Patent · US Active

Superzoom lenses

US8208206B2 · kind B2 · utility

0Cited by
0References
4Claims
0Family size

Assignee

Inventor

Key dates

Filing dateFeb 9, 2011
Grant dateJun 26, 2012
Priority date—
Expiry dateFeb 9, 2031

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B15/144113
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Superzoom lenses are disclosed. The superzoom lenses include, in order from an object side to an image side on an optical axis, a first lens group, a second lens group, an aperture, a third lens group, and a fourth lens group. The first lens group has positive optical power. The second lens group has negative optical power and is consisted of a convex lens and a concave lens. The third lens group has positive optical power. The fourth lens group has positive optical power. The superzoom lenses satisfy the following relationship when the superzoom lenses are collapsed:3≦LW/ID<5

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