US4329578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical imaging system having variable focal length
Assignee: Rollei Werke Franke und Heidecke GmbH and Co KG
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Filing: 1980-06-06
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Granted: 1982-05-11
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Expires: 2000-06-06
Abstract
Abstract An imaging system, particularly for application in a camera with a zoom lens, having at least two lenses with variable distance from a fixed image plane, means for adjusting one of the lenses for setting the resultant focal length of the system, and automatic means for adjusting the position of the other lens, or of the entire lens system including any other lenses, by means of a focus determining element in the fixed image plane.
Inventors
- 👤 Ortwin Rosner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:11
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/282; G02B15/00; G02B15/14; G02B15/142
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
130 words
An optical imaging system of variable focal length including a lens system (11) for forming an image in a fixed image plane (10) with at least two series-connected lens components (12, 13) located along the optical axis, the positions of the two lens components (12, 13) being variable, and including an adjusting device (14) for setting the focal length of the lens system (11), said imaging system comprising said adjusting device (14) comprising means for acting on one of the two lens components (12, 13) independently of the other of said two lens components (13, 12), and a focusing device (15) coupled at least with the other one of said lens components (13, 12) to focus the lens system (11) to form a sharp image on the image plane (10).
Claim 2
Dependent Claim
130 words
An optical imaging system of variable focal length including a lens system (11) for forming an image in a fixed image plane (10) with at least two series-connected lens components (12, 13) located along the optical axis, the positions of the two lens components (12, 13) being variable, and including an adjusting device (14) for setting the focal length of the lens system (11), said imaging system comprising said adjusting device (14) comprising means for acting on one of the two lens components (12, 13) independently of the other of said two lens components (13, 12), and a focusing device (15) coupled at least with the other one of said lens components (13, 12) to focus the lens system (11) to form a sharp image on the image plane (10).
Claim 3
Dependent Claim
41 words
The imaging system of claim 1, said focusing device (15) comprising automatic focusing means for coupling both said two series connected lens components (12, 13) to control the position of at least said other one of said lens components (13, 12).
Claim 4
Dependent Claim
76 words
The imaging system of claim 1, the focusing device (15) comprising at least one photosensitive sensor (16) arranged in the image plane (10), a final controlling element (18) acting selectively on at least said other one of the two lens components (13, 12) that is not adjusted by said adjusting device (14), and a regulator (17) for selectively actuating the final controlling element (18) as a function at least of a signal from the sensor (16).
Claim 5
Dependent Claim
75 words
The imaging system of claim 2, the focusing device (15) comprising at least one photosensitive sensor (16) arranged in the image plane (10), a final controlling element (18) acting selectively on at least said other of the two lens components (13, 12) that is not adjusted by said adjusting device (14), and a regulator (17) for selectively actuating the final controlling element (18) as a function at least of a signal from the sensor (16).
Claim 6
Dependent Claim
18 words
The imaging system of claim 1, 2, 3 or 4 comprising an imaging system for a movie camera.
Claim 7
Dependent Claim
15 words
The imaging system of claim 1, 2, 3 or 4 comprising means for optical compensation.
Claim 8
Dependent Claim
15 words
The imaging system of claim 1, 2, 3 or 4 comprising means for mechanial compensation.
Claim 9
Dependent Claim
17 words
The imaging system of claim 1, 2, 3 or 4, said focusing device (15) comprising a rangefinder.
Claim 10
Dependent Claim
20 words
The imaging system of claim 1, 2, 3 or 4, said focusing detector (15) comprising a travel time measuring device.
Claim 11
Dependent Claim
33 words
The imaging system of claim 1, 2, 3 or 4, said adjusting device (14) acting on the one of said two series-connected lens components (13) that is closest to said image plane (10).
Claim 12
Dependent Claim
33 words
The imaging system of claim 1, 2, 3 or 4, said adjusting device (14) acting on the one of said two series-connected lens components (12) that is farthest from said image plane (10).
Claim 13
Dependent Claim
66 words
The imaging system of claim 1, 2, 3 or 4, said lens system (11) comprising at least one additional series-connected lens component (20) located along said optical axis, each said additional lens component (20) being fixed at a predetermined position within said lens system (11), the positions of at least one of said two series-connected lens components (12, 13) being variable within said lens system (11).
Claim 14
Dependent Claim
29 words
The imaging system of claim 3 or 4, said regulator (17) activating the final controlling element (18) also as a function of a manual set control on said regulator.
Claim 15
Dependent Claim
25 words
The imaging system of claim 3 or 4, said photosensitive sensor (16) being located in a plane that is conjugate to said image plane (10).
References Cited (Backward Citations)
US4083057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |