Optical element
US9952068B2 · kind B2 · utility
0Cited by
15References
23Claims
0Family size
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Key dates
| Filing date | Oct 15, 2013 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | May 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/366
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical element for generating diffraction orders for an encoder apparatus, in which the optical element includes an array of diffraction features arranged such that the spacing between the centers of adjacent diffraction features varies irregularly from one pair of adjacent features to the next.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.