US5057102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contrast adjustor for aiming laser
Assignee: Topcon Corp
•
Filing: 1990-05-18
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Granted: 1991-10-15
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Expires: 2010-05-18
Abstract
Abstract A laser treatment apparatus is to treat a site of disease of a patient with a laser beam. The laser treatment apparatus contains a source of illumination light for irradiating a site of treatment of the patient and a site around the site of treatment with the illumination light; a source of aiming light for irradiating the site of treatment with the aiming light; a light-receiving device for receiving a light reflected from an aiming site to which the aiming light is applied and from a site around the aiming site; a setting means for comparing a ratio of a quantity of light reflected from the aiming site, as received by the light-receiving means, to a quantity of light reflected from the site around the aiming site with a predetermined ratio; and a control unit for controlling an illuminance of the aiming light with respect to the illumination light by adjusting a ratio of the quantity of light reflected from the aiming site to the quantity of light reflected from the site around the aiming site so as to reach a predetermined ratio.
Inventors
- 👤 Yuko Tomioka
- 👤 Hiroshi Koizumi
- 👤 Masatsugu Kijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:28
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/007; A61F9/008; A61F9/00821; A61B; A61B90/00; A61B90/36; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00057; A61B18/00; A61B18/18; A61B18/20; A61B2018/2015; A61B2018/2025; A61F2009/00861; A61F2009/00874
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
183 words
A laser treatment apparatus for treating a site of disease of a patient with a laser beam, comprising: a source of illumination light including means for irradiating a site of treatment of the patient and a site around the site of treatment with the illumination light; a source of aiming light including means for irradiating the site of treatment with the aiming light; light-receiving means for receiving a light reflected from an aiming site to which the aiming light is applied and from a site around the aiming site; a setting means for comparing a ratio of a quantity of light reflected from the aiming site, as received by the light-receiving means, to a quantity of light reflected from the site around the aiming site with a predetermined ratio; and a control unit including means for controlling an illuminance of the aiming light with respect to the illumination light by adjusting a ratio of the quantity of light reflected from the aiming site to the quantity of light reflected from the site around the aiming site so as to reach a predetermined ratio.
Claim 2
Dependent Claim
183 words
A laser treatment apparatus for treating a site of disease of a patient with a laser beam, comprising: a source of illumination light including means for irradiating a site of treatment of the patient and a site around the site of treatment with the illumination light; a source of aiming light including means for irradiating the site of treatment with the aiming light; light-receiving means for receiving a light reflected from an aiming site to which the aiming light is applied and from a site around the aiming site; a setting means for comparing a ratio of a quantity of light reflected from the aiming site, as received by the light-receiving means, to a quantity of light reflected from the site around the aiming site with a predetermined ratio; and a control unit including means for controlling an illuminance of the aiming light with respect to the illumination light by adjusting a ratio of the quantity of light reflected from the aiming site to the quantity of light reflected from the site around the aiming site so as to reach a predetermined ratio.
Claim 3
Dependent Claim
19 words
A laser treatment apparatus as claimed in claim 1, wherein said source of illumination comprises a white light source.
Claim 4
Dependent Claim
25 words
A laser treatment apparatus as claimed in claim 1, wherein the source of aiming light is a helium-neon laser or a visible light emitting diode.
Claim 5
Dependent Claim
28 words
A laser treatment apparatus as claimed in claim 1, wherein the laser beam is applied along an optical axis which is coincident with that of the aiming light.
Claim 6
Dependent Claim
41 words
A laser treatment apparatus as claimed in claim 1, wherein the light-receiving means comprises a detector having a light-receiving element corresponding to a point reflecting the aiming light and a plurality of light-receiving elements corresponding to points reflecting the illumination light.
Claim 7
Dependent Claim
50 words
A laser treatment apparatus as claimed in claim 5, wherein the detector includes means for obtaining a mean value of intensity of light reflected to the plurality of light-receiving elements and a value of intensity of light reflected to the light-receiving element corresponding to the point of the aiming light.
References Cited (Backward Citations)
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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) | 1994-10-14 | 1995-04-15 | 1995-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-14 | 1999-04-15 | 1999-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-14 | 2003-04-15 | 2003-10-15 | $7700.00 | Window Closed / Lapsed |