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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9829688 B1

PDFFull Text
Date of Patent:
Nov. 28, 2017

Filed:

May. 02, 2016

Zoom lens

Applicants:

Sintai Optical (Shenzhen) Co., Ltd., Shenzhen, Guandong Province, CN;

Asia Optical International Ltd., Taichung, TW;

Inventor:

Ming-Chung Chen, Changhua, TW;

Assignees:

SINTAI OPTICAL (SHENZHEN) CO., LTD., Taichung, TW;

ASIA OPTICAL INTERNATIONAL LTD., Taichung, TW;

Attorney:

McClure, Qualey & Rodack, LLP

Primary Examiner:

Evelyn A Lester

Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 9/34 (2006.01); G02B 15/177 (2006.01); G02B 13/18 (2006.01); G02B 13/00 (2006.01); G02B 27/00 (2006.01); G02B 15/24 (2006.01); G02B 15/20 (2006.01); G02B 15/15 (2006.01); G02B 5/00 (2006.01); G02B 15/167 (2006.01); G02B 17/08 (2006.01); G02B 19/00 (2006.01);
U.S. Cl.
CPC ...
G02B 15/177 (2013.01); G02B 13/009 (2013.01); G02B 13/18 (2013.01); G02B 5/005 (2013.01); G02B 9/34 (2013.01); G02B 13/002 (2013.01); G02B 13/0065 (2013.01); G02B 15/14 (2013.01); G02B 15/15 (2013.01); G02B 15/167 (2013.01); G02B 15/20 (2013.01); G02B 15/24 (2013.01); G02B 17/08 (2013.01); G02B 17/0856 (2013.01); G02B 19/0028 (2013.01); G02B 27/0025 (2013.01);
Abstract

A zoom lens has a four-group zoom configuration, in order from the object side to the image side, consisting of negative, positive, positive, and positive refractive power. The zoom lens carries out zooming from the wide-angle end to the telephoto end mainly by changing the distance between the third lens group and the fourth lens group. Also, the distance between the second lens group and the third lens group may be decreased in the zooming. Focusing is carried out mainly by moving the second lens group along the optical axis. Such a zoom lens is thin and small in size, and has a great imaging performance.

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