Patent · US Active

Photographic objective lens

US9915805B2 · kind B2 · utility

0Cited by

3References

5Claims

0Family size

Assignee

HAN'S LASER TECHNOLOGY INDUSTRY GROUP CO., LTD. · CN

Inventors

Jiaying Li · Nanhu, CN
Chaoming Zhou · Nanhu, CN
Yunfeng Gao · Nanhu, CN

Key dates

Filing date	Sep 3, 2014
Grant date	Mar 13, 2018
Priority date	—
Expiry date	Sep 3, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG02B13/04
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A photographic objective lens includes a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a fifth lens (L5), a sixth lens (L6), and a seventh lens (L7), which are sequentially coaxially arranged along a propagation direction of incident light, wherein the first lens (L1) is a negative meniscus lens; the second lens (L2) is a drum lens; the third lens (L3) is a negative meniscus lens; the fourth lens (L4) is a drum lens; the fifth lens (L5) is a biconcave lens; the sixth lens (L6) is a positive meniscus lens; the seventh lens (L7) is a biconvex lens; the two curved surfaces of each lens are the light incidence surface and the light outgoing surface of the lens, respectively.

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