Optical element
US10768026B2 · kind B2 · utility
0Cited by
20References
17Claims
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Assignee
Inventor
Key dates
| Filing date | Mar 19, 2018 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Apr 26, 2038 |
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 centres 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.