G02B 6/29308
Diffractive element having focusing properties
Official title: {Diffractive element having focusing properties, e.g. curved gratings (Rowland circle spectrometers G01J3/20)}
G02B6/29308 (Diffractive element having focusing properties) appears on 106 US grants and 73 published applications in this corpus.
Search patents in G02B- Granted patents
- 106
- Published applications
- 73
- Assignees
- 74
- Inventors
- 220
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 2 |
| 2002 | 10 | 7 |
| 2003 | 7 | 7 |
| 2004 | 4 | 5 |
| 2005 | 4 | 5 |
| 2006 | 9 | 4 |
| 2007 | 1 | 4 |
| 2008 | 5 | 1 |
| 2009 | 2 | 1 |
| 2010 | 3 | 1 |
| 2011 | 1 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 4 |
| 2014 | 3 | 3 |
| 2015 | 3 | 4 |
| 2016 | 3 | 5 |
| 2017 | 5 | 2 |
| 2018 | 1 | 3 |
| 2019 | 4 | 2 |
| 2020 | 1 | 2 |
| 2021 | 2 | 0 |
| 2022 | 2 | 5 |
| 2023 | 4 | 0 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wavelength agile multiplexing11 Aug 2026US 12,704,682 B2Apple Inc.
- Systems, devices and methods for optical beam combining6 Aug 2024US 12,055,760 B2Elbit Systems Electro-Optics Elop Ltd.
- Wavelength agile multiplexing14 Nov 2023US 11,815,719 B2Apple Inc.
- Diffraction grating device, method of manufacturing the same, and optical apparatus including the diffraction grating device5 Sep 2023US 11,747,528 B2Samsung Electronics Co., Ltd.
- On-chip optical switch based on an echelle grating1 Aug 2023US 11,714,240 B2SiLC Technologies, Inc.
- Interlocked n-by-n wavelength selective switch19 Feb 2026US 2026/0050125 A1II-Vi Delaware, Inc.
- Systems, devices and methods for optical beam combining28 Nov 2024US 2024/0393538 A1Elbit Systems Electro-Optics Elop Ltd.
- Wavelength Agile Multiplexing7 Mar 2024US 2024/0077679 A1Apple Inc.
- On-chip optical switch based on an echelle grating29 Dec 2022US 2022/0413224 A1SiLC Technologies, Inc.
- On-chip optical switch based on an echelle grating14 Jul 2022US 2022/0221652 A1SiLC Technologies, Inc.
Most cited
By later US patents
- Wavelength multiplexer/demultiplexer for optical circuits110US 4,274,706 AHughes Aircraft Company · 1981
- Photorefractive systems and methods109US 5,440,669 AAccuwave Corporation · 1995
- Holographic reflective grating multiplexer/demultiplexer90US 4,387,955 AThe United States of America as represented by the Secretary of the Air Force · 1983
- Compact double-pass wavelength multiplexer-demultiplexer having an increased number of channels85US 6,108,471 ABaySpec, Inc. · 2000
- Multi-channel optical sensing system79US 4,367,040 ATokyo Shibaura Denki Kabushiki Kaisha · 1983