Patent US3461432A successfully refreshed from Google Patents.
US5200604A
Expired / Lapsed
US
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Handpiece optical proximity detector for disabling surgical laser beam
Assignee: PLC Medical System Inc
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Filing: 1991-08-07
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Granted: 1993-04-06
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Expires: 2011-08-07
Abstract
Abstract A proximity detector for the probe of a beam delivery apparatus of a laser system includes a probe having a face for confronting a target surface to be struck by the laser beam; means for directing a gauging light to the target surface; means for sensing the gauging light returning from the target surface to the probe; and means responsive to the means for sensing for generating a control signal representative of the position of the probe relative to the surface to enable the laser system to fire.
Inventors
- 👤 Robert I. Rudko
- 👤 Stephen J. Linhares
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; B; B23; B23K; B23K26/00; B23K26/02; B23K26/04; G; G01; G01B; G01B11/00; G01B11/02; G01B11/026; G01S; G01S17/00; G01S17/02; G01S17/06; G01S17/08; G01S17/32; G01S17/36; G01S17/87; A61B18/201; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00057; A61B2017/00115; A61B2017/00119; A61B2017/00123; A61B2018/00636; A61B2018/00666; A61B90/00; A61B90/06; A61B2090/064; A61B2090/065; A61B90/30; A61B2090/306; A61B2218/00; A61B2218/001; A61B2218/002; A61B2218/005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A proximity detector for the probe of the beam delivery apparatus of a laser system comprising: a probe having a face for contacting a target surface to be struck by the laser beam; means for directing a gauging light to said target surface; means for sensing any gauging light returning from said target surface to said probe; and means, responsive to said means for sensing, for generating a control signal inhibiting the firing of the laser system if gauging light returning from said target is sensed by said means for sensing.
Claim 2
Dependent Claim
91 words
A proximity detector for the probe of the beam delivery apparatus of a laser system comprising: a probe having a face for contacting a target surface to be struck by the laser beam; means for directing a gauging light to said target surface; means for sensing any gauging light returning from said target surface to said probe; and means, responsive to said means for sensing, for generating a control signal inhibiting the firing of the laser system if gauging light returning from said target is sensed by said means for sensing.
Claim 3
Dependent Claim
14 words
The proximity detector of claim 1 in which said gauging light is visible light.
Claim 4
Dependent Claim
16 words
The proximity detector of claim 1 in which said means for directing includes a light source.
Claim 5
Dependent Claim
20 words
The proximity detector of claim 3 in which said means for directing includes a first aperture in said probe face.
Claim 6
Dependent Claim
23 words
The proximity detector of claim 4 in which said means for directing includes fiber optic means extending between said light source and aperture.
Claim 7
Dependent Claim
20 words
The proximity detector of claim 1 in which said means for sensing includes a second aperture in said probe face.
Claim 8
Dependent Claim
16 words
The proximity detector of claim 6 in which said means for sensing includes a photodetector means.
Claim 9
Dependent Claim
26 words
The proximity detector of claim 7 in which said means for sensing includes a fiber optic means extending between said photodetector means and said second aperture.
Claim 10
Dependent Claim
19 words
The proximity detector of claim 3 in which said means for directing includes means for modulating said light source.
Claim 11
Dependent Claim
40 words
The proximity detector of claim 9 in which said means for sensing includes photodetector means and phase detector means, responsive to said photodetector means and said means for modulating, for determining the level of the light returning from said surface.
Claim 12
Dependent Claim
44 words
The proximity detector of claim 1 further including a plurality of means for directing and of means for sensing and means, responsive to said means for directing and means for sensing, for indicating that said probe face is tilted relative to said target surface.
Claim 13
Dependent Claim
88 words
A proximity detector for the probe of a beam delivery apparatus of a laser system including a laser arming circuit comprising: a probe having a face for contacting a target surface to be struck by the laser beam; means for directing a gauging light to said target surface; means for sensing any gauging light returning from said target surface to said probe; and means for sending a signal to said arming circuit when said means for sensing senses gauging light returning from said target surface to said probe.
Claim 14
Dependent Claim
88 words
A proximity detector for the probe of a beam delivery apparatus of a laser system including a laser arming circuit comprising: a probe having a face for contacting a target surface to be struck by the laser beam; means for directing a gauging light to said target surface; means for sensing any gauging light returning from said target surface to said probe; and means for sending a signal to said arming circuit when said means for sensing senses gauging light returning from said target surface to said probe.
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) | 1996-04-05 | 1996-10-05 | 1997-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-05 | 2000-10-05 | 2001-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-05 | 2004-10-05 | 2005-04-06 | $7700.00 | Window Closed / Lapsed |