Patent · US Active

Double convex collimator lens, illumination device, and microscope

US9268150B2 · kind B2 · utility

0Cited by
1References
7Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 16, 2013
Grant dateFeb 23, 2016
Priority date—
Expiry dateJan 11, 2034

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B21/26
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

A collimator lens is configured with a double convex single lens formed with a resinous material, for collimating a light flux emitted from a light source. At least one of surfaces of the collimator lens is formed as an aspherical surface. The collimator lens satisfies following conditions:2<|R1/R2|<10;NA>0.6,where R1 is a curvature radius of a first surface, which is a lens surface on a side of the light source of the collimator lens, R2 is a curvature radius of a second surface, which is a lens surface on a side opposite to the first surface of the collimator lens, and NA is a numerical aperture on the side of the light source of the collimator lens.

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