Patent · US Active

Aspherical cemented lens

US10663701B2 · kind B2 · utility

0Cited by
0References
4Claims
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Inventor

Key dates

Filing dateJul 3, 2018
Grant dateMay 26, 2020
Priority date—
Expiry dateFeb 6, 2039

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B2003/0093
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

To provide an aspheric cemented lens which is easy to design and manufacture and has less aberration by using an inexpensive material such as a resin material. The aspheric cemented lens has at least three interfaces, when three interfaces are defined as a third interface, a second interface and a first interface in order from a light exit surface, chromatic aberration is corrected at the first interface and the second interface. The third interface is a hyperboloid or a surface close to a hyperboloid. When light is incident on the first interface parallel to the optical axis, the exit light from the third interface is converged to almost a single point. In order to correct chromatic aberration, the first interface and the second interface are curved surfaces.

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