions. f < f.sub.B < 1.2f (1) 0.5f < Σd < 0.57f (2) 0.55f < f.sub.4,5 < 0.65f (3) | r.sub.a | < 1.5f (4)
Inventors
- 👤 Jihei Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:32
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/04; G02B13/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
179 words
A retrofocus type wide-angle photographic lens system comprising a first negative cemented doublet lens component, a second positive cemented doublet lens component, a third negative lens component, a fourth positive meniscus lens component and a fifth positive lens component, and said wide-angle photographic lens system having the following numerical data: ______________________________________
r.sub.1 = 0.89501
d.sub.1 = 0.19296
n.sub.1 = 1.72
ν.sub.1 = 42.1
r.sub.2 = 12.63956
d.sub.2 = 0.05513
n.sub.2 = 1.51633
ν.sub.2 = 64.2
r.sub.3 = 0.38615
d.sub.3 = 0.40384
r.sub.4 = 1.17183
d.sub.4 = 0.15409
n.sub.3 = 1.8061
ν.sub.3 = 40.9
r.sub.5 = 0.55000
d.sub.5 = 0.05513
n.sub.4 = 1.69895
ν.sub.4 = 30.1
r.sub.6 = 17.11794
d.sub.6 = 0.09648
r.sub.7 = -0.81932
d.sub.7 = 0.23073
n.sub.5 = 1.80518
ν.sub.5 = 25.4
r.sub.8 = 2.53199
d.sub.8 = 0.03584
r.sub.9 = -3.16141
d.sub.9 = 0.12818
n.sub.6 = 1.757
ν.sub.6 = 47.9
r.sub.10 = -0.59818
d.sub.10 = 0.00276
r.sub.11 = 1.77635
d.sub.11 = 0.08270
n.sub.7 = 1.757
ν.sub.7 = 47.9
r.sub.12 = -5.55394
f = 1.0 , f.sub.B = 1.06413 , F/2.0
f.sub.4,5 = 0.621 , Σd = 0.53643
______________________________________
Claim 2
Dependent Claim
179 words
A retrofocus type wide-angle photographic lens system comprising a first negative cemented doublet lens component, a second positive cemented doublet lens component, a third negative lens component, a fourth positive meniscus lens component and a fifth positive lens component, and said wide-angle photographic lens system having the following numerical data: ______________________________________
r.sub.1 = 0.89501
d.sub.1 = 0.19296
n.sub.1 = 1.72
ν.sub.1 = 42.1
r.sub.2 = 12.63956
d.sub.2 = 0.05513
n.sub.2 = 1.51633
ν.sub.2 = 64.2
r.sub.3 = 0.38615
d.sub.3 = 0.40384
r.sub.4 = 1.17183
d.sub.4 = 0.15409
n.sub.3 = 1.8061
ν.sub.3 = 40.9
r.sub.5 = 0.55000
d.sub.5 = 0.05513
n.sub.4 = 1.69895
ν.sub.4 = 30.1
r.sub.6 = 17.11794
d.sub.6 = 0.09648
r.sub.7 = -0.81932
d.sub.7 = 0.23073
n.sub.5 = 1.80518
ν.sub.5 = 25.4
r.sub.8 = 2.53199
d.sub.8 = 0.03584
r.sub.9 = -3.16141
d.sub.9 = 0.12818
n.sub.6 = 1.757
ν.sub.6 = 47.9
r.sub.10 = -0.59818
d.sub.10 = 0.00276
r.sub.11 = 1.77635
d.sub.11 = 0.08270
n.sub.7 = 1.757
ν.sub.7 = 47.9
r.sub.12 = -5.55394
f = 1.0 , f.sub.B = 1.06413 , F/2.0
f.sub.4,5 = 0.621 , Σd = 0.53643
______________________________________
Claim 3
Dependent Claim
179 words
A retrofocus type wide-angle photographic lens system comprising a first negative cemented doublet lens component, a second positive cemented doublet lens component, a third negative lens component, a fourth positive meniscus lens component and a fifth positive lens component, and said wide-angle photographic lens system having the following numerical data: ______________________________________
r.sub.1 = 0.92105
d.sub.1 = 0.19288
n.sub.1 = 1.72342
ν.sub.1 = 38.0
r.sub.2 = 5.22870
d.sub.2 = 0.05511
n.sub.2 = 1.51633
ν.sub.2 = 64.2
r.sub.3 = 0.37584
d.sub.3 = 0.41551
r.sub.4 = 1.25533
d.sub.4 = 0.15816
n.sub.3 = 1.8061
ν.sub.3 = 40.9
r.sub.5 = -0.46704
d.sub.5 = 0.05511
n.sub.4 = 1.69895
ν.sub.4 = 30.1
r.sub.6 = -20.22105
d.sub.6 = 0.12399
r.sub.7 = -0.83307
d.sub.7 = 0.19233
n.sub.5 = 1.80518
ν.sub.5 = 25.4
r.sub.8 = 2.48493
d.sub.8 = 0.04602
r.sub.9 = -2.94809
d.sub.9 = 0.09258
n.sub.6 = 1.757
ν.sub.6 = 47.9
r.sub.10 = -0.59996
d.sub.10 = 0.00276
r.sub.11 = 2.14910
d.sub.11 = 0.08266
n.sub.7 = 1.762
ν.sub.7 = 40.2
r.sub.12 = -3.42802
f = 1.0 , f.sub.B = 1.08251 , F/2.0
f.sub.4,5 = 0.629 , Σd = 0.52959
______________________________________
Claim 4
Dependent Claim
179 words
A retrofocus type wide-angle photographic lens system comprising a first negative cemented doublet lens component, a second positive cemented doublet lens component, a third negative lens component, a fourth positive meniscus lens component and a fifth positive lens component, and said wide-angle photographic lens system having the following numerical data: ______________________________________
r.sub.1 = 0.92105
d.sub.1 = 0.19288
n.sub.1 = 1.72342
ν.sub.1 = 38.0
r.sub.2 = 5.22870
d.sub.2 = 0.05511
n.sub.2 = 1.51633
ν.sub.2 = 64.2
r.sub.3 = 0.37584
d.sub.3 = 0.41551
r.sub.4 = 1.25533
d.sub.4 = 0.15816
n.sub.3 = 1.8061
ν.sub.3 = 40.9
r.sub.5 = -0.46704
d.sub.5 = 0.05511
n.sub.4 = 1.69895
ν.sub.4 = 30.1
r.sub.6 = -20.22105
d.sub.6 = 0.12399
r.sub.7 = -0.83307
d.sub.7 = 0.19233
n.sub.5 = 1.80518
ν.sub.5 = 25.4
r.sub.8 = 2.48493
d.sub.8 = 0.04602
r.sub.9 = -2.94809
d.sub.9 = 0.09258
n.sub.6 = 1.757
ν.sub.6 = 47.9
r.sub.10 = -0.59996
d.sub.10 = 0.00276
r.sub.11 = 2.14910
d.sub.11 = 0.08266
n.sub.7 = 1.762
ν.sub.7 = 40.2
r.sub.12 = -3.42802
f = 1.0 , f.sub.B = 1.08251 , F/2.0
f.sub.4,5 = 0.629 , Σd = 0.52959
______________________________________
Claim 5
Dependent Claim
151 words
A retrofocus type wide-angle photographic lens system comprising a first negative meniscus lens component, a second positive lens component, a third negative lens component, a fourth positive meniscus lens component and fifth positive lens component, and said wide-angle photograhic lens system having the following numerical data: ______________________________________
r.sub.1 = 1.52399
d.sub.1 = 0.04666
n.sub.1 = 1.51633
ν.sub.1 = 64.2
r.sub.2 = 0.44075
d.sub.2 = 0.33470
r.sub.3 = 0.65227
d.sub.3 = 0.36655
n.sub.2 = 1.72
ν.sub.2 = 50.3
r.sub.4 = -1.64457
d.sub.4 = 0.12852
r.sub.5 = -0.54644
d.sub.5 = 0.04414
n.sub.3 = 1.74077
ν.sub.3 = 27.8
r.sub.6 = 1.36494
d.sub.6 = 0.03911
r.sub.7 = -0.89578
d.sub.7 = 0.06817
n.sub.4 = 1.757
ν.sub.4 = 47.9
r.sub.8 = -0.42798
d.sub.8 = 0.00279
r.sub.9 = 1.66768
d.sub.9 = 0.06733
n.sub.5 = 1.713
ν.sub.5 = 53.9
r.sub.10 = -2.76854
f = 1.0 , f.sub.B = 1.08095 , F/2.8
f.sub.4,5 = 0.598 , Σd = 0.53921
______________________________________
Claim 6
Dependent Claim
151 words
A retrofocus type wide-angle photographic lens system comprising a first negative meniscus lens component, a second positive lens component, a third negative lens component, a fourth positive meniscus lens component and fifth positive lens component, and said wide-angle photograhic lens system having the following numerical data: ______________________________________
r.sub.1 = 1.52399
d.sub.1 = 0.04666
n.sub.1 = 1.51633
ν.sub.1 = 64.2
r.sub.2 = 0.44075
d.sub.2 = 0.33470
r.sub.3 = 0.65227
d.sub.3 = 0.36655
n.sub.2 = 1.72
ν.sub.2 = 50.3
r.sub.4 = -1.64457
d.sub.4 = 0.12852
r.sub.5 = -0.54644
d.sub.5 = 0.04414
n.sub.3 = 1.74077
ν.sub.3 = 27.8
r.sub.6 = 1.36494
d.sub.6 = 0.03911
r.sub.7 = -0.89578
d.sub.7 = 0.06817
n.sub.4 = 1.757
ν.sub.4 = 47.9
r.sub.8 = -0.42798
d.sub.8 = 0.00279
r.sub.9 = 1.66768
d.sub.9 = 0.06733
n.sub.5 = 1.713
ν.sub.5 = 53.9
r.sub.10 = -2.76854
f = 1.0 , f.sub.B = 1.08095 , F/2.8
f.sub.4,5 = 0.598 , Σd = 0.53921
______________________________________
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |