US3926504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic objective
Assignee: Bell and Howell Co
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Filing: 1974-06-21
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Granted: 1975-12-16
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Expires: 1994-06-21
Abstract
Abstract The photographic objective comprises a plurality of individual lens elements, only one or two of which being movable for focusing purposes. The other lens elements have fixed positions relative to each other and to the film plane. In a preferred embodiment, the objective comprises five lens elements, only the middle one of which is movable for focusing purposes.
Inventors
- 👤 Andor A Fleischman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:25
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/18; G02B9/00; G02B9/60
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 2
Dependent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 3
Dependent Claim
24 words
The photographic objective set forth in claim 1, wherein the surface represented by the radius R9 is aspheric in accordance with the following formula:
Claim 4
Dependent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 5
Dependent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 6
Dependent Claim
18 words
The photographic objective set forth in claim 3, wherein R9 is aspheric in accordance with the following formula:
Claim 7
Dependent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, aNd first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 8
Dependent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, aNd first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 9
Dependent Claim
24 words
The photographic objective set forth in claim 5, wherein the surface represented by the radius R9 is aspheric in accordance with the following formula:
Claim 10
Dependent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 11
Dependent Claim
73 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, fourth, and fifth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 12
Dependent Claim
24 words
The photographic objective set forth in claim 7, wherein the surface represented by the radius R9 is aspheric in accordance with the following formula:
Claim 13
Dependent Claim
85 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, and fourth lens lens elements arranged on a lens axis, said first, second, and fourth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
Claim 14
Dependent Claim
85 words
A photographic objective for focusing light from an object onto a receiving medium, comprising mounting structure, and first, second, third, and fourth lens lens elements arranged on a lens axis, said first, second, and fourth lens elements being fixedly attached in use to said mounting structure, said third lens element being movably carried by said mounting structure and being movable with respect thereto along said lens axis for focusing light from the object onto the receiving medium, constructed substantially in accordance with the following specifications:
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |