OPTICAL ELEMENT, INCLUDING MULTIPLE AREAS
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- VIAVI SOLUTIONS INC(US)
- Filing Date
- 2019-10-25
- Publication Date
- 2026-06-10
AI Technical Summary
Current diffractive optical elements (DOEs) are sensitive to deviations from design wavelength and fabrication errors, leading to a strong zero diffraction order that poses an eye-safety risk and inefficient energy distribution in 3D sensing applications, especially when trying to cover wide angular ranges with small features.
An optical element with a surface featuring regions arranged in a tessellation, each with a random spatial distribution of saddle-shaped microstructures, projecting a target pattern with high efficiency and fixed speckle without a higher intensity in the zero diffraction order, using a coherent light source like a laser.
The solution provides high efficiency and fixed speckle projection, eliminating eye-safety concerns and enhancing contrast for 3D sensing applications by ensuring the zero diffraction order is indistinguishable from other diffraction orders in intensity, thus improving the angular range and speckle stability.