Patent · US Active

Polarized pixelated filter array with reduced sensitivity to misalignment for polarimetric imaging

US10969598B2 · kind B2 · utility

20Cited by
1References
13Claims
0Family size

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Key dates

Filing dateOct 16, 2018
Grant dateApr 6, 2021
Priority date—
Expiry dateAug 3, 2039

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG06T2207/10048
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Polarized pixelated filter sub-array is reconfigured to reduce sensitivity to misalignment. The condition number increases more slowly than the standard polarized pixelated filter sub-array as the misalignment increases. In different embodiments, the filter sub-array is configured such that the condition number has a finite bound at ½ pixel misalignment. The angular values of the polarizer filter array are determined to minimize the sensitivity of the condition number of the data reduction matrix to misalignment. This can be achieved by selecting angular values that minimize the expected value of the condition number E(CN) over the range of misalignment.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.