Patent · US Active

Imaging lens

US8264785B2 · kind B2 · utility

1Cited by
3References
6Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 12, 2008
Grant dateSep 11, 2012
Priority date—
Expiry dateMar 4, 2029

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B13/004
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

An imaging lens includes, sequentially from an object side, a first lens (L11) configured by a negative meniscus lens disposed with the convex surface on the object side; a second lens (L12) configured by a positive biconvex lens; a negative third lens (L13); and a fourth lens group (L14) configured by a positive meniscus lens disposed with the convex surface on the image plane IMG side. By satisfying given conditions, the imaging lens is able to control ghosting occurring between the last lens surface and the imaging element and ghosting caused by light reflected by the lens surface nearest the object, without sacrifice to the compact-size of the optical system or high optical performance.

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