US4699482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opthalmoscopic system
Assignee: UTSUGI OPTICAL LABORATORY Inc
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Filing: 1986-01-07
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Granted: 1987-10-13
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Expires: 2006-01-07
Abstract
Abstract An ophthalmoscopic system having in combination, a intraocular illumination light source, a multitude of light transfer fibre optics regularly arranged in vertical and horizontal rows to project the illuminant light ray from said light source into an eye in the form of a multitude of discrete illuminant light points, a multitude of light-receiving fibre optics regularly arranged in vertical and horizontal rows alternately with said rows of the light transfer fibre optics to receive the reflections of the projected light points, an image receiver connected to said light-receiving fibre optics for converting a transmitted optical picture image into electric signals, and an output device electrically connected to the output terminal of said image receiver.
Inventors
- 👤 Katsuhiko Utsugi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:11
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/12; A61B3/0008
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
248 words
An opthalmoscopic system, comprising: an intraocular illumination light source; a fiber optics bundle placed in front of a cornea of an eye, said bundle including a multitude of core and clad type light transfer fiber optics regularly arranged in any direction of the vertical, the horizontal and the oblique to directly project the illuminant light ray from said light source into said eye, without using any specific device for diffusing light or radiation, in the form of a multitude of discrete illuminant light points and said bundle further including a multitude of core and clad type light-receiving fiber optics regularly arranged in any direction of the vertical, the horizontal and the oblique in each of said light transfer fiber optics to receive the reflections of the projected light points; a first adjusting means for adjusting the intensity of light ray to be projected into said eye from said light transfer optics, the number and position of illumination and the wavelength of the illuminant light; a second adjusting means for adjusting the angle of incidence of the light ray to be projected into the eye from said light transfer fiber optics and the angle of light reception by said light-receiving fiber optics; an image receiver consisting of a semiconductor image conversion element connected to said light-receiving fiber optics for directly converting a transmitted optical picture image into electric image signals; and an output device, consisting of a single CRT, electrically connected to the output terminal of said image receiver.
Claim 2
Dependent Claim
248 words
An opthalmoscopic system, comprising: an intraocular illumination light source; a fiber optics bundle placed in front of a cornea of an eye, said bundle including a multitude of core and clad type light transfer fiber optics regularly arranged in any direction of the vertical, the horizontal and the oblique to directly project the illuminant light ray from said light source into said eye, without using any specific device for diffusing light or radiation, in the form of a multitude of discrete illuminant light points and said bundle further including a multitude of core and clad type light-receiving fiber optics regularly arranged in any direction of the vertical, the horizontal and the oblique in each of said light transfer fiber optics to receive the reflections of the projected light points; a first adjusting means for adjusting the intensity of light ray to be projected into said eye from said light transfer optics, the number and position of illumination and the wavelength of the illuminant light; a second adjusting means for adjusting the angle of incidence of the light ray to be projected into the eye from said light transfer fiber optics and the angle of light reception by said light-receiving fiber optics; an image receiver consisting of a semiconductor image conversion element connected to said light-receiving fiber optics for directly converting a transmitted optical picture image into electric image signals; and an output device, consisting of a single CRT, electrically connected to the output terminal of said image receiver.
Claim 3
Dependent Claim
45 words
The ophthalmoscopic system as set forth in claim 1, wherein said light source includes an illuminant selected from the group consisting an illumination lamp, a laser light source, a semiconductor laser, a laser diode and a light emitting diode, in combination with a condenser lens.
Claim 4
Dependent Claim
42 words
The ophthalmoscopic system as set forth in claim 1, wherein said output device includes a memory device connected to said image receiver wherein said memory device includes a personal computer or a microcomputer with a display, a printer and a floppy disk.
Claim 5
Dependent Claim
71 words
The ophthalmoscopic system as set forth in claim 1, wherein said light transfer fibre optics are adapted to project a light ray into an eye in the form of a multitude of discrete illuminant light points, and said light-receiving fibre optics are adapted to receive the reflection of the projected light ray at a multitude of discrete light-receiving points, converting the received optical image into electric signals at said image converter.
References Cited (Backward Citations)
US4259948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |