US4477159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photocoagulator
Assignee: Nidek Co Ltd
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Filing: 1981-11-05
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Granted: 1984-10-16
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Expires: 2001-11-05
Abstract
Abstract A photocoagulator of the type having a light source device and an ophthalmoscope device. The light source device and the ophthalmoscope device are optically connected to each other by optical fiber means adapted to transmit the light.
Inventors
- 👤 Katsuyoshi Mizuno
- 👤 Akira Ihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:39
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/008; A61F9/00821; A61B; A61B17/00; A61B2017/00973; A61B90/00; A61B90/50; A61B2090/502; A61F2009/0035; A61F2009/00861; A61F2009/00863
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A photocoagulator including an opthalmoscope and a slit lamp, both of which are adapted to direct a laser beam and illumination light to a lesion on a patient's fundus oculi comprising: i. means for producing a laser beam; ii. first fiber means for guiding said laser beam to said opthalmoscope; iii. second fiber means for guiding said laser beam to said slit lamp; iv. means for switching said laser beam from said laser beam producing means so as to direct the laser beam to said first or second fiber, selectively, said switching means including a penta prism for refracting and reflecting said laser beam from said laser beam producing means, and means for controlling the position of said penta prism so that said laser beam from said laser beam producing means is selectively directed to said first or second fiber means through a penta prism; whereby the treatment of photocoagulation can be suitably made in accordance with positions of a lesion on the patient's fundus oculi.
Claim 2
Dependent Claim
166 words
A photocoagulator including an opthalmoscope and a slit lamp, both of which are adapted to direct a laser beam and illumination light to a lesion on a patient's fundus oculi comprising: i. means for producing a laser beam; ii. first fiber means for guiding said laser beam to said opthalmoscope; iii. second fiber means for guiding said laser beam to said slit lamp; iv. means for switching said laser beam from said laser beam producing means so as to direct the laser beam to said first or second fiber, selectively, said switching means including a penta prism for refracting and reflecting said laser beam from said laser beam producing means, and means for controlling the position of said penta prism so that said laser beam from said laser beam producing means is selectively directed to said first or second fiber means through a penta prism; whereby the treatment of photocoagulation can be suitably made in accordance with positions of a lesion on the patient's fundus oculi.
Claim 3
Dependent Claim
16 words
A photocoagulator as set forth in claim 1, wherein said opthalmoscope is a binocular indirect opthalmoscope.
Claim 4
Dependent Claim
16 words
A photocoagulator as set forth in claim 1, wherein said opthalmoscope is a monocle indirect opthalmoscope.
Claim 5
Dependent Claim
41 words
A photocoagulator as set forth in claim 1, wherein said control means for the position of said penta prism comprises means for switching the position of said penta prism so that said prism is rotated to an angle of 90 degrees.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |