US5270747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereomicroscope with first and second illuminating systems
Assignee: Topcon Corp
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Filing: 1992-11-09
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Granted: 1993-12-14
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Expires: 2012-11-09
Abstract
Abstract A stereomicroscope has an objective lens facing an eye, and the first and the second observing optical systems for three-dimensionally observing the eye through the objective lens. The stereomicroscope also has the first and the second illuminating systems for illuminating the eye around the optical axes of the first and second observing optical systems.
Inventors
- 👤 Nobuaki Kitajima
- 👤 Kazutoshi Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:48
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/13
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
A stereomicroscope including an objective lens facing an eye, and first and the second observing optical systems for three-dimensionally observing the eye through said objective lens, said stereomicroscope further including: a light splitting element movable between inside and outside positions of the optical paths of said first and second observing optical systems; first and the second illuminating optical systems for illuminating said eye around the optical axes of said first and second observing optical systems through said splitting element when said splitting element is moved into said optical paths; and a reflecting mirror movable between inside and outside positions of said optical paths of said first and second illuminating optical systems, the illuminating light of said first and second illuminating optical systems illuminating said eye in a different angle from that of the optical axes of said first and second observing optical paths through said reflecting mirror when said reflecting mirror is moved into said optical paths.
Claim 2
Dependent Claim
157 words
A stereomicroscope including an objective lens facing an eye, and first and the second observing optical systems for three-dimensionally observing the eye through said objective lens, said stereomicroscope further including: a light splitting element movable between inside and outside positions of the optical paths of said first and second observing optical systems; first and the second illuminating optical systems for illuminating said eye around the optical axes of said first and second observing optical systems through said splitting element when said splitting element is moved into said optical paths; and a reflecting mirror movable between inside and outside positions of said optical paths of said first and second illuminating optical systems, the illuminating light of said first and second illuminating optical systems illuminating said eye in a different angle from that of the optical axes of said first and second observing optical paths through said reflecting mirror when said reflecting mirror is moved into said optical paths.
Claim 3
Dependent Claim
34 words
A stereomicroscope according to claim 1, wherein said first and second illuminating optical systems have a deflecting element for arranging the optical axes of said first and second illuminating optical systems in parallel relation.
Claim 4
Dependent Claim
19 words
A stereomicroscope according to claim 2, wherein said deflecting element comprises a deflecting lens for displacing the optical axes.
Claim 5
Dependent Claim
13 words
A stereomicroscope according to claim 2, wherein said deflecting element comprises a prism.
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) | 1996-12-13 | 1997-06-14 | 1997-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-13 | 2001-06-14 | 2001-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-13 | 2005-06-14 | 2005-12-14 | $7700.00 | Window Closed / Lapsed |