US3613544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system
Assignee: Canon Inc
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Filing: 1970-06-24
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Granted: 1971-10-19
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Expires: 1990-06-24
Abstract
Abstract A focusing arrangement for a lens system. Two mutually independent focusing mechanisms, one of which is associated with a normal range and the other a macrophotographic range are cooperatively connected to an adjusting device for at least one optical element. The optical system has substantially different optical responses to the operation of the normal and macrophotographic range focusing mechanisms.
Inventors
- 👤 Hanns Plihal
- 👤 Gerhard Rothy
- 👤 Josef Schild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:21
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B7/105; G03; G03B; G03B3/00
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
125 words
An optical system, which comprises optically effective means movable to focus said optical system for different distances, setting means connected to said optically effective means and operable to move the same so as to focus said optical system for distances within and outside a macrophotographic range, a normal range focusing mechanism operatively connected to said setting means and operable to focus said optical system for distances outsIde said macrophotographic range, and a near range focusing mechanism operatively connnected to said setting means and operable to focus said optical system for a distance within said macrophotographic range, said focusing mechanisms being operable independently of each other, said optical system having substantially different optical responses to the operation of said normal range and near range focusing mechanisms.
Claim 2
Dependent Claim
125 words
An optical system, which comprises optically effective means movable to focus said optical system for different distances, setting means connected to said optically effective means and operable to move the same so as to focus said optical system for distances within and outside a macrophotographic range, a normal range focusing mechanism operatively connected to said setting means and operable to focus said optical system for distances outsIde said macrophotographic range, and a near range focusing mechanism operatively connnected to said setting means and operable to focus said optical system for a distance within said macrophotographic range, said focusing mechanisms being operable independently of each other, said optical system having substantially different optical responses to the operation of said normal range and near range focusing mechanisms.
Claim 3
Dependent Claim
14 words
An optical system as set forth in claim 1, which constitutes a camera lens.
Claim 4
Dependent Claim
21 words
An optical system as set forth in claim 1, in which said optically effective means consist of one optically effective element.
Claim 5
Dependent Claim
63 words
An optical system as set forth in claim 1, which comprises zooming means operable to change the focal length of said system and in unison therewith to operate said near range-focusing mechanism, means operable to move said near range focusing mechanism in dependence on the position of said zooming means, and motor means operable to move at least one of said focusing mechanisms.
Claim 6
Dependent Claim
23 words
An optical system as set forth in claim 4, in which said near range focusing mechanism is operatively connected to said zooming means.
Claim 7
Dependent Claim
77 words
An optical system as set forth in claim 5, which comprises a first cam section forming part of said zooming means and a second cam section forming part of said near range focusing mechanism, said first and second cam sections being formed by a single cam structure, in which said second cam section adjoins said first cam section, a cam follower is operatively connected to said setting means and engageable with said first and second cam sections.
Claim 8
Dependent Claim
44 words
An optical system as set forth in claim 6, in which said first cam section comprises a wide-angle portion arranged to be engaged by said cam follower when said optical system is in a position and said second cam section adjoins said wide-angle portion.
Claim 9
Dependent Claim
21 words
An optical system as set forth in claim 6, in which said cam structure is positively engaged by said cam follower.
Claim 10
Dependent Claim
49 words
An optical system as set forth in claim 6, in which said second cam section is engageable with said cam follower, and means are provided for maintaining a fixed focal length of said optical system during a movement of said cam follower in engagement with said second cam section.
Claim 11
Dependent Claim
32 words
An optical system as set forth in claim 6, which comprises releasable locking means adapted to prevent a movement of said cam follower along said second cam section in a predetermined direction.
Claim 12
Dependent Claim
34 words
An optical system as set forth in claim 10, in which said locking means are adapted to prevent a movement of said cam follower along said second cam section only in said predetermined direction.
Claim 13
Dependent Claim
82 words
An optical system as set forth in claim 10, in which said cam follower is movable to an initial position, in which it is disengaged from said second cam section, and which comprises release means operable to move said locking means to a release position, and detent means arranged to hold said locking means in said release position and to release said locking means in response to a movement of said cam follower from said second cam section to said initial position.
Claim 14
Dependent Claim
17 words
An optical system as set forth in claim 12, in which said release means comprise a pushbutton.
Claim 15
Dependent Claim
44 words
An optical system as set forth in claim 12, in which said cam follower is arranged directly to engage said detent means to cause it to release said locking means as said cam follower moves from said second cam section to said initial position.
Claim 16
Dependent Claim
50 words
An optical system as set forth in claim 12, which comprises a release member which is connected to said cam follower and arranged to engage said detent means to cause it to release said locking means as said cam follower moves from said second cam section to said initial position.
Claim 17
Dependent Claim
50 words
An optical system as set forth in claim 12, which constitutes a lens having a forward end portion and adapted to carry a titler, said release means beIng mounted on said forward end portion and adapted to be operated by a titler as the latter is applied to said lens.
Claim 18
Dependent Claim
25 words
An optical system as set forth in claim 12, which comprises indicating means adapted to indicate that said locking means is in a released condition.
Claim 19
Dependent Claim
28 words
An optical system as set forth in claim 17, which is incorporated in a camera having a viewfinder in which said indicating means are visible in said condition.
Claim 20
Dependent Claim
121 words
An optical system as set forth in claim 1, in which a zooming cam is provided, which is formed with a zooming cam face defining a zooming cam slot, said focusing mechanisms comprise a focusing cam, a cam follower is connected to said setting means and adapted to be positively engaged with said zooming cam face and said focusing cam, said focusing cam is operable to disengage said cam follower from said zooming cam face to a predetermined maximum lift, said zooming cam is operable to change the focal length of said optical system, and said zooming cam slot has an enlarged portion, which permits of a disengagement of said cam follower from said zooming cam face to said maximum lift.
Claim 21
Dependent Claim
32 words
An optical system as set forth in claim 19, in which said zooming cam slot has a constricted portion and said enlarged portion opens at an obtuse angle into said constricted portion.
Claim 22
Dependent Claim
19 words
An optical system as set forth in claim 19, in which said zooming cam slot consists of a groove.
Claim 23
Dependent Claim
36 words
An optical system as set forth in claim 19, in which said optical system defines an optical axis, said focusing cam to movable in said plane, and said cam follower is rigid with said setting means.
Claim 24
Dependent Claim
19 words
An optical system as set forth in claim 22, in which said focusing cam is rotatable in said plane.
Claim 25
Dependent Claim
19 words
An optical system as set forth in claim 22, in which said focusing cam is displaceable in said plane.
Claim 26
Dependent Claim
28 words
An optical system as set forth in claim 22, which comprises a housing and a support carrying said focusing cam and at least partly protruding from said housing.
Claim 27
Dependent Claim
17 words
An optical system as set forth in claim 25, in which said support consists of a disc.
Claim 28
Dependent Claim
64 words
An optical system as set forth in claim 19, in which said zooming cam slot comprises a constricted portion, locking means for locking said focusing cam in position are arranged to be released in response to a movement of said constricted portion, and a return spring is operatively connected to said focusing cam and tends to return the same to a predetermined initial position.
Claim 29
Dependent Claim
18 words
An optical system as set forth in claim 27, in which said locking means comprise a friction brake.
Claim 30
Dependent Claim
39 words
An optical system as set forth in claim 27, in which said cam follower is arranged directly to engage said locking means to release the same as said cam follower moves from said enlarged portion to said constricted portion.
Claim 31
Dependent Claim
45 words
An optical system as set forth in claim 27, which comprises a release member, which is connected to said cam follower and arranged to engage said locking means to release the same as said cam follower moves from said enlarged portion to said constricted portion.
Claim 32
Dependent Claim
36 words
An optical system as set forth in claim 19, which comprises indicating means connected to said focusing cam and arranged to indicate a condition in which said focusing cam is out of a predetermined initial position.
Claim 33
Dependent Claim
28 words
An optical system as set forth in claim 31, which is incorporated in a camera having a viewfinder in which said indicating means are visible in said condition.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |