G02B 6/29326
Diffractive elements having focusing properties
Official title: {Diffractive elements having focusing properties, e.g. curved gratings (Rowland circle spectrometers G01J3/20)}
G02B6/29326 (Diffractive elements having focusing properties) appears on 73 US grants and 53 published applications in this corpus.
Search patents in G02B- Granted patents
- 73
- Published applications
- 53
- Assignees
- 43
- Inventors
- 137
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 6 | 6 |
| 2004 | 4 | 5 |
| 2005 | 4 | 9 |
| 2006 | 8 | 6 |
| 2007 | 9 | 5 |
| 2008 | 1 | 2 |
| 2009 | 3 | 0 |
| 2010 | 3 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 2 | 3 |
| 2014 | 2 | 4 |
| 2015 | 3 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Technologies for optical demultiplexing with backwards compatibility6 Oct 2026US 12,754,364 B2Intel Corporation
- Tunable echelle grating24 Jan 2023US 11,561,346 B2Apple Inc.
- Temperature insensitive filter14 Jun 2022US 11,360,262 B2Imec Vzw
- Wafer level coatings for photonic die4 Jan 2022US 11,217,963 B1Skorpios Technologies, Inc.
- Echelle grating demux/mux in SiN26 May 2020US 10,663,659 B2II-Vi Delaware, Inc.
- Systems and methods for photonic interconnection26 Mar 2026US 2026/0086313 A1Massachusetts Institute of Technology
- Technologies for optical demultiplexing with backwards compatibility27 Apr 2023US 2023/0125660 A1Intel Corporation
- Tunable Echelle Grating24 Mar 2022US 2022/0091338 A1Apple Inc.
- Temperature insensitive filter4 Mar 2021US 2021/0063638 A1Imec Vzw
- Echelle grating demux/mux in sin14 Nov 2019US 2019/0346623 A1Finisar Corporation
Most cited
By later US patents
- Amplitude and phase control in distributed optical structures93US 6,678,429 B2LightSmyth Technologies Inc · 2004
- Multimode planar spectrographs for wavelength demultiplexing and methods of fabrication79US 6,657,723 B2International Business Machines Corporation · 2003
- Multiplexer-demultiplexer using an elliptical concave grating and produced in integrated optics77US 4,786,133 ACommissariat A L' Energie Atomique · 1988
- Wavelength-division multiplexed optical integrated circuit with vertical diffraction grating77US 5,355,237 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1994
- Diffraction grating with reduced polarization sensitivity75US 6,097,863 ACorning Incorporated · 2000