Patent US4800546A successfully refreshed from Google Patents.
US4800546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical information record/regenerating apparatus with device for prohibiting movement of optical head
Assignee: Canon Inc
•
Filing: 1986-09-24
•
Granted: 1989-01-24
•
Expires: 2006-09-24
Abstract
Abstract There is disclosed an optical information record/regenerating apparatus, provided with an optical system for forming a light spot on an optical information recording medium having plural tracks and a track jump area in the tracks, and an optical head movably supporting the optical system so as that the light spot can be moved at least to an adjacent track in the track jump area. Information recording and/or regeneration is achieved by moving both the optical head relative to the recording medium, and by moving the optical system within the optical head. However, the movement of the optical head is prohibited in the track jump area to stabilize the track control operation.
Inventors
- 👤 Satoshi Shikichi
- 👤 Akio Aoki
- 👤 Kazuo Minoura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:01
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B7/00; G11B7/08; G11B7/085; G11B7/08505; Y; Y10; Y10S; Y10S358/00; Y10S358/907
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
An optical information recording and/or regenerating apparatus comprising: an optical system for forming at least one light spot on an optical information recording medium provided with plural tracks and having a track jump area therein; an optical head including moving means for movably supporting said optical system; optical system driving means for driving said moving means so that said light spot is moved, in said track jump area, from a track at least to another track adjacent thereto; head move means for moving said optical head relative to said optical information recording medium in a direction substantially perpendicular to the tracks; detection means for detecting whether said light spot is positioned in said track jump area; tracking control means for controlling both said optical system driving means and said head move means according to a tracking error signal; and prohibition means for prohibiting the movement of said optical head by said head move means when said detection means detects that the light spot is positioned in said track jump area.
Claim 2
Dependent Claim
170 words
An optical information recording and/or regenerating apparatus comprising: an optical system for forming at least one light spot on an optical information recording medium provided with plural tracks and having a track jump area therein; an optical head including moving means for movably supporting said optical system; optical system driving means for driving said moving means so that said light spot is moved, in said track jump area, from a track at least to another track adjacent thereto; head move means for moving said optical head relative to said optical information recording medium in a direction substantially perpendicular to the tracks; detection means for detecting whether said light spot is positioned in said track jump area; tracking control means for controlling both said optical system driving means and said head move means according to a tracking error signal; and prohibition means for prohibiting the movement of said optical head by said head move means when said detection means detects that the light spot is positioned in said track jump area.
Claim 3
Dependent Claim
47 words
An optical information recording and/or regenerating apparatus according to claim 1, wherein said prohibition means is adapted to interrupt the control on said head move means by said tracking control means when said detection means detects that the light spot is positioned in said track jump area.
Claim 4
Dependent Claim
46 words
An optical information recording and/or regenerating apparatus according to claim 1, wherein said detection means comprises a light shield member provided on a shuttle supporting said optical information recording medium, and a photointerrupter provided at an end of the movable range of said light shield member.
Claim 5
Dependent Claim
32 words
An optical information recording and/or regenerating apparatus according to claim 1, wherein said optical system driving means is adapted to drive said optical system within a predetermined range around a standard position.
Claim 6
Dependent Claim
64 words
An optical information recording and/or regenerating apparatus according to claim 4, wherein said tracking control means is adapted to control said optical system driving means and said head move means in such a manner that said optical system is positioned generally at said standard position while the light spot moves in an area of the optical information recording medium outside said track jump area.
Claim 7
Dependent Claim
67 words
An optical information recording and/or regenerating apparatus according to claim 4, wherein said tracking control means is adapted to control said optical system driving means and said head move means in such a manner that said optical system is driven in a range smaller than said predetermined range, while the light spot moves in an area of the optical information recording medium outside said track jump area.
References Cited (Backward Citations)
US3854015A
Cited
US4057832A
Cited
US4236232A
Cited
US4330880A
Cited
US4489406A
Cited
US4613963A
Cited
US4567534A
Cited
US4567533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |