Subsurface glass reticles
US9423604B2 · kind B2 · utility
0Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2013 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Aug 8, 2034 |
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.