US5115267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zoom lens drive mechanism
Assignee: Fujifilm Corp
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Filing: 1990-07-24
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Granted: 1992-05-19
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Expires: 2010-07-24
Abstract
Abstract A parallax correcting mechanism for a camera having a zoom lens. An objective lens is placed in the optical path of a viewfinder and is movable perpendicular to the optical axis of the viewfinder in cooperation with the focusing mechanism of the associated camera. A movable lens is also placed in the optical path of the viewfinder and is movable along the optical axis of the viewfinder in cooperation with the zoom adjustment of a zoom lens associated with the camera. The movement of the objective lens corrects for any parallax error between the viewfinder and an image seen by the zoom lens of the camera. The movement of the movable lens insures that the field angle of the viewfinder will correspond to that of the zoom lens.
Inventors
- 👤 Shigeru Kondo
- 👤 Naoki Takatori
- 👤 Masaaki Morizumi
- 👤 Shino Kanamori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
A parallax correction mechanism comprising: a finder guided so as to be freely movable in a direction where an objective lens moves towards and away from a taking lens; a focus adjustment mechanism for adjusting the focus of said taking lens so that an image of an object can be in focus on an image pickup surface; and, a connecting mechanism part for connecting said focus adjustment mechanism with said objective lens of said finder and for moving said objective lens in link with the operation of said focus adjustment mechanism.
Claim 2
Dependent Claim
91 words
A parallax correction mechanism comprising: a finder guided so as to be freely movable in a direction where an objective lens moves towards and away from a taking lens; a focus adjustment mechanism for adjusting the focus of said taking lens so that an image of an object can be in focus on an image pickup surface; and, a connecting mechanism part for connecting said focus adjustment mechanism with said objective lens of said finder and for moving said objective lens in link with the operation of said focus adjustment mechanism.
Claim 3
Dependent Claim
190 words
A parallax correcting mechanism comprising: a viewfinder, comprising an objective lens movable along a first axis perpendicular to an optical axis of the viewfinder, and a movable lens movable along a second axis parallel to said optical axis; a focus adjustment mechanism for adjusting the focus of an image-taking lens so that an image of an object can be focused on an image pick-up surface; a zoom adjustment mechanism for adjusting the size of said image on said image pick-up surface; a first linkage for operatively connecting said focus adjustment mechanism with said objective lens and for moving said objective lens along said first axis in concert with said focus adjustment mechanism so as to correct for any parallax error between a viewed image viewed through said viewfinder and said image focused on said image pick-up surface; and a second linkage for operatively connecting said zoom adjustment mechanism with said movable lens and for moving said movable lens in concert with said zoom adjustment mechanism along said second axis so as to cause a field angle of said viewfinder to correspond to a field angle of said zoom adjustment mechanism.
Claim 4
Dependent Claim
190 words
A parallax correcting mechanism comprising: a viewfinder, comprising an objective lens movable along a first axis perpendicular to an optical axis of the viewfinder, and a movable lens movable along a second axis parallel to said optical axis; a focus adjustment mechanism for adjusting the focus of an image-taking lens so that an image of an object can be focused on an image pick-up surface; a zoom adjustment mechanism for adjusting the size of said image on said image pick-up surface; a first linkage for operatively connecting said focus adjustment mechanism with said objective lens and for moving said objective lens along said first axis in concert with said focus adjustment mechanism so as to correct for any parallax error between a viewed image viewed through said viewfinder and said image focused on said image pick-up surface; and a second linkage for operatively connecting said zoom adjustment mechanism with said movable lens and for moving said movable lens in concert with said zoom adjustment mechanism along said second axis so as to cause a field angle of said viewfinder to correspond to a field angle of said zoom adjustment mechanism.
References Cited (Backward Citations)
US4831399A
Cited
US4887109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |