US3887269A
Expired / Lapsed
US
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Supertelescopic lens system
Assignee: Olympus Corp
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Filing: 1973-10-26
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Granted: 1975-06-03
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Expires: 1993-10-26
Abstract
Abstract A supertelescopic lens system has front and rear groups of lenses spaced apart one from the other by a large air space. The front group of the lens system comprises a positive single first lens, negative single second lens and positive single third lens while the rear group of the lens system comprises a positive single fourth lens and negative single fifth lens. The whole lens system is designed to satisfy the following four conditions 1. 0.45F < f123 < 0.
Inventors
- 👤 Jihei Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:50
CPC Classifications
G; G02; G02B; G02B9/00; G02B9/60; G02B23/00
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
180 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions 1. 0.45f < f123 < 0.6f, 2. n2 > 1.7 and n3 > 1.7, 3. 0.20f < r7 < 0.26f and 0.11f < r10 < 0.13f, and 4. 0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses.
Claim 2
Dependent Claim
180 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions 1. 0.45f < f123 < 0.6f, 2. n2 > 1.7 and n3 > 1.7, 3. 0.20f < r7 < 0.26f and 0.11f < r10 < 0.13f, and 4. 0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses.
Claim 3
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 4
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 5
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 6
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 7
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 8
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 9
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 10
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 11
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 12
Dependent Claim
5 words
0.45f < f123 < 0.6f,
Claim 13
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 14
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 15
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 16
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 17
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 18
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 19
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 20
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 21
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 22
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 23
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 24
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 25
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 26
Dependent Claim
7 words
n2 > 1.7 and n3 > 1.7,
Claim 27
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 28
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 29
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 30
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 31
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 32
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 33
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 34
Dependent Claim
12 words
0.1f < r7 < 0.4f and 0.1f < r10 < 0.4f, and
Claim 35
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 36
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 37
Dependent Claim
12 words
0.20f < r7 < 0.26f and 0.11f < r10 < 0.13f, and
Claim 38
Dependent Claim
12 words
0.20f < r7 < 0.26f and 0.11f < r10 < 0.13f, and
Claim 39
Dependent Claim
76 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses.
Claim 40
Dependent Claim
76 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses.
Claim 41
Dependent Claim
114 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm, fB is 32.58 mm and F is 1: 11, f123 51.6 mm, f4 53.8 mm and telephoto ratio is 0.702, and ri, di, ni and vi (Abbe''s numbers) are defined by the following values:
Claim 42
Dependent Claim
114 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm, fB is 32.58 mm and F is 1: 11, f123 51.6 mm, f4 53.8 mm and telephoto ratio is 0.702, and ri, di, ni and vi (Abbe''s numbers) are defined by the following values:
Claim 43
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 44
Dependent Claim
76 words
A supertelescopic lens system comprising a positive single first lens, a negative single second lens, a positive single third lens, said first, second and third lenses forming a front group of the lens system, a positive single fourth lens, and a negative single fifth lens, said fourth and fifth lenses being separated from said front group of the lens system by a large air space, and the whole lens system being such that the four conditions
Claim 45
Dependent Claim
114 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm, fB is 36.234 mm, F is 1:11, f123 is 54.890 mm, f4 is 59,975 mm and telephoto ratio is 0.74 and ri, di, ni anD vi (Abbe''s numbers) are defined by the following values:
Claim 46
Dependent Claim
114 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm, fB is 36.234 mm, F is 1:11, f123 is 54.890 mm, f4 is 59,975 mm and telephoto ratio is 0.74 and ri, di, ni anD vi (Abbe''s numbers) are defined by the following values:
Claim 47
Dependent Claim
114 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm, fB is 33.717 mm, F is 1:11, f123 is 48.934 mm, f4 is 54.823 mm and telephoto ratio is 0.69 and ri, di, ni and vi (Abbe''s numbers) are defined by the following values:
Claim 48
Dependent Claim
114 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm, fB is 33.717 mm, F is 1:11, f123 is 48.934 mm, f4 is 54.823 mm and telephoto ratio is 0.69 and ri, di, ni and vi (Abbe''s numbers) are defined by the following values:
Claim 49
Dependent Claim
112 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm fB 30.948, F is 1:11, f123 is 51.217 mm, f4 is 47.798 mm and telephoto ratio is 0.684 and ri, di, ni and vi (Abbe''s numbers) are defined by the following values:
Claim 50
Dependent Claim
112 words
0.45f < f4 < 0.6f are satisfied where f is the composite focal length of the whole lens system, f123 the composite focal length of the front group of the lens system, f4 the focal length of the fourth lens, and ri, di and ni (i 1, 2, 3, ...) the radii of curvature of respective lenses, axial thicknesses of the respective lenses or air spaces between adjacent lenses and refractive indexes of the respective lenses, wherein f 100 mm fB 30.948, F is 1:11, f123 is 51.217 mm, f4 is 47.798 mm and telephoto ratio is 0.684 and ri, di, ni and vi (Abbe''s numbers) are defined by the following values:
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |