G02B 27/52
Phase contrast optics
Official title: Phase contrast optics (in microscopes G02B21/14)
G02B27/52 (Phase contrast optics) appears on 58 US grants and 51 published applications in this corpus.
Search patents in G02B- Granted patents
- 58
- Published applications
- 51
- Assignees
- 43
- Inventors
- 96
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 3 |
| 2003 | 3 | 3 |
| 2004 | 1 | 4 |
| 2005 | 2 | 2 |
| 2006 | 2 | 2 |
| 2007 | 1 | 4 |
| 2008 | 2 | 3 |
| 2009 | 2 | 5 |
| 2010 | 6 | 5 |
| 2011 | 5 | 2 |
| 2012 | 5 | 2 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 3 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 0 | 2 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Splicing display apparatus for floating image and multi-layer display device comprising the same9 Dec 2025US 12,493,199 B2Shanghai Yupei Photoelectric Technology Limited
- Observation apparatus and method of visualizing phase object2 Dec 2025US 12,487,438 B2Evident Corporation
- Phase difference observation apparatus and cell treatment apparatus7 May 2024US 11,977,214 B2Kataoka Corporation
- Methods, systems and apparatus of interferometry for imaging and sensing7 Mar 2023US 11,598,627 B2Virginia Tech Intellectual Properties, Inc.
- Method and system for enhanced single particle reflectance imaging29 Jun 2021US 11,047,790 B2Trustees of Boston University
- Systems and methods for performing vessel segmentation from flow data representative of flow within a vessel26 Feb 2026US 2026/0057525 A1Purdue Research Foundation
- Diffractive all-optical computing for quantitative phase imaging1 May 2025US 2025/0138296 A1The Regents of the University of California
- Splicing display apparatus for floating image and multi-layer display device comprising the same1 Aug 2024US 2024/0255775 A1Shanghai Yupei Photoelectric Technology Limited
- Observation apparatus and method of visualizing phase object7 Sep 2023US 2023/0280576 A1Evident Corporation
- Device and method for phase stepping in phase contrast image acquisition10 Dec 2020US 2020/0383651 A1Koninklijke Philips N. V.
Most cited
By later US patents
- Wavefront coding phase contrast imaging systems282US 6,525,302 B2The Regents of the University of Colorado · 2003
- Spatial light modulator based phase contrast image projection system84US 5,508,841 ATexas Instruments Incorporated · 1996
- Phase contrast microscope65US 5,751,475 AOlympus Optical Co., Ltd. · 1998
- Extended depth of field optical systems54US 7,436,595 B2The Regents of the University of Colorado · 2008
- Phase contrast imaging47US 6,011,874 AForskningscenter Riso (Danish national laboratory) · 2000