Patent · US Active

Optical scanner and electrophotographic image forming apparatus

US11822071B2 · kind B2 · utility

0Cited by

4References

10Claims

0Family size

Assignee

ZHUHAI PANTUM ELECTRONICS CO., LTD. · CN

Inventors

Ronghua Li · Shanghai, CN
Chao-Chun Wang · San Jose, US
Dongning Wang · Qingdao, CN

Key dates

Filing date	Nov 15, 2021
Grant date	Nov 21, 2023
Priority date	—
Expiry date	Jan 25, 2042

Classification

Technology area (CPC G)Physics
CPC primaryG03G15/0435
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Optical scanner and electrophotographic image forming device are provided. The optical scanner includes a light source; and a first optical unit, a deflection apparatus, and an f-θ lens, which are sequentially arranged along a primary optical axis direction of a light beam emitted from the light source. The light beam emitted from the light source is focused onto a scanning target surface after sequentially passing through the first optical unit, the deflection apparatus, and the f-θ lens. Optical scanning directions of the light beam emitted from the light source include a primary scanning direction and a secondary scanning direction which are perpendicular to each other, and along the primary scanning direction, the f-θ lens satisfies following expressions: SAG1>0, SAG2>0, and 0<(SAG1+SAG2)/d<0.8.

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