G02B 21/084
Having annular illumination around the objective
Official title: {having annular illumination around the objective}
G02B21/084 (Having annular illumination around the objective) appears on 144 US grants and 165 published applications in this corpus.
Search patents in G02B- Granted patents
- 144
- Published applications
- 165
- Assignees
- 120
- Inventors
- 368
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 4 | 2 |
| 2003 | 2 | 5 |
| 2004 | 0 | 3 |
| 2005 | 3 | 2 |
| 2006 | 1 | 1 |
| 2007 | 2 | 5 |
| 2008 | 5 | 4 |
| 2009 | 2 | 5 |
| 2010 | 6 | 5 |
| 2011 | 2 | 6 |
| 2012 | 0 | 4 |
| 2013 | 2 | 6 |
| 2014 | 6 | 8 |
| 2015 | 9 | 9 |
| 2016 | 3 | 7 |
| 2017 | 7 | 12 |
| 2018 | 4 | 8 |
| 2019 | 7 | 13 |
| 2020 | 11 | 9 |
| 2021 | 11 | 15 |
| 2022 | 9 | 10 |
| 2023 | 11 | 7 |
| 2024 | 5 | 8 |
| 2025 | 4 | 5 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Surface illuminator with means for adjusting orientation and inclination of incident illumination171US 5,690,417 AOptical Gaging Products, Inc. · 1997
- Focusing light source with flexible mount for multiple light-emitting elements90US 5,580,163 AAugust Technology Corp. · 1996
- Pulsed lighting imaging systems and methods65US 9,131,861 B2Academisch Medisch Centrum · 2015
- Adjustable ring light51US 4,729,070 A1988
- Direct lighting/illuminating system for miniature CCD camera47US 4,974,094 A1990