Subsurface glass reticles
US8541713B1 · kind B1 · utility
2Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2010 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Feb 29, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/50
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An optical instrument for light incoming along a principal optical axis includes a glass block and a subsurface object within the glass block. The subsurface object includes an arrangement of object marks. Each object mark includes a plurality of scattering layers stacked against the principal optical axis of the incoming light. First and second scattering layers of the plurality of scattering layers have different polarization responses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.