Angular shear plate
US7561346B1 · kind B1 · utility
2Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2007 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Sep 8, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/0875
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
One or more disc-shaped angular shear plates each include a region thereon having a thickness that varies with a nonlinear function. For the case of two such shear plates, they are positioned in a facing relationship and rotated relative to each other. Light passing through the variable thickness regions in the angular plates is refracted. By properly timing the relative rotation of the plates and by the use of an appropriate polynomial function for the thickness of the shear plate, light passing therethrough can be focused at variable positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.