US4717952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical television system
Assignee: Canon Inc
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Filing: 1986-06-06
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Granted: 1988-01-05
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Expires: 2006-06-06
Abstract
Abstract A medical television system includes a television camera and a selector. The television camera includes a filter for separating visible light into three wavelength regions and transmitting near-infrared rays, and an image pickup element having sensitivity to both visible light and near-infrared rays. The selector selectively supplies the visible light separated into the three wavelength components or the near-infrared rays to the television camera.
Inventors
- 👤 Yoshimi Kohayakawa
- 👤 Kazunobu Kobayashi
- 👤 Shinya Tanaka
- 👤 Haruhisa Madate
- 👤 Takeshi Kitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/04; A61B1/042; A61B3/00; A61B3/10; A61B3/14; A61B3/145; H; H04; H04N; H04N23/00; H04N23/20; H04N23/21; H04N23/50; H04N23/555; H04N23/56; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/134; H04N25/131
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
A medical television system, comprising: an illumination optical system for illuminating an object to be examined; a focusing optical system for focusing an image of said object on a predetermined plane; a filter located between said object and said predetermined plane for separating visible light into three wavelength regions and transmitting near-infrared rays; an image pickup element located on said predetermined plane and having sensitivity to both visible light and near-infrared rays; selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by said object, to said image pickup element; and a television monitor connected to said pickup element to indicate a visible light image or a near-infrared ray image.
Claim 2
Dependent Claim
115 words
A medical television system, comprising: an illumination optical system for illuminating an object to be examined; a focusing optical system for focusing an image of said object on a predetermined plane; a filter located between said object and said predetermined plane for separating visible light into three wavelength regions and transmitting near-infrared rays; an image pickup element located on said predetermined plane and having sensitivity to both visible light and near-infrared rays; selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by said object, to said image pickup element; and a television monitor connected to said pickup element to indicate a visible light image or a near-infrared ray image.
Claim 3
Dependent Claim
45 words
A system according to claim 1, wherein said system comprises both a visible light source and a near-infrared source, both of which illuminate an object to be examined, said selecting means includes means for disabling one of said visible light source and said near-infrared source.
Claim 4
Dependent Claim
39 words
A system according to claim 1, wherein said illumination optical system comprises a light source which emits visible lights and near-infrared rays simultaneously and said selecting means comprises a filter selectively inserted between the object and said light source.
Claim 5
Dependent Claim
39 words
A system according to claim 1, wherein said illumination optical system comprises a light source which emits visible light and near-infrared rays simultaneously and said selecting means comprises a filter inserted between the object and said image pickup element.
Claim 6
Dependent Claim
25 words
A system according to claim 1, wherein said image pickup element is of a single tube type, and said filter comprises a three-color stripe filter.
Claim 7
Dependent Claim
30 words
A system according to claim 1, wherein said image pickup element is of a three-tube type, and the near-infrared rays enter at least one part of said image pickup element.
Claim 8
Dependent Claim
98 words
An ophthalmologic system including a medical television apparatus, comprising: an illumination optical system for illuminating a fundus of an eye to be examined; a focusing optical system for focusing a fundus image on a predetermined plane; a television camera including a filter for separating visible light into three wavelength regions and transmitting near-infrared rays, and including an image pickup element located on the predetermined plane and having sensitivity to both visible light and near-infrared rays; and selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by the fundus, to said television camera.
Claim 9
Dependent Claim
98 words
An ophthalmologic system including a medical television apparatus, comprising: an illumination optical system for illuminating a fundus of an eye to be examined; a focusing optical system for focusing a fundus image on a predetermined plane; a television camera including a filter for separating visible light into three wavelength regions and transmitting near-infrared rays, and including an image pickup element located on the predetermined plane and having sensitivity to both visible light and near-infrared rays; and selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by the fundus, to said television camera.
Claim 10
Dependent Claim
112 words
An ophthalmologic system including a medical television apparatus, comprising: an illumination optical system for illuminating a fundus of an eye to be examined; a focusing optical system for focusing a fundus image on a predetermined plane; a television camera including a filter for separating visible light into three wavelength regions and transmitting near-infrared rays, and including an image pickup element located on the predetermined plane and having sensitivity to both visible light and near-infrared rays; selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by the fundus, to said television camera; and an image recording unit for recording a one-frame image signal from said television camera.
Claim 11
Dependent Claim
112 words
An ophthalmologic system including a medical television apparatus, comprising: an illumination optical system for illuminating a fundus of an eye to be examined; a focusing optical system for focusing a fundus image on a predetermined plane; a television camera including a filter for separating visible light into three wavelength regions and transmitting near-infrared rays, and including an image pickup element located on the predetermined plane and having sensitivity to both visible light and near-infrared rays; selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by the fundus, to said television camera; and an image recording unit for recording a one-frame image signal from said television camera.
Claim 12
Dependent Claim
111 words
A television system comprising: an illumination optical system for illuminating an object; a focusing optical system for focusing an image of said object on a predetermined plane; a filter located between said object and said predetermined plane for separating visible light into three wavelength regions and transmitting near-infrared rays; an image pickup element located on said predetermined plane and having sensitivity to both visible light and near-infrared rays; selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by said object, to said image pickup element; and a television monitor connected to said pickup element to indicate a visible light image or a near-infrared ray image.
Claim 13
Dependent Claim
111 words
A television system comprising: an illumination optical system for illuminating an object; a focusing optical system for focusing an image of said object on a predetermined plane; a filter located between said object and said predetermined plane for separating visible light into three wavelength regions and transmitting near-infrared rays; an image pickup element located on said predetermined plane and having sensitivity to both visible light and near-infrared rays; selecting means for selectively supplying the visible light or the near-infrared rays, which are reflected by said object, to said image pickup element; and a television monitor connected to said pickup element to indicate a visible light image or a near-infrared ray image.
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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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |