US5769844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conventional light-pumped high power system for medical applications
Assignee: Individual
•
Filing: 1995-06-07
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Granted: 1998-06-23
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Expires: 2015-06-07
Abstract
Abstract An optical system which utilizes a conventional light source to produce a narrowly focused beam of radiation having intensity similar to that produced by a laser. The system broadly includes an omnidirectional light source and an elliptical reflector, wherein the physical parameters of the light source and the reflector are matched to produce a narrowly focused beam of intense radiation. The light produced by the system is coupled into a fiber optic system for delivery to the target area. In one embodiment, a mirrored surface having an aperture therein is placed at a point near the second focal point of the reflector. The aperture is positioned such that only rays meeting predetermined geometrical exit criteria can pass through the aperture and be accepted by the fiber optic located at the second focal point. Those rays which do not meet the exit criteria are reflected by the mirrored surface toward the interior of the cavity. Some of the reflected rays provide additional amplification of the light produced by the light source and the course of these rays is altered such that they are eventually able to meet the exit criteria and pass through the aperture.
Inventors
- 👤 Shahriar Ghaffari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:54
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4298; A61B2018/1807; A61B2018/2035; A61B2018/20553
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A system for producing an intense beam of light for delivery to a portion of tissue, comprising: a radiation source; a first reflector having first and second focal points, said radiation source being placed at said first focal point, said first reflector being operable to direct radiation from said radiation source toward said second focal point; optical means to partially reflect bands of rays having an intensity distribution, originating from said first focal point, to said first focal point such that said intensity distribution of the reflected band of rays is the inverse of said intensity distribution of the originating rays; optical limiting means for limiting radiation received at said second focal point from said first focal point to a specific numerical aperture; an optical receiver at said second focal point having a numerical aperture to accept beams of said radiation passed by said optical limiting means; and means for delivering radiation from said optical receiver to a portion of tissue.
Claim 2
Independent Claim
161 words
A system for producing an intense beam of light for delivery to a portion of tissue, comprising: a radiation source; a first reflector having first and second focal points, said radiation source being placed at said first focal point, said first reflector being operable to direct radiation from said radiation source toward said second focal point; optical means to partially reflect bands of rays having an intensity distribution, originating from said first focal point, to said first focal point such that said intensity distribution of the reflected band of rays is the inverse of said intensity distribution of the originating rays; optical limiting means for limiting radiation received at said second focal point from said first focal point to a specific numerical aperture; an optical receiver at said second focal point having a numerical aperture to accept beams of said radiation passed by said optical limiting means; and means for delivering radiation from said optical receiver to a portion of tissue.
Claim 3
Dependent Claim
35 words
The system of claim 1, wherein the optical means is operable to perform wavelength Q-switching to partially reflect bands of rays for a first set of wavelengths, and transmit at a second set of wavelengths.
Claim 4
Dependent Claim
25 words
The system of claim 1, wherein the optical means to partially reflect bands of rays is comprised of a reflective surface with an aperture therein.
Claim 5
Dependent Claim
27 words
The system of claim 1, wherein said means for delivering said radiation further comprises filtering means for controlling the wavelength of radiation to be delivered to tissue.
Claim 6
Dependent Claim
14 words
The system of claim 4, wherein said radiation source comprises a conventional arc lamp.
Claim 7
Dependent Claim
16 words
The system of claim 5, wherein said means for delivering said radiation comprises a fiber optic.
Claim 8
Dependent Claim
26 words
The system of claim 6, wherein the said radiation source is provided with a low stand-by current and periodically pulsed with a very high level current.
Claim 9
Independent Claim
132 words
A method for producing high intensity light, comprising: placing an incoherent light source adjacent a reflector, said light source having first and second electrodes, said reflector having first and second focal points; placing a second light reflective means at the second focal point to define a cavity to trap a portion of rays originated from said light source such that the reflection of said band of rays is added to the originating band of rays; providing pulsed current source to generate a controlled stretched plasma region between said first and second electrodes, thereby generating controlled light intensity at said second focal point; placing an optical receiver at said second focal point of said reflector to accept radiation generated by said incoherent light source and to deliver said radiation to a target site.
Claim 10
Independent Claim
132 words
A method for producing high intensity light, comprising: placing an incoherent light source adjacent a reflector, said light source having first and second electrodes, said reflector having first and second focal points; placing a second light reflective means at the second focal point to define a cavity to trap a portion of rays originated from said light source such that the reflection of said band of rays is added to the originating band of rays; providing pulsed current source to generate a controlled stretched plasma region between said first and second electrodes, thereby generating controlled light intensity at said second focal point; placing an optical receiver at said second focal point of said reflector to accept radiation generated by said incoherent light source and to deliver said radiation to a target site.
Claim 11
Dependent Claim
35 words
The method of claim 8 said optical receiver having a numerical aperture, matched to the inverse of two times the "F/number" of the reflector, to accept all of the band of rays from the cavity.
References Cited (Backward Citations)
US3434818A
Cited
US3693623A
Cited
US4233493A
Cited
US4504955A
Cited
US4732448A
Cited
US4628416A
Cited
US4917084A
Cited
US4860172A
Cited
US5567031A
Cited
US5582480A
Cited
US5618102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |