Patent · US Active

Focus adjustable method of optical image

US7634183B2 · kind B2 · utility

2Cited by
2References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 10, 2005
Grant dateDec 15, 2009
Priority date—
Expiry dateJul 30, 2026

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B7/36
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A focus adjustable method of an optical image is implemented by a numerical analysis. An external light beam is allowed to pass through a lens module, thereby generating an optical image. The focus values of the optical image at four corners thereof are computed according to specified formulas to obtain a two-dimensional geometric tilt vector T(X,Y), an image diagonal spinor D and an image tetragonal average value M. According to the values T(X,Y), D and M, the tilt amount and the tilt direction of the lens module are adjusted, the optical quality of the lens module is discriminated and the focus value distribution of the lens module is determined.

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