US3989317A
Expired / Lapsed
US
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Objective lens system
Assignee: Olympus Corp
•
Filing: 1975-02-12
•
Granted: 1976-11-02
•
Expires: 1995-02-12
Abstract
Abstract Achromat objective lens systems and more particularly an objective lens system having a magnification β on the order of 10 to 30X and designed to operate particularly for the monochromatic light whose wave length is on the order of 6328 A. The lens system consists of three lens components and four lenses. The first and second lens components are positive singlet lenses. The third lens component is a positive doublet lens composed of a negative meniscus lens and a biconvex lens. The lens system is constructed so as to satisfy the following three conditions: ______________________________________ 0.9f<d 2 +d 3 +d 4 <1.3f (1) 0.8f<R 6 <1.2f (2) 1.46<n 1d <1.65 1.46<n 2d <1.65 1.46<n 4d <1.65 50<ν 1d <68 (3) 50<ν 2d <68 50<ν 4d <68 ν 3d <35 ______________________________________ Wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively.
Inventors
- 👤 Haruo Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:13
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02; G02B9/00; G02B9/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
384 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e., ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n .sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens system being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.6376
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.6053
d.sub.2 0.2623
R.sub.3 ∞
L.sub.2 d.sub.3 0.3195
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.7969
d.sub.4 0.5483
R.sub.5 2.0655
L.sub.3 d.sub.5 0.1074
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.8774
L.sub.4 d.sub.6 0.4897
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -4.5120
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
Claim 2
Dependent Claim
384 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e., ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n .sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens system being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.6376
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.6053
d.sub.2 0.2623
R.sub.3 ∞
L.sub.2 d.sub.3 0.3195
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.7969
d.sub.4 0.5483
R.sub.5 2.0655
L.sub.3 d.sub.5 0.1074
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.8774
L.sub.4 d.sub.6 0.4897
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -4.5120
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
Claim 3
Dependent Claim
382 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e., ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n.sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.6046
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.6117
d.sub.2 0.2492
R.sub.3 ∞
L.sub.2 d.sub.3 0.3037
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.6790
d.sub.4 0.5202
R.sub.5 2.6723
L.sub.3 d.sub.5 0.1716
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.9532
L.sub.4 d.sub.6 0.3976
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -2.5604
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
Claim 4
Dependent Claim
382 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e., ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n.sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.6046
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.6117
d.sub.2 0.2492
R.sub.3 ∞
L.sub.2 d.sub.3 0.3037
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.6790
d.sub.4 0.5202
R.sub.5 2.6723
L.sub.3 d.sub.5 0.1716
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.9532
L.sub.4 d.sub.6 0.3976
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -2.5604
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
Claim 5
Dependent Claim
382 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e. ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n.sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens system being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.4707
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.5814
L.sub.2 d.sub.2 0.3696
R.sub.3 ∞
d.sub.3 0.3087
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.3724
d.sub.4 0.5039
R.sub.5 2.9667
L.sub.3 d.sub.5 0.1744
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.9685
d.sub.6 0.3212
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -2.1257
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
Claim 6
Dependent Claim
382 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e. ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n.sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens system being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.4707
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.5814
L.sub.2 d.sub.2 0.3696
R.sub.3 ∞
d.sub.3 0.3087
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.3724
d.sub.4 0.5039
R.sub.5 2.9667
L.sub.3 d.sub.5 0.1744
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.9685
d.sub.6 0.3212
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -2.1257
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
Claim 7
Dependent Claim
383 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e. ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n.sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens system being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.486
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.561
d.sub.2 0.411
R.sub.3 ∞
L.sub.2 d.sub.3 0.390
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.345
d.sub.4 0.359
R.sub.5 2.332
L.sub.3 d.sub.5 0.211
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.885
L.sub.4 d.sub.6 0.378
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -2.101
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
Claim 8
Dependent Claim
383 words
An objective lens system comprising three airspaced lens components which are optically aligned with each other and arranged in succession from the object side of the system, the first two lens components being positive singlets, respectively, and the third lens component being a positive doublet, and said system satisfying the following three conditions, i.e. ______________________________________
0.9f<d.sub.2 +d.sub.3 +d.sub.4 <1.3f
(1)
0.8f<R.sub.6 <1.2f (2)
1.46<n.sub.1d <1.65
1.46<n.sub.2d <1.65
1.46<n.sub.4d <1.65
50<ν.sub.1d <68 (3)
50<ν.sub.2d <68
50<ν.sub.4d <68
ν.sub.3d <35
______________________________________ wherein f designates the overall focal length of the system given for a wave length light of 6328 A, R 6 designates the radius of curvature of the cemented surface of the third lens component, d 2 and d 4 designate the separation between the first and second lens components and the separation between the second and third lens components, respectively, d 3 designates the axial thickness of the second lens component, n 1d , n 2d and n 4d designate the refractive indices of the first, second and fourth lenses for the d line, respectively, and ν 1d , ν 2d , ν 3d and ν 4d designate the Abbe numbers of the first, second, third and fourth lenses for the d line, respectively, the objective lens system being constructed according to the following constructional data: ______________________________________
Thicknesses
and
Lens Radii separations n.sub.d ν.sub.d
______________________________________
R.sub.1 ∞
L.sub.1 d.sub.1 0.486
n.sub.1d 1.51633
ν.sub.1d 64.1
R.sub.2 -0.561
d.sub.2 0.411
R.sub.3 ∞
L.sub.2 d.sub.3 0.390
n.sub.2d 1.51633
ν.sub.2d 64.1
R.sub.4 -1.345
d.sub.4 0.359
R.sub.5 2.332
L.sub.3 d.sub.5 0.211
n.sub.3d 1.74077
ν.sub.3d 27.8
R.sub.6 0.885
L.sub.4 d.sub.6 0.378
n.sub.4d 1.51633
ν.sub.4d 64.1
R.sub.7 -2.101
______________________________________ wherein R 1 to R 7 inclusive designate the lens curvatures, d 1 , d 3 , d 5 and d 6 designate the axial thicknesses of the first, second, third and fourth lenses, respectively, d 2 and d 4 designate the space between the first and second lenses and the space between the second and third lenses, respectively, n 1d to n 4d inclusive designate the refractive indices of the glass for the d line of the spectrum for the respective lenses and ν 1d to ν 4d inclusive designate the Abbe numbers of the lenses for the d line numbering from the front to the rear of said system.
References Cited (Backward Citations)
US3272072A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |