G02B 6/29311
Diffractive element operating in transmission
Official title: {Diffractive element operating in transmission}
G02B6/29311 (Diffractive element operating in transmission) appears on 432 US grants and 388 published applications in this corpus.
Search patents in G02B- Granted patents
- 432
- Published applications
- 388
- Assignees
- 209
- Inventors
- 694
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 9 | 0 |
| 1998 | 3 | 0 |
| 1999 | 9 | 0 |
| 2000 | 7 | 0 |
| 2001 | 15 | 4 |
| 2002 | 24 | 24 |
| 2003 | 14 | 49 |
| 2004 | 27 | 31 |
| 2005 | 27 | 44 |
| 2006 | 38 | 32 |
| 2007 | 35 | 19 |
| 2008 | 27 | 16 |
| 2009 | 20 | 24 |
| 2010 | 17 | 5 |
| 2011 | 9 | 12 |
| 2012 | 11 | 11 |
| 2013 | 13 | 7 |
| 2014 | 7 | 13 |
| 2015 | 8 | 9 |
| 2016 | 9 | 7 |
| 2017 | 10 | 13 |
| 2018 | 9 | 7 |
| 2019 | 8 | 10 |
| 2020 | 11 | 12 |
| 2021 | 12 | 12 |
| 2022 | 5 | 6 |
| 2023 | 6 | 7 |
| 2024 | 5 | 5 |
| 2025 | 3 | 2 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-power multiplexer and demultiplexer for hollow core fiber dense wavelength-division multiplexing (DWDM) applications23 Jun 2026US 12,663,588 B2Microsoft Technology Licensing, LLC
- Transmission grating beam combiner19 May 2026US 12,631,886 B2Lawrence Livermore National Security, LLC
- Apparatus for spectrally combining broadband laser beams by volume Bragg gratings28 Apr 2026US 12,613,424 B2Ipg Photonics Corporation
- Spectral beam combining optical assembly and method of fabrication17 Feb 2026US 12,554,070 B2Coherent Aerospace & Defense, Inc.
- Wavelength selective switching apparatus and related method20 Jan 2026US 12,532,094 B2Huawei Technologies Co., Ltd.
- A system for directing incident light onto spatial light modulator planes30 Jul 2026US 2026/0219457 A1Huber+Suhner Polatis Limited
- Wavelength selective switch with multiple deflector arrays7 May 2026US 2026/0126591 A1O-Net Technologies (Canada) Inc.
- Systems and methods using multi-wavelength single-pulse raman spectroscopy30 Apr 2026US 2026/0118178 A1University of Maryland, Baltimore County
- Wavelength Selective Device and Corresponding Switching Device30 Apr 2026US 2026/0118587 A1Huawei Technologies Co., Ltd.
- Interlocked n-by-n wavelength selective switch19 Feb 2026US 2026/0050125 A1II-Vi Delaware, Inc.
Most cited
By later US patents
- Holographic multiplexer/demultiplexer and its manufacturing method142US 4,824,193 AMatsushita Electric Industrial Co., Ltd. · 1989
- Method and system for testing a tunable chromatic dispersion, dispersion slope, and polarization mode dispersion compensator utilizing a virtually imaged phased array127US 6,441,959 B1Avanex Corporation · 2002
- Spectroscopic apparatus127US 7,304,798 B2Fujitsu Limited · 2007
- Electrically switchable polymer-dispersed liquid crystal materials including switchable optical couplers and reconfigurable optical interconnects126US 6,821,457 B1Science Applications International Corporation · 2004
- Optical filters123US 4,946,245 ABritish Telecommunications Public Ltd.Co. · 1990