US4948967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting a position receiving a light beam
Assignee: Taisei Corp
•
Filing: 1989-12-14
•
Granted: 1990-08-14
•
Expires: 2009-12-14
Abstract
Abstract Disclosed is a method for detecting a position receiving a light beam by using optical fibers. One-side end face of a plurality of optical fibers are arranged in a line or plane. Each optical fiber is branched by a light beam splitter having a plurality of output ports. The branched optical fibers are bundled into groups. Each group of the bundled optical fibers is connected to a light beam detecting sensor which consists of one light beam detecting member for detecting a position receiving a laser beam. Therefore, a large number of light beam sensors are not needed. As a result, the accompanying electronic circuits can be simplified, and high speed processing without any delay is also permitted.
Inventors
- 👤 Masamitsu Naito
- 👤 Michio Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:44
CPC Classifications
G; G01; G01B; G01B11/00; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/28; G02B6/2804
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A method for detecting the location of a spot irradiated by a light beam using optical fibers comprising: providing a plurality of optical fibers, each of said optical fibers having a first end and a second end; arranging said optical fibers so that the first ends thereof are in the form of a linear or two-dimensional array; providing a plurality of light beam splitters, each having an input port and a plurality of light beam splitters, each having an input port and a plurality of output ports and an optical fiber extending from each said output port, said optical fibers extending from said output ports being bundled into a plurality of groups; connecting each of said groups to a photosensor; connecting each said second end of said optical fibers to an input port of a respective light beam splitter, whereby, a light beam impinging upon said linear or two-dimensional array of first ends of said optical fibers is received by at least one of said first ends and detected by a said photosensor, so that a position of the light beam on said linear or two-dimensional array can be determined.
Claim 2
Independent Claim
190 words
A method for detecting the location of a spot irradiated by a light beam using optical fibers comprising: providing a plurality of optical fibers, each of said optical fibers having a first end and a second end; arranging said optical fibers so that the first ends thereof are in the form of a linear or two-dimensional array; providing a plurality of light beam splitters, each having an input port and a plurality of light beam splitters, each having an input port and a plurality of output ports and an optical fiber extending from each said output port, said optical fibers extending from said output ports being bundled into a plurality of groups; connecting each of said groups to a photosensor; connecting each said second end of said optical fibers to an input port of a respective light beam splitter, whereby, a light beam impinging upon said linear or two-dimensional array of first ends of said optical fibers is received by at least one of said first ends and detected by a said photosensor, so that a position of the light beam on said linear or two-dimensional array can be determined.
References Cited (Backward Citations)
US4074142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |