US3655260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simulator having an infinite-depth-of-field optical pickup
Assignee: Lockheed Martin Tactical Systems Inc
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Filing: 1970-07-24
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Granted: 1972-04-11
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Expires: 1990-07-24
Abstract
Abstract An optical pickup having a final imaging lens with means for tilting the final lens about its rear nodal point to maintain registration of the optimum image plane resulting from varying object plane orientations. This technique increases the depth of field without affecting the f-number of the optical pickup system or introducing distortions.
Inventors
- 👤 John F Bartucci
- 👤 James A Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:06
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/32; G09B9/326; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
202 words
An optical pickup which comprises an objective lens, a focusing lens, a final imaging lens and means mounting the final imaging lens to tilt it in all planes about an axis through its rear nodal point where the focus lens and the final imaging lens are arranged with respect to each other so that the final image height on the final image plane is directly proportional to the input image height under all tilt conditions and where the objective lens is characterized by the following magnitudes: (all dimensions in inches) Surface Radius Thickness Nd V-no 1 - 1.8258 0.025 1.691 54.71 2 0.25 0.053 1.0 - 3 infinity 0.29 1.691 54.71 4 - 0.4739 0.02 1.0 - 5 infinity 0.42 1.62041 60.33 6 infinity 0.0313 1.0 - 7 2.697 0.12 1.62041 60.33 8 - 0.5397 0.01 1.0 - 9 0.8129 0.1311 1.7552 27.58 10 - 2.1109 0.01 1.0 - 11 33.228 0.1178 1.62041 60.33 12 0.5364 0.1042 1.0- 13 19.416 0.14 1.62041 60.33 14 - 0.5367 0.0551 1.0 - 15 - 0.401 0.08 1.62004 36.37 16 - 0.9542 0.9287 1.0 - 17 1.5432* 0.33 1.62041 60.33 18 - 1.2821 0.125 1.64769 33.85 19 - 5.4025 c surface curvature y height off axis
Claim 2
Dependent Claim
202 words
An optical pickup which comprises an objective lens, a focusing lens, a final imaging lens and means mounting the final imaging lens to tilt it in all planes about an axis through its rear nodal point where the focus lens and the final imaging lens are arranged with respect to each other so that the final image height on the final image plane is directly proportional to the input image height under all tilt conditions and where the objective lens is characterized by the following magnitudes: (all dimensions in inches) Surface Radius Thickness Nd V-no 1 - 1.8258 0.025 1.691 54.71 2 0.25 0.053 1.0 - 3 infinity 0.29 1.691 54.71 4 - 0.4739 0.02 1.0 - 5 infinity 0.42 1.62041 60.33 6 infinity 0.0313 1.0 - 7 2.697 0.12 1.62041 60.33 8 - 0.5397 0.01 1.0 - 9 0.8129 0.1311 1.7552 27.58 10 - 2.1109 0.01 1.0 - 11 33.228 0.1178 1.62041 60.33 12 0.5364 0.1042 1.0- 13 19.416 0.14 1.62041 60.33 14 - 0.5367 0.0551 1.0 - 15 - 0.401 0.08 1.62004 36.37 16 - 0.9542 0.9287 1.0 - 17 1.5432* 0.33 1.62041 60.33 18 - 1.2821 0.125 1.64769 33.85 19 - 5.4025 c surface curvature y height off axis
Claim 3
Dependent Claim
46 words
A pickup according to claim 1 which includes a derotation, or roll, prism between the final imaging lens and the final imaging plane and where the focus lens Surface Radius Thickness Nd V-no 1 10.969 0.1562 1.64769 33.85 2 3.6592 0.3 1.55963 61.21 3 - 7.9847
Claim 4
Dependent Claim
115 words
An optical system according to claim 1 where the objective lens covers more than 80* full field, and has less than 10 percent barrel distortion at the field edge, while, at the same time, is telecentric, and where the final imaging lens Surface Radius Thickness Nd V-no 1 2.4012 0.5 1.62041 60.33 2 5.9011 0.01 1.0 - 3 2.3670 0.3 1.65844 50.88 4 3.76 0.152 1.66998 39.20 5 1.5776 1.0907 1.0 - 6 - 4.4485 0.15 1.62041 60.33 7 -4.2979 0.7592 1.0 - 8 - 1.5654 0.2 1.64769 33.85 9 -5.9177 0.51 1.67003 47.11 10 - 2.1961 0.01 1.0 - 11 -11.804 0.55 1.62041 60.33 12 - 3.5166 Aperture stop 0.65 inches before surface 6
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |