Patent · US Active

Ocular optical system

US10317668B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignee

GENIUS ELECTRONIC OPTICAL CO., LTD. · TW

Inventors

Jia-Sin Jhang · Taichung, TW
Baina Chen · Fujian, CN
Zhen-Feng Xie · Fujian, CN

Key dates

Filing date	Nov 10, 2016
Grant date	Jun 11, 2019
Priority date	—
Expiry date	Nov 12, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0123
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An ocular optical system includes a first lens element and a second lens element from an eye-side to a display-side in order along an optical axis. The first lens element and the second lens element each include an eye-side surface and a display-side surface. The eye-side surface of the first lens element has a convex portion in a vicinity of the optical axis. The second lens element has negative refracting power. The ocular optical system satisfies 1.5≤|f2/f1| and 250 millimeters/EFL≤10, wherein f2 is the focal length of the second lens element, f1 is the focal length of the first lens element, and EFL is the effective focal length of the ocular optical system.

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