US3759606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High magnification projection lens
Assignee: CAMBRIDGE INSTRUMENTS Inc A DEL CORP
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Filing: 1972-09-05
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Granted: 1973-09-18
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Expires: 1992-09-05
Abstract
Abstract An inverse telephoto lens having ten elements, none in contact, is useful as a microfilm projection or camera lens, having a magnification ratio of 180:1 and numerical aperture of 0.42.
Inventors
- 👤 Orden L Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:45
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/04; G02B13/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
283 words
An inverted telephoto lens having 10 elements in two groups, none of said elements being in contact with one another, said elements having values of radii R which are negative when centered toward the short conjugate, thicknesses t and spaces S ratioed to the focal length f as unity, said elements comprising glasses of refractive indices nD and dispersions upsilon , all of said values being subnumerated in increasing order from the short conjugate toward the long, and said values lying within the ranges set forth in the table below: 2.362f -R1 2.516f -60f R2 + OR - 60f -60f R3 + OR - 60f 2.018f -R4 2.024f 54.235f R5 54.417f 2.997f -R6 3.007f 2.997f -R7 3.007f 6.109f R8 6.130f 6.634f R9 6.657f 5.5980f -R10 6.000f 5.501f R11 5.519f 10.146f -R12 10.180f 7.098f -R13 7.173f 21.023f -R14 22.045f 1.662f -R15 1.674f 3.467f -R16 3.804f 2.485f -R17 2.605f -17.343f R18 60f -60f R19 35.265f 4.753f -R20 5.106f 0.569f t1 0.571f 1.474f t2 1.479f 0.720f t3 0.722f 0.308f t4 0.309f 1.499f t5 0.501f 0.521f t6 0.523f 0.310f t7 0.311f 0.280f t8 0.281f 0.359f t9 0.361f 0.599f t10 0.601f 0.019f S1 0.020f 0.013f S2 0.014f 0.064f S3 0.065f 0.135f S4 0.136f 0.018f S5 0.019f 0.073f S6 0.089f 7.046f S7 7.127f 1.632f S8 1.754f 0.009f S9 0.010f 1.618 nD1 1.622 1.618 nD2 1.622 1.718 nD3 1.722 1.689 nD4 1.693 1.689 nD5 1.693 1.718 nD6 1.722 1.689 nD7 1.693 1.689 nD8 1.693 1.718 nD9 1.722 1.524 nD10 1.528 58.2 Nu 1 62.2 58.2 Nu 2 62.2 27.3 Nu 3 31.3 52.8 Nu 4 56.8 52.8 Nu 5 56.8 27.3 Nu 6 31.3 52.8 Nu 7 56.8 52.8 Nu 8 56.8 27.3 Nu 9 31.3 58.0 Nu 10 62.0
Claim 2
Dependent Claim
283 words
An inverted telephoto lens having 10 elements in two groups, none of said elements being in contact with one another, said elements having values of radii R which are negative when centered toward the short conjugate, thicknesses t and spaces S ratioed to the focal length f as unity, said elements comprising glasses of refractive indices nD and dispersions upsilon , all of said values being subnumerated in increasing order from the short conjugate toward the long, and said values lying within the ranges set forth in the table below: 2.362f -R1 2.516f -60f R2 + OR - 60f -60f R3 + OR - 60f 2.018f -R4 2.024f 54.235f R5 54.417f 2.997f -R6 3.007f 2.997f -R7 3.007f 6.109f R8 6.130f 6.634f R9 6.657f 5.5980f -R10 6.000f 5.501f R11 5.519f 10.146f -R12 10.180f 7.098f -R13 7.173f 21.023f -R14 22.045f 1.662f -R15 1.674f 3.467f -R16 3.804f 2.485f -R17 2.605f -17.343f R18 60f -60f R19 35.265f 4.753f -R20 5.106f 0.569f t1 0.571f 1.474f t2 1.479f 0.720f t3 0.722f 0.308f t4 0.309f 1.499f t5 0.501f 0.521f t6 0.523f 0.310f t7 0.311f 0.280f t8 0.281f 0.359f t9 0.361f 0.599f t10 0.601f 0.019f S1 0.020f 0.013f S2 0.014f 0.064f S3 0.065f 0.135f S4 0.136f 0.018f S5 0.019f 0.073f S6 0.089f 7.046f S7 7.127f 1.632f S8 1.754f 0.009f S9 0.010f 1.618 nD1 1.622 1.618 nD2 1.622 1.718 nD3 1.722 1.689 nD4 1.693 1.689 nD5 1.693 1.718 nD6 1.722 1.689 nD7 1.693 1.689 nD8 1.693 1.718 nD9 1.722 1.524 nD10 1.528 58.2 Nu 1 62.2 58.2 Nu 2 62.2 27.3 Nu 3 31.3 52.8 Nu 4 56.8 52.8 Nu 5 56.8 27.3 Nu 6 31.3 52.8 Nu 7 56.8 52.8 Nu 8 56.8 27.3 Nu 9 31.3 58.0 Nu 10 62.0
Claim 3
Dependent Claim
153 words
The lens of claim 1 having substantially the construction data set forth in the table below: -R1 2.516f t1 0.571f R2 + or - 60f t2 1.479f R3 + or - 60f t3 0.722f -R4 2.024f t4 0.309f R5 54.417f t5 0.501f -R6 3.007f t6 0.523f -R7 3.007f t7 0.311f R8 6.130f T8 0.281f R9 6.657f t9 0.361f -R10 6.000f t10 0.601f R11 5.519f S1 0.019f -R12 10.180 S2 0.014f -R13 7.173f S3 0.065f -R14 22.045f S4 0.136f -R15 1.666f S5 0.019f -R16 3.804f S6 0.073f -R17 2.485f S7 7.126f R18 -17.343f S8 1.632f R19 + or - 60f S9 0.010f -R20 4.753f nD1 1.620 Nu 1 60.2 nD2 1.620 Nu 2 60.2 nD3 1.720 Nu 3 29.3 nD4 1.691 Nu 4 54.8 nD5 1.691 Nu 5 54.8 nD6 1.720 Nu 6 29.3 nD7 1.691 Nu 7 54.8 nD8 1.691 Nu 8 54.8 nD9 1.720 Nu 9 29.3 nD10 1.526 Nu 10 60.0
Claim 4
Dependent Claim
153 words
The lens of claim 1 having substantially the construction data set forth in the table below: -R1 2.362f t1 0.569f R2 + or - 60f t2 1.476f R3 + or - 60f t3 0.721f -R4 2.020f t4 0.309f R5 54.292f t5 0.500f -R6 3.000f t6 0.521f -R7 3.000f t7 0.310f R8 6.116f t8 0.280f R9 6.641f t9 0.360f -R10 5.987f t10 0.600f R11 5.507f S1 0.020f -R12 10.156f S2 0.014f -R13 7.116f S3 0.065f -R14 21.023f S4 0.136f -R15 1.674f S5 0.019f -R15 3.467f S6 0.089f -R17 2.602f S7 7.083f R18 + or - 60f S8 1.754f R19 35.265f S9 0.010f -R20 5.106f nD1 1.620 Nu 1 60.2 nD2 1.620 Nu 2 60.2 nD3 1.720 Nu 3 29.3 nD4 1.691 Nu 4 54.8 nD5 1.691 Nu 5 54.8 nD6 1.720 Nu 6 29.3 nD7 1.691 Nu 7 54.8 nD8 1.691 Nu 8 54.8 nD9 1.720 Nu 9 29.3 nD10 1.526 Nu 10 60.0
Claim 5
Dependent Claim
153 words
The lens of claim 1 having substantially the construction data set forth in the table below: -R1 2.491f t1 0.569f R2 + or - 60f t2 1.474f R3 + or - 60f t3 0.720f -R4 2.018f t4 0.308f R5 54.235f t5 0.499f -R6 2.997f t6 0.521f -R7 2.997f t7 0.310f R8 6.109f t8 0.280f R9 6.634f t9 0.359f -R10 5.980f t10 0.599f R11 5.501f S1 0.020f -R12 10.146f S2 0.014f -R13 7.098f S3 0.065f -R14 21.882f S4 0.135f -R15 1.662f S5 0.018f -R16 3.563f S6 0.089f -R17 2.605f S7 7.127f R18 -33.440f S8 1.725f R19 + or - 60f S9 0.010f -R20 5.093f nD1 1.620 Nu 1 60.2 nD2 1.620 Nu 2 60.2 nD3 1.720 Nu 3 29.3 nD4 1.691 Nu 4 54.8 nD5 1.691 Nu 5 54.8 nD6 1.720 Nu 6 29.3 nD7 1.691 Nu 7 54.8 nD8 1.691 Nu 8 54.8 nD9 1.720 Nu 9 29.3 nD10 1.526 Nu 10 60.0
Claim 6
Dependent Claim
153 words
The lens of claim 1 having substantially the construction data set forth in the table below: -R1 2.447f t1 0.569f R2 + or - 60f t2 1.474f R3 + or - 60f t3 0.720f -R4 2.018f t4 0.308f R5 54.242f t5 0.499f R6 2.997f t6 0.521f -R7 2.997f t7 0.310f R8 6.110f t8 0.280f R9 6.635f t9 0.360f -R10 5.981f t10 0.599f R11 5.502f S1 0.020f -R12 10.147f S2 0.014f -R13 7.141f S3 0.065f -R14 21.536f S4 0.135f -R15 1.673f S5 0.018f -R16 3.700f S6 0.089f -R17 2.557f S7 7.046f R18 -27.281f S8 1.754f R19 + or - 60f S9 0.010f -R20 4.860f nD1 1.620 Nu 1 60.2 nD2 1.620 Nu 2 60.2 nD3 1.720 Nu 3 29.3 nD4 1.691 Nu 4 54.8 nD5 1.691 Nu 5 54.8 nD6 1.720 Nu 6 29.3 nD7 1.691 Nu 7 54.8 nD8 1.691 Nu 8 54.8 nD9 1.720 Nu 9 29.3 nD10 1.526 Nu 10 60.0
References Cited (Backward Citations)
US3656839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |