G01B 9/02007
Two or more frequencies or sources used for interferometric measurement
Official title: {Two or more frequencies or sources used for interferometric measurement (using only beat G01B9/02003)}
G01B9/02007 (Two or more frequencies or sources used for interferometric measurement) appears on 620 US grants and 570 published applications in this corpus.
Search patents in G01B- Granted patents
- 620
- Published applications
- 570
- Assignees
- 327
- Inventors
- 1,163
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 8 | 0 |
| 1991 | 3 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 11 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 14 | 0 |
| 1999 | 9 | 0 |
| 2000 | 13 | 0 |
| 2001 | 14 | 3 |
| 2002 | 10 | 7 |
| 2003 | 12 | 18 |
| 2004 | 16 | 19 |
| 2005 | 16 | 27 |
| 2006 | 20 | 20 |
| 2007 | 11 | 24 |
| 2008 | 19 | 21 |
| 2009 | 26 | 15 |
| 2010 | 17 | 29 |
| 2011 | 17 | 28 |
| 2012 | 19 | 21 |
| 2013 | 16 | 29 |
| 2014 | 16 | 23 |
| 2015 | 24 | 23 |
| 2016 | 17 | 12 |
| 2017 | 25 | 20 |
| 2018 | 19 | 25 |
| 2019 | 25 | 33 |
| 2020 | 27 | 23 |
| 2021 | 26 | 27 |
| 2022 | 25 | 23 |
| 2023 | 14 | 35 |
| 2024 | 24 | 35 |
| 2025 | 36 | 14 |
| 2026 | 15 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method to determine an absolute position of a movable object, interferometer system, projection system and lithograpic apparatus8 Sep 2026US 12,729,948 B2ASML Netherlands B. V.
- Balanced heterodyne laser interferometer with optical axis shift1 Sep 2026US 12,723,864 B2Seiko Epson Corporation
- Optical self-heterodyne detection system including optical frequency comb light source1 Sep 2026US 12,723,865 B2Electronics and Telecommunications Research Institute
- Apparatus and methods to enhance signal to noise ratio imaging performance in optical coherence tomography21 Jul 2026US 12,687,384 B2The General Hospital Corporation
- Method and apparatus for mapping and ranging based on coherent-time comparison14 Jul 2026US 12,680,808 B2Lidwave Ltd.
- Apparatus and methods to enhance signal to noise ratio imaging performance in optical coherence tomography24 Sep 2026US 2026/0287326 A1The General Hospital Corporation
- Dual-comb spectroscopy system with tunable frequency difference at high repetition rates13 Aug 2026US 2026/0235439 A1South China University of Technology
- Method for determining a position by differential optical interferometry and differential interferometer for doing the same6 Aug 2026US 2026/0227172 A1Prodrive Technologies Innovation Services B.V.
- Method for determining a position of a target by optical interferometry and device for doing the same30 Jul 2026US 2026/0219027 A1Prodrive Technologies Innovation Services B.V.
- Method and apparatus for all-optical spatial frequency domain scanning for broadband high-precision measurement30 Jul 2026US 2026/0219028 A1Electronics and Telecommunications Research Institute
Most cited
By later US patents
- Method and apparatus for performing optical measurements using a fiber optic imaging guidewire, catheter or endoscope1,079US 6,134,003 AMassachusetts Institute of Technology · 2000
- Fiber optic imaging endoscope interferometer with at least one faraday rotator710US 6,501,551 B1Massachusetts Institute of Technology · 2002
- Rapid depth scanning optical imaging device428US 6,687,010 B1Olympus Corporation · 2004
- Differential interferometer system and lithographic step-and-scan apparatus provided with such a system426US 6,046,792 AU. S. Philips Corporation · 2000
- Depth-resolved spectroscopic optical coherence tomography381US 6,002,480 A1999