Dual polarizing hood
US8774619B2 · kind B2 · utility
4Cited by
13References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2013 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Oct 9, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2215/0575
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarizing hood including a first polarized filter with the center of the filter removed. Placed forward and in front of the first polarized filter is a second linear polarized filter substantially the size of the hole in the first polarized filter and is held in place by a clear lens. The polarization may be adjusted. In response to light collocated with an objective lens shined through the first polarizing filter, the light become polarized. The reflected polarized light returns through the second polarized filter, and full polarization is accomplished with respect to the viewing camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.