US3765748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for relative adjustment of axially spaced lens components
Assignee: Individual
•
Filing: 1972-09-01
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Granted: 1973-10-16
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Expires: 1992-09-01
Abstract
Abstract In a lens system in which a basic lens component mounted fixedly on a fixed frame, two lens components movable along the optical axis for changing the magnification, and a lens component movable along the optical axis for focusing are axially spaced, a mechanism for relative adjustment of the axially spaced lens components comprising an operating cylinder fitted on the fixed frame to be axially movable and rotatable about the optical axis, the axial movement of said operating cyiinder moving two lens components for changing the magnification, keeping the focusing lens components immovable relative to the basic lens component, to set the magnification of the lens system, and the rotation of said operating cylinder moving only the focusing lens component, keeping two lens components for changing the magnification immovable relative to the basic lens component, to set the focusing of the lens system.
Inventors
- 👤 H Mito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:21
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B15/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
322 words
A mechanism for relative adjustment of axially spaced lens components comprising: a fixed frame mounting a basic lens component disposed nearest the image side of said axially spaced lens components; cylindrical means extending from said fixed frame to the object side of said components, and having a guide slot on the periphery thereof and a threaded ring for forming part of a helicoid mechanism on the tip thereof; a threaded focusing ring engaged by said threaded ring and forming the other part of said helicoid mechanism, and having a focusing component frame for mounting a focusing lens component on the inner periphery thereof and an axial slot on the outer periphery thereof; a control cylinder fitted slidably on said cylindrical means and having a first spiral cam slot and a second spiral cam slot at least on the periphery thereof; a guide means in the form of a ring-shaped member interlocked with said control cylinder perpendicularly to the axis; an operating member fitted on said control cylinder and said focusing ring so as to cover at least a portion thereof and capable of rotation about the axis and axial displacement; a first guide member fixed to said operating member and slidable in said axial slot for transmitting only rotary motion about the axis to said focusing ring; a second guide member fixed to said operating member for cooperating with said ring-shaped guide means to transmit only the axial displacement of said operating member to said control cylinder; a zooming component frame for mounting a zooming lens component, fitted slidably in the inner periphery of said cylindrical means and having a pin extending through said guide slot and fitted slidably in said first cam slot; and a compensating component frame for mounting a compensating lens component, fitted slidably on the inner periphery of said cylindrical means and having a pin extending through said guide slot and fitted slidably in said second cam slot.
Claim 2
Dependent Claim
322 words
A mechanism for relative adjustment of axially spaced lens components comprising: a fixed frame mounting a basic lens component disposed nearest the image side of said axially spaced lens components; cylindrical means extending from said fixed frame to the object side of said components, and having a guide slot on the periphery thereof and a threaded ring for forming part of a helicoid mechanism on the tip thereof; a threaded focusing ring engaged by said threaded ring and forming the other part of said helicoid mechanism, and having a focusing component frame for mounting a focusing lens component on the inner periphery thereof and an axial slot on the outer periphery thereof; a control cylinder fitted slidably on said cylindrical means and having a first spiral cam slot and a second spiral cam slot at least on the periphery thereof; a guide means in the form of a ring-shaped member interlocked with said control cylinder perpendicularly to the axis; an operating member fitted on said control cylinder and said focusing ring so as to cover at least a portion thereof and capable of rotation about the axis and axial displacement; a first guide member fixed to said operating member and slidable in said axial slot for transmitting only rotary motion about the axis to said focusing ring; a second guide member fixed to said operating member for cooperating with said ring-shaped guide means to transmit only the axial displacement of said operating member to said control cylinder; a zooming component frame for mounting a zooming lens component, fitted slidably in the inner periphery of said cylindrical means and having a pin extending through said guide slot and fitted slidably in said first cam slot; and a compensating component frame for mounting a compensating lens component, fitted slidably on the inner periphery of said cylindrical means and having a pin extending through said guide slot and fitted slidably in said second cam slot.
Claim 3
Dependent Claim
143 words
A mechanism for a relative adjustment of axially spaced lens components as set forth in claim 1, said cylindrical means having stop means for checking the axial displacement of the control cylinder fitted slidably on the cylindrical means, a first guide slot parallel to the axis, and a second guide slot parallel to said axis separated from said first guide slot, said guide slots being formed on the periphery of said cylindrical means; a third cam slot formed spirally on the periphery of said control cylinder; and an intermediate ring fitted slidably around said control cylinder, which has a pin extending toward the axis for fitting slidably in said third cam slot and said second axial slot, and an annular guide means to cooperate with the second guide member in the direction perpendicularly to the axis on the periphery of said control cylinder.
Claim 4
Dependent Claim
67 words
A mechanism for a relative adjustment of axially spaced lens components as set forth in claim 2, wherein said annular guide means is an annular slot formed perpendicularly to the axis on the outer periphery of the intermediate ring, and said second guide member projects from the inner periphery of the operating ring and consists of at least one projection fitted slidably in said annular guide slot.
Claim 5
Dependent Claim
62 words
A mechanism for a relative adjustment of axially spaced lens component as set forth in claim 2, wherein said annular means consists of a short pitched thread formed axially on the outer periphery of the intermediate ring, and said second guide member projects from the inner periphery of the operating ring and consists of a thread meshed with said short pitched thread.
Claim 6
Dependent Claim
182 words
A mechanism for a relative adjustment of axially spaced lens components as set forth in claim 1, said cylindrical means having stop means for checking the axial displacement of the control cylinder fitted slidably around said cylindrical means and further comprising pulleys supported rotatably respectively beyond the object side and the image side of said control cylinder; an intermediate ring fitted slidably on the outer periphery of said control cylinder and having an annular guide means perpendicular to the axial direction for cooperating with the second guide member; means provided on the fixed frame for checking the rotation about the axis of said intermediate ring; and two flexible members one end of one said member being fixed to the end face of the object side and one end of the other said member being fixed to the end face of the image side of said intermediate ring, the other ends of said members being fixed to the end face of the object side and to the end face of the image side of said control cylinder, respectively, via one of said pulleys.
Claim 7
Dependent Claim
229 words
A mechanism for relative adjustment of axially spaced lens components as set forth in claim 1, said cylindrical means being fixed to said fixed frame to project axially and having spiral fourth and fifth cam slots on the periphery thereof and an axial slot as guide slots on the periphery thereof; said control cylinder fitted slidably around the outer periphery of said cylindrical means having a projection extending from its inner periphery for fitting in said axial slot to check the rotation around the axis thereof, said first cam slot formed spirally on the periphery thereof intersecting said fourth cam slot on the periphery, said second cam slot formed spirally on the periphery thereof intersecting said fifth cam slot on the periphery, and an annular guide slot perpendicular to the axis on the outer periphery; said operating ring being provided with a second guide member fitted slidably in said annular guide slot to transmit axial motion; said zooming component frame fitted slidably on the inner periphery of said cylindrical means having a pin projecting from its outer periphery to fit in the intersection point of the first and the fourth cam slots; and said compensating component frame fitted slidably on the inner periphery of said cylindrical means having a pin projecting from its oUter periphery to fit in the intersection point of the second and the fifth cam slots.
References Cited (Backward Citations)
US3465662A
Cited
US3663093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |