G01B 9/02081
Simultaneous quadrature detection
Official title: {simultaneous quadrature detection, e.g. by spatial phase shifting}
G01B9/02081 (Simultaneous quadrature detection) appears on 187 US grants and 160 published applications in this corpus.
Search patents in G01B- Granted patents
- 187
- Published applications
- 160
- Assignees
- 123
- Inventors
- 330
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 4 |
| 2003 | 5 | 7 |
| 2004 | 4 | 9 |
| 2005 | 8 | 9 |
| 2006 | 7 | 14 |
| 2007 | 8 | 8 |
| 2008 | 10 | 8 |
| 2009 | 7 | 7 |
| 2010 | 4 | 11 |
| 2011 | 13 | 7 |
| 2012 | 2 | 7 |
| 2013 | 9 | 6 |
| 2014 | 11 | 5 |
| 2015 | 3 | 6 |
| 2016 | 9 | 7 |
| 2017 | 6 | 4 |
| 2018 | 7 | 4 |
| 2019 | 4 | 7 |
| 2020 | 5 | 4 |
| 2021 | 6 | 8 |
| 2022 | 7 | 5 |
| 2023 | 2 | 6 |
| 2024 | 5 | 4 |
| 2025 | 5 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Interferometric displacement measurement apparatus15 Sep 2026US 12,736,324 B2Oxford University Innovation Limited
- Rapid coherent synthetic wavelength interferometric absolute distance measurement10 Feb 2026US 12,546,582 B2Duke University
- Three-dimensional measurement device15 Jul 2025US 12,359,906 B2Ckd Corporation
- Atomic force microscope13 May 2025US 12,298,327 B2Centre National De La Recherche Scientifique
- Three-dimensional measurement device25 Mar 2025US 12,259,230 B2Ckd Corporation
- Phase detection device using phase shifting including geometric phase optical element6 Nov 2025US 2025/0341389 A1PSI System Inc.
- Multi-phase interferometer for 3d metrology3 Apr 2025US 2025/0109934 A1
- Self-Configuration and Error Correction in Linear Photonic Circuits13 Mar 2025US 2025/0085100 A1Massachusetts Institute of Technology
- Interferometric displacement measurement apparatus19 Sep 2024US 2024/0310158 A1Oxford University Innovation Limited
- Signal processing method and signal processing device5 Sep 2024US 2024/0295433 A1Nippon Telegraph and Telephone Corporation
Most cited
By later US patents
- System and method for optically measuring a structure261US 5,880,838 ACalifornia Institute of California · 1999
- Jamin-type interferometers and components therefor233US 6,678,056 B22004
- Method and apparatus for performing optical imaging using frequency-domain interferometry229US 7,733,497 B2The General Hospital Corporation · 2010
- Optical quadrature Interferometer189US 6,020,963 ANortheastern University · 2000
- System and method for low coherence broadband quadrature interferometry150US 7,019,838 B2Duke University · 2006