US3749478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens system having a large aperture and long focal length
Assignee: Olympus Corp
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Filing: 1972-04-07
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Granted: 1973-07-31
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Expires: 1992-04-07
Abstract
Abstract A lens system having a large aperture and a long focal length, which is constructed as five components and five lenses and consists of first, second and third components of positive meniscus lenses, each having at its object side a convex surface, a fourth component of a negative meniscus lens that has at its object side a convex surface, and a fifth component of a positive lens separated from the fourth component by a large air space, all lenses being arranged in succession from the side of an object, and which is defined by the following five conditions, i.e.
Inventors
- 👤 J Nakagawa
- 👤 S Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:08
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/02; G02B13/0005
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
229 words
A lens system having a large aperture and a long focal length, which is constructed as five components and five lenses and consists of first, second and third components of positive meniscus lenses, each having at its object side a convex surface, a fourth component of a negative meniscus lens that has at its object side a convex surface, and a fifth component of a positive meniscus lens separated from the fourth component by a large air space, all lenses being arranged in succession from the side of an object, and which is defined by the following five conditions, i.e., 1. n1+n2+n3/3 > 1.6, 2. 3f > f3 > 4f1,2,3, 3. n4 > 1.7, 4. 0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and 5. Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2 . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses.
Claim 2
Dependent Claim
229 words
A lens system having a large aperture and a long focal length, which is constructed as five components and five lenses and consists of first, second and third components of positive meniscus lenses, each having at its object side a convex surface, a fourth component of a negative meniscus lens that has at its object side a convex surface, and a fifth component of a positive meniscus lens separated from the fourth component by a large air space, all lenses being arranged in succession from the side of an object, and which is defined by the following five conditions, i.e., 1. n1+n2+n3/3 > 1.6, 2. 3f > f3 > 4f1,2,3, 3. n4 > 1.7, 4. 0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and 5. Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2 . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses.
Claim 3
Dependent Claim
5 words
3f > f3 > 4f1,2,3,
Claim 4
Dependent Claim
5 words
3f > f3 > 4f1,2,3,
Claim 5
Dependent Claim
5 words
3f > f3 > 4f1,2,3
Claim 6
Dependent Claim
5 words
3f > f3 > 4f1,2,3
Claim 7
Dependent Claim
5 words
3f > f3 > 4f1,2,3,
Claim 8
Dependent Claim
5 words
3f > f3 > 4f1,2,3,
Claim 9
Dependent Claim
99 words
A lens system having a large aperture and a long focal length, which is constructed as five components and five lenses and consists of first, second and third components of positive meniscus lenses, each having at its object side a convex surface, a fourth component of a negative mensicus lens that has at its object side a convex surface, and a fifth component of a positive lens separated from the fourth component by a large air space, all lenses being arranged in succession from the side of an object, and which is defined by the following five conditions, i.e.,
Claim 10
Dependent Claim
99 words
A lens system having a large aperture and a long focal length, which is constructed as five components and five lenses and consists of first, second and third components of positive meniscus lenses, each having at its object side a convex surface, a fourth component of a negative mensicus lens that has at its object side a convex surface, and a fifth component of a positive lens separated from the fourth component by a large air space, all lenses being arranged in succession from the side of an object, and which is defined by the following five conditions, i.e.,
Claim 11
Dependent Claim
3 words
n4 > 1.7,
Claim 12
Dependent Claim
3 words
n4 > 1.7,
Claim 13
Dependent Claim
99 words
A lens system having a large aperture and a long focal length, which is constructed as five components and five lenses and consists of first, second and third components of positive meniscus lenses, each having at its object side a convex surface, a fourth component of a negative meniscus lens that has at its object side a convex surface, and a fifth component of a positive lens separated from the fourth component by a large air space, all lenses being arranged in succession from the side of an object, and which is defined by the following five conditions, i.e.
Claim 14
Dependent Claim
99 words
A lens system having a large aperture and a long focal length, which is constructed as five components and five lenses and consists of first, second and third components of positive meniscus lenses, each having at its object side a convex surface, a fourth component of a negative meniscus lens that has at its object side a convex surface, and a fifth component of a positive lens separated from the fourth component by a large air space, all lenses being arranged in succession from the side of an object, and which is defined by the following five conditions, i.e.
Claim 15
Dependent Claim
3 words
n4 > 1.7,
Claim 16
Dependent Claim
3 words
n4 > 1.7,
Claim 17
Dependent Claim
3 words
n4 > 1.7,
Claim 18
Dependent Claim
3 words
n4 > 1.7,
Claim 19
Dependent Claim
6 words
0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and
Claim 20
Dependent Claim
6 words
0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and
Claim 21
Dependent Claim
6 words
0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and
Claim 22
Dependent Claim
6 words
0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and
Claim 23
Dependent Claim
6 words
0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and
Claim 24
Dependent Claim
6 words
0.24f > d1+d2+d3+d4+d5+d6 > 0.12f, and
Claim 25
Dependent Claim
107 words
Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2 . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses.
Claim 26
Dependent Claim
107 words
Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2 . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses.
Claim 27
Dependent Claim
201 words
Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2, . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses, wherein f 1.0, f1,2,3 0.392 and f3 2.176; and wherein r1 to r10, d1 to d9, n1 to n5 and Nu 1 to Nu 5 are defined by the following values: r1 0.3847 d1 0.0392 n1 1.63854 Nu 1 55.38 r2 1.5003 d2 0.0007 r3 0.3465 d3 0.0317 n2 1.617 Nu 2 62.79 r4 0.5969 d4 0.0025 r5 0.3748 d5 0.0638 n3 1.70154 Nu 3 41.1 r6 0.4620 d6 0.0260 r7 0.9685 d7 0.0409 n4 1.7847 Nu 4 26.22 r8 0.1957 d8 0.2758 r9 0.6435 d9 0.015 n5 1.80518 Nu 5 25.43 r10 1.8672
Claim 28
Dependent Claim
201 words
Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2, . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses, wherein f 1.0, f1,2,3 0.392 and f3 2.176; and wherein r1 to r10, d1 to d9, n1 to n5 and Nu 1 to Nu 5 are defined by the following values: r1 0.3847 d1 0.0392 n1 1.63854 Nu 1 55.38 r2 1.5003 d2 0.0007 r3 0.3465 d3 0.0317 n2 1.617 Nu 2 62.79 r4 0.5969 d4 0.0025 r5 0.3748 d5 0.0638 n3 1.70154 Nu 3 41.1 r6 0.4620 d6 0.0260 r7 0.9685 d7 0.0409 n4 1.7847 Nu 4 26.22 r8 0.1957 d8 0.2758 r9 0.6435 d9 0.015 n5 1.80518 Nu 5 25.43 r10 1.8672
Claim 29
Dependent Claim
201 words
Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2 . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses; wherein f 1.0, f1,2,3 0.407 and f3 2.0; and wherein r1 to r10, d1 to d9, n1 to n5 and Nu 1 to Nu 5 are defined by the following values: r1 0.4011 d1 0.0472 n1 1.58913 Nu 1 61.11 r2 2.3231 d2 0.0042 r3 0.3213 d3 0.0336 n2 1.56873 Nu 2 63.16 r4 0.5016 d4 0.0025 r5 0.3406 d5 0.0639 n3 1.70154 Nu 3 41.1 r6 0.4159 d6 0.0261 r7 0.8450 d7 0.0389 n4 1.7847 Nu 4 26.22 r8 0.1960 d8 0.2578 r9 0.6486 d9 0.0255 n5 1.7847 Nu 5 26.22 r10 1.7995.
Claim 30
Dependent Claim
201 words
Nu 1 > 50, Nu 2 > 50 and Nu 3 < 48 where f is a composite focal length of the total lens system, f3 is a focal length of the third components, f1,2,3 is a composite focal length of the first, second and third components, n1, n2 . . . n5 are refractive indices of the successive lenses counted from the object side, Nu 1, Nu 2, . . . Nu 5 are Abbe''s numbers of the successive lenses counted from the object side, and d1, d2, . . . d9 are axial thicknesses of the successive lenses or air spaces between the successive lenses; wherein f 1.0, f1,2,3 0.407 and f3 2.0; and wherein r1 to r10, d1 to d9, n1 to n5 and Nu 1 to Nu 5 are defined by the following values: r1 0.4011 d1 0.0472 n1 1.58913 Nu 1 61.11 r2 2.3231 d2 0.0042 r3 0.3213 d3 0.0336 n2 1.56873 Nu 2 63.16 r4 0.5016 d4 0.0025 r5 0.3406 d5 0.0639 n3 1.70154 Nu 3 41.1 r6 0.4159 d6 0.0261 r7 0.8450 d7 0.0389 n4 1.7847 Nu 4 26.22 r8 0.1960 d8 0.2578 r9 0.6486 d9 0.0255 n5 1.7847 Nu 5 26.22 r10 1.7995.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |