Method and apparatus for positioning object in space using a low-coherence laser beam which is reflected by two references to sharpen the interference fringe lines
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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May 16, 2000
Grant Date -
N/A
app pub date -
Aug 27, 1997
filing date -
Aug 27, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An object is positioned in space by using a beam splitter to split a low-coherence laser light beam into a probe beam and a reference beam. The probe beam is projected at the target object, while the reference beam is reflected by a pair of mirrors synchronized along light paths and scanned at different amplitudes, to form two beams of equal intensity, and light reflected by the object and the interference fringes are detected together to obtain fringe signals with sharpened profile lines.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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AGENCY OF INDUSTRIAL SCIENCE & TECHNOLOGY MINISTRY OF INTERNATIONAL TRADE & INDUSTRY | 3-1 KASUMIGASEKI 1-CHOME CHIYODA-KU TOKYO |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Matsumoto, Hirokazu | Tsukuba, JP | 65 | 211 |
# of filed Patents : 65 Total Citations : 211 | |||
Minoshima, Kaoru | Tsukuba, JP | 4 | 2 |
# of filed Patents : 4 Total Citations : 2 |
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Patent Citation Ranking
- 2 Citation Count
- G01B Class
- 1.26 % this patent is cited more than
- 25 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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Oct 17, 2017 | I | Issuance | |
Sep 27, 2017 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Aug 20, 2015 | P | Published | |
Jul 04, 2013 | F | Filing | |
Jul 06, 2012 | PD | Priority Date |

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