US5132837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operation microscope
Assignee: Topcon Corp
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Filing: 1990-03-13
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Granted: 1992-07-21
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Expires: 2010-03-13
Abstract
Abstract An operation microscope including a plurality of objective lenses arranged at different angles with respect to an object to be viewed and a selecting optical system having a function of selecting one of light beams from the objective lenses and enabling the object to be observed at the different angles. Accordingly, a visual field for observation of an object to be operated may be expanded.
Inventors
- 👤 Nobuaki Kitajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:07
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/18; A; A61; A61B; A61B90/00; A61B90/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
181 words
An operation microscope for use in operating on an object comprising: a light source means for irradiating light into said object; a plurality of objective lens means arranged at different angles with respect to said object for receiving light beams reflected from said object, and for irradiating at least one of said light beams into at least one eye of an operator; a plurality of ocular optical systems; and a selecting optical means for selecting at least one light beam reflected from said object and by moving between a position for shutting the reflected light beam and another position for guiding the reflected light beam to a corresponding one of said plurality of ocular optical systems, wherein, when said at least one reflected light beam is shut off by said selecting optical means, images at the same angles are focused on a plurality of ocular optical systems, and wherein, when said reflected light beam selected by said selecting optical means is guided to a selected ocular optical system, each of said ocular optical systems focuses an image at a different angle.
Claim 2
Dependent Claim
181 words
An operation microscope for use in operating on an object comprising: a light source means for irradiating light into said object; a plurality of objective lens means arranged at different angles with respect to said object for receiving light beams reflected from said object, and for irradiating at least one of said light beams into at least one eye of an operator; a plurality of ocular optical systems; and a selecting optical means for selecting at least one light beam reflected from said object and by moving between a position for shutting the reflected light beam and another position for guiding the reflected light beam to a corresponding one of said plurality of ocular optical systems, wherein, when said at least one reflected light beam is shut off by said selecting optical means, images at the same angles are focused on a plurality of ocular optical systems, and wherein, when said reflected light beam selected by said selecting optical means is guided to a selected ocular optical system, each of said ocular optical systems focuses an image at a different angle.
Claim 3
Dependent Claim
30 words
The microscope as defined in claim 1, wherein said selecting optical means is located behind said objective lens means, and between said objective lens means and an image formation point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |