US3883230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephoto lens objective
Assignee: Carl Zeiss AG
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Filing: 1974-05-03
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Granted: 1975-05-13
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Expires: 1994-05-03
Abstract
Abstract The invention contemplates a telephoto-lens construction comprising four parts, one or more of which is a multiple-element part, and so devised as to achieve superior achromatic quality over a wide field of view, within a structural length which is less than the focal length. This result is achieved by following a particular schedule of regions from which to select optical glasses for the respective parts, or for the respective multiple elements of one or more of such parts, and by forming lens elements with such selected glasses in accordance with a particular schedule of refractive powers.
Inventors
- 👤 Fritz Determann
- 👤 Heinz Zajadatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:52
CPC Classifications
G; G02; G02B; G02B9/00; G02B13/00; G02B13/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
A photographic telephoto lens objective, comprising a converging first part facing the side of the longer light distance, a following diverging second part, a converging third part following at a greater distance away, and a final diverging fourth part, characterized by the fact that the optical materials for all lenses with the exception of associated lenses which are almost free of refractive power are selected from five ranges of the P** - P* presentation, in accordance with which:
Claim 2
Dependent Claim
78 words
A photographic telephoto lens objective, comprising a converging first part facing the side of the longer light distance, a following diverging second part, a converging third part following at a greater distance away, and a final diverging fourth part, characterized by the fact that the optical materials for all lenses with the exception of associated lenses which are almost free of refractive power are selected from five ranges of the P** - P* presentation, in accordance with which:
Claim 3
Dependent Claim
31 words
An objective lens according to claim 1, characterized by the fact that the third part consists of a lens of glass range 4 and having a refractive power proportional to D.
Claim 4
Dependent Claim
56 words
An objective lens according to claim 1, characterized by the fact that the third part consists of a first lens element of glass range 4 with a refractive power proportional to D1 and a second lens element of glass range 3 with a refractive power proportional to D2, in such manner that D1 + D2 D.
Claim 5
Dependent Claim
90 words
An objective lens according to claim 1, characterized by the fact the third part consists of a first lens element of glass range 4 with a refractive power proportional to D1, a following meniscus element which is substantially without refractive power and is arched towards the light, said meniscus element being of glass range 3 with a refractive power proportional to D2, and a following lens element of material from glass range 2 with a refractive power proportional to D3, in such manner that D1 + D2 + D3 D.
Claim 6
Dependent Claim
19 words
An objective lens according to claim 1, in which adjacent elements of a given multiple-element part are bonded together.
Claim 7
Dependent Claim
51 words
An objective lens according to claim 1, in which one of said parts further includes an associated element of relatively low refractive power and of a material selected from a range other than the range stated for said one part, said selected range being one of the five above-defined glass ranges.
Claim 8
Dependent Claim
27 words
An objective lens according to claim 1, in which two parts of the objective lens comprise adjacent multiple elements, each of which is of a different glass.
Claim 9
Dependent Claim
25 words
An objective lens according to claim 1, characterized by the fact that its structural data correspond to the values set forth in the following table:
Claim 10
Dependent Claim
25 words
An objective lens according to claim 1, characterized by the fact that its structural data correspond to the values set forth in the following table:
Claim 11
Dependent Claim
25 words
An objective lens according to claim 1, characterized by the fact that its structural data correspond to the values set forth in the following table:
Claim 12
Dependent Claim
25 words
An objective lens according to claim 1, characterized by the fact that its structural data correspond to the values set forth in the following table:
Claim 13
Dependent Claim
31 words
An objective lens according to claim 1, in which one of the parts of the objective lens comprises at least three elements, each of which elements is of a different glass.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |